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new file mode 100644
index 000000000..3263a7bba
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diff --git a/tests/tx_data/input/alt-missing-glif.ufo/data/com.adobe.type.processedHashMap b/tests/tx_data/input/alt-missing-glif.ufo/data/com.adobe.type.processedHashMap
new file mode 100644
index 000000000..7d415a1d5
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/data/com.adobe.type.processedHashMap
@@ -0,0 +1,67 @@
+{
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+'u': ['w544l751787554121-12c224-12291-1233923c38476l38776l3940l4620l462486l380486l3801413348429959c249591855915898c158189l158486l75486', ['checkOutlines', 'autohint']],
+'v': ['w467l1870l2830l455486l374486l282210268162252113c23867l23467219113203162c189210l97486l12486', ['checkOutlines', 'autohint']],
+'w': ['2ea4b8a7d7ff3087d4b143fb61ccd52c7bbefea83f2621ea83acd290d608f5420f5901acf12c09a90c698706b59069e9a9cd491b25e1bb843870e856b5f96517', ['checkOutlines', 'autohint']],
+'x': ['c60e1f49a95ba6875b061ad4c854be857877f9b16c1d60ca4ac6242f348cf7f442c9d38142b5acffaf12f7bdce56e5683edf22841a773b2d1e380160313d2687', ['checkOutlines', 'autohint']],
+'y': ['d14e2d31ca4e240c0b5c0130ab5367c49328b53fbb3dbe6843e4850856ec272cba1630455ed6acfb3f4185d8e3b4707964fae99e2d3bf183f41c17ea7db51987', ['checkOutlines', 'autohint']],
+'z': ['w425l310l3990l39967l13567l391442l391486l59486l59419l287419l3144', ['checkOutlines', 'autohint']],
+'zero': ['d8c77fb9b3c0f9a266a500cc9a55d0b870a270cc6affab1f87696fc531c727c150c60060200509eb3bb0279a21a90b4245e39bb9992f482674cec535549888b2', ['checkOutlines', 'autohint']],
+}
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/fontinfo.plist b/tests/tx_data/input/alt-missing-glif.ufo/fontinfo.plist
new file mode 100644
index 000000000..9f1baa884
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/fontinfo.plist
@@ -0,0 +1,84 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>ascender</key>
+		<integer>750</integer>
+		<key>capHeight</key>
+		<integer>750</integer>
+		<key>copyright</key>
+		<string> </string>
+		<key>descender</key>
+		<integer>-250</integer>
+		<key>familyName</key>
+		<string>Exercise 1</string>
+		<key>guidelines</key>
+		<array>
+		</array>
+		<key>italicAngle</key>
+		<integer>0</integer>
+		<key>postscriptBlueFuzz</key>
+		<integer>0</integer>
+		<key>postscriptBlueScale</key>
+		<real>0.0625</real>
+		<key>postscriptBlueShift</key>
+		<integer>7</integer>
+		<key>postscriptBlueValues</key>
+		<array>
+			<integer>-12</integer>
+			<integer>0</integer>
+			<integer>486</integer>
+			<integer>498</integer>
+			<integer>518</integer>
+			<integer>530</integer>
+			<integer>574</integer>
+			<integer>586</integer>
+			<integer>638</integer>
+			<integer>650</integer>
+			<integer>656</integer>
+			<integer>668</integer>
+			<integer>712</integer>
+			<integer>724</integer>
+		</array>
+		<key>postscriptFamilyBlues</key>
+		<array>
+		</array>
+		<key>postscriptFamilyOtherBlues</key>
+		<array>
+		</array>
+		<key>postscriptFontName</key>
+		<string>Exercise1-Regular</string>
+		<key>postscriptOtherBlues</key>
+		<array>
+			<integer>-217</integer>
+			<integer>-205</integer>
+		</array>
+		<key>postscriptStemSnapH</key>
+		<array>
+			<integer>68</integer>
+		</array>
+		<key>postscriptStemSnapV</key>
+		<array>
+			<integer>82</integer>
+			<integer>86</integer>
+		</array>
+		<key>postscriptUnderlinePosition</key>
+		<integer>-100</integer>
+		<key>postscriptUnderlineThickness</key>
+		<integer>51</integer>
+		<key>postscriptWeightName</key>
+		<string>Regular</string>
+		<key>styleName</key>
+		<string>Regular</string>
+		<key>trademark</key>
+		<string> </string>
+		<key>unitsPerEm</key>
+		<integer>1000</integer>
+		<key>versionMajor</key>
+		<integer>1</integer>
+		<key>versionMinor</key>
+		<integer>0</integer>
+		<key>xHeight</key>
+		<integer>500</integer>
+	</dict>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/A_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/A_.glif
new file mode 100644
index 000000000..55323869c
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/A_.glif
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="A" format="2">
+	<unicode hex="0041"/>
+	<advance width="544"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="452" y="0" type="line"/>
+			<point x="541" y="0" type="line"/>
+			<point x="319" y="656" type="line"/>
+			<point x="225" y="656" type="line"/>
+			<point x="3" y="0" type="line"/>
+			<point x="88" y="0" type="line"/>
+			<point x="151" y="200" type="line"/>
+			<point x="390" y="200" type="line"/>
+		</contour>
+		<contour>
+			<point x="203" y="367" type="line"/>
+			<point x="227" y="440"/>
+			<point x="248" y="512"/>
+			<point x="268" y="588" type="curve"/>
+			<point x="272" y="588" type="line"/>
+			<point x="293" y="512"/>
+			<point x="314" y="440"/>
+			<point x="338" y="367" type="curve"/>
+			<point x="369" y="267" type="line"/>
+			<point x="172" y="267" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 200 67</string>
+							<string>hstem 588 68</string>
+							<string>vstem 3 538</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w544l4520l5410l319656l225656l30l880l151200l390200l203367227440248512c268588l272588293512314440c338367l369267l172267</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/B_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/B_.glif
new file mode 100644
index 000000000..ebe2b080b
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/B_.glif
@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="B" format="2">
+	<unicode hex="0042"/>
+	<advance width="588"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="299" y="0" type="line"/>
+			<point x="446" y="0"/>
+			<point x="548" y="63"/>
+			<point x="548" y="192" type="curve"/>
+			<point x="548" y="282"/>
+			<point x="492" y="334"/>
+			<point x="396" y="349" type="curve"/>
+			<point x="396" y="353" type="line"/>
+			<point name="hintSet0005" x="473" y="373"/>
+			<point x="510" y="431"/>
+			<point x="510" y="496" type="curve"/>
+			<point x="510" y="611"/>
+			<point x="418" y="656"/>
+			<point x="285" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+		<contour>
+			<point x="173" y="376" type="line"/>
+			<point x="173" y="590" type="line"/>
+			<point x="274" y="590" type="line"/>
+			<point x="376" y="590"/>
+			<point x="428" y="560"/>
+			<point x="428" y="489" type="curve"/>
+			<point x="428" y="416"/>
+			<point x="382" y="376"/>
+			<point x="270" y="376" type="curve"/>
+		</contour>
+		<contour>
+			<point x="173" y="66" type="line"/>
+			<point x="173" y="314" type="line"/>
+			<point x="287" y="314" type="line"/>
+			<point name="hintSet0016" x="402" y="314"/>
+			<point x="466" y="277"/>
+			<point x="466" y="196" type="curve"/>
+			<point x="466" y="107"/>
+			<point x="400" y="66"/>
+			<point x="287" y="66" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 66</string>
+							<string>hstem 314 62</string>
+							<string>hstem 590 66</string>
+							<string>vstem 90 83</string>
+							<string>vstem 466 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 66</string>
+							<string>hstem 314 62</string>
+							<string>hstem 590 66</string>
+							<string>vstem 90 83</string>
+							<string>vstem 428 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0016</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 66</string>
+							<string>hstem 314 62</string>
+							<string>hstem 590 66</string>
+							<string>vstem 90 83</string>
+							<string>vstem 466 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>bd4977f3195ae5d9ee51128baf4232b4cbce2663b0de63a8cf877e31de29998421209050b1a3608b12c296e09ace8d5b7116d5ba4774b14880a4471dd1a4db07</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/C_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/C_.glif
new file mode 100644
index 000000000..a59acfc04
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/C_.glif
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="C" format="2">
+	<unicode hex="0043"/>
+	<advance width="571"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="52" y="328" type="curve"/>
+			<point x="52" y="114"/>
+			<point x="174" y="-12"/>
+			<point x="339" y="-12" type="curve"/>
+			<point x="423" y="-12"/>
+			<point x="487" y="23"/>
+			<point x="539" y="83" type="curve"/>
+			<point x="492" y="134" type="line"/>
+			<point x="450" y="87"/>
+			<point x="404" y="61"/>
+			<point x="341" y="61" type="curve"/>
+			<point x="217" y="61"/>
+			<point x="138" y="165"/>
+			<point x="138" y="330" type="curve"/>
+			<point x="138" y="493"/>
+			<point x="220" y="595"/>
+			<point x="345" y="595" type="curve"/>
+			<point x="400" y="595"/>
+			<point x="442" y="571"/>
+			<point x="476" y="534" type="curve"/>
+			<point x="523" y="587" type="line"/>
+			<point x="485" y="630"/>
+			<point x="423" y="668"/>
+			<point x="344" y="668" type="curve"/>
+			<point x="176" y="668"/>
+			<point x="52" y="539"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 73</string>
+							<string>hstem 595 73</string>
+							<string>vstem 52 86</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>c6d34c50586b4c9def26d533a6683065251060c70cac59e410bdbad68c4fa14b819ebb4e5b304a9b2c50d944f85ef9e0a5faa8475c1404ba626cbec4ae6fafbe</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/D_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/D_.glif
new file mode 100644
index 000000000..3a24b4bc7
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/D_.glif
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="D" format="2">
+	<unicode hex="0044"/>
+	<advance width="615"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="258" y="0" type="line"/>
+			<point x="456" y="0"/>
+			<point x="564" y="122"/>
+			<point x="564" y="331" type="curve"/>
+			<point x="564" y="539"/>
+			<point x="456" y="656"/>
+			<point x="254" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+		<contour>
+			<point x="173" y="68" type="line"/>
+			<point x="173" y="588" type="line"/>
+			<point x="248" y="588" type="line"/>
+			<point x="401" y="588"/>
+			<point x="478" y="496"/>
+			<point x="478" y="331" type="curve"/>
+			<point x="478" y="165"/>
+			<point x="401" y="68"/>
+			<point x="248" y="68" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 68</string>
+							<string>hstem 588 68</string>
+							<string>vstem 90 83</string>
+							<string>vstem 478 86</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w615l900l25804560564122c564331564539456656c254656l90656l17368l173588l248588401588478496c47833147816540168c24868</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/E_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/E_.glif
new file mode 100644
index 000000000..37937ec3a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/E_.glif
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="E" format="2">
+	<unicode hex="0045"/>
+	<advance width="527"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="478" y="0" type="line"/>
+			<point x="478" y="71" type="line"/>
+			<point x="173" y="71" type="line"/>
+			<point x="173" y="309" type="line"/>
+			<point x="422" y="309" type="line"/>
+			<point x="422" y="380" type="line"/>
+			<point x="173" y="380" type="line"/>
+			<point x="173" y="586" type="line"/>
+			<point x="468" y="586" type="line"/>
+			<point x="468" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 71</string>
+							<string>hstem 309 71</string>
+							<string>hstem 586 70</string>
+							<string>vstem 90 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w527l900l4780l47871l17371l173309l422309l422380l173380l173586l468586l468656l90656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/F_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/F_.glif
new file mode 100644
index 000000000..2a022f8a0
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/F_.glif
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="F" format="2">
+	<unicode hex="0046"/>
+	<advance width="494"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="294" type="line"/>
+			<point x="423" y="294" type="line"/>
+			<point x="423" y="364" type="line"/>
+			<point x="173" y="364" type="line"/>
+			<point x="173" y="586" type="line"/>
+			<point x="468" y="586" type="line"/>
+			<point x="468" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 294 70</string>
+							<string>hstem 586 70</string>
+							<string>vstem 90 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w494l900l1730l173294l423294l423364l173364l173586l468586l468656l90656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/G_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/G_.glif
new file mode 100644
index 000000000..b39508074
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/G_.glif
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="G" format="2">
+	<unicode hex="0047"/>
+	<advance width="617"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="52" y="328" type="curve"/>
+			<point x="52" y="114"/>
+			<point x="175" y="-12"/>
+			<point x="347" y="-12" type="curve"/>
+			<point x="435" y="-12"/>
+			<point x="507" y="20"/>
+			<point x="550" y="64" type="curve"/>
+			<point x="550" y="340" type="line"/>
+			<point x="335" y="340" type="line"/>
+			<point x="335" y="271" type="line"/>
+			<point x="474" y="271" type="line"/>
+			<point x="474" y="100" type="line"/>
+			<point x="448" y="76"/>
+			<point x="403" y="61"/>
+			<point x="356" y="61" type="curve"/>
+			<point x="216" y="61"/>
+			<point x="138" y="165"/>
+			<point x="138" y="330" type="curve"/>
+			<point x="138" y="493"/>
+			<point x="223" y="595"/>
+			<point x="355" y="595" type="curve"/>
+			<point x="421" y="595"/>
+			<point x="462" y="569"/>
+			<point x="495" y="534" type="curve"/>
+			<point x="542" y="587" type="line"/>
+			<point x="504" y="627"/>
+			<point x="444" y="668"/>
+			<point x="354" y="668" type="curve"/>
+			<point x="179" y="668"/>
+			<point x="52" y="539"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 73</string>
+							<string>hstem 271 69</string>
+							<string>hstem 595 73</string>
+							<string>vstem 52 86</string>
+							<string>vstem 474 76</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>2269e36343ed191177dbabff76144dacbac9aebe0a6f66ecfda5a040afe3112ee329d2887a5e0e0281abe1bc579f4734a6ba38e6b8a11e33eefc202564ca1c7f</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/H_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/H_.glif
new file mode 100644
index 000000000..b0663b0c0
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/H_.glif
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="H" format="2">
+	<unicode hex="0048"/>
+	<advance width="652"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="309" type="line"/>
+			<point x="478" y="309" type="line"/>
+			<point x="478" y="0" type="line"/>
+			<point x="562" y="0" type="line"/>
+			<point x="562" y="656" type="line"/>
+			<point x="478" y="656" type="line"/>
+			<point x="478" y="381" type="line"/>
+			<point x="173" y="381" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 309 72</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 90 83</string>
+							<string>vstem 478 84</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w652l900l1730l173309l478309l4780l5620l562656l478656l478381l173381l173656l90656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/I_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/I_.glif
new file mode 100644
index 000000000..23884ca31
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/I_.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="I" format="2">
+	<unicode hex="0049"/>
+	<advance width="263"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 90 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w263l900l1730l173656l90656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/J_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/J_.glif
new file mode 100644
index 000000000..c74548382
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/J_.glif
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="J" format="2">
+	<unicode hex="004A"/>
+	<advance width="480"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="31" y="93" type="line"/>
+			<point x="69" y="24"/>
+			<point x="129" y="-12"/>
+			<point x="212" y="-12" type="curve"/>
+			<point x="340" y="-12"/>
+			<point x="393" y="80"/>
+			<point x="393" y="193" type="curve"/>
+			<point x="393" y="656" type="line"/>
+			<point x="309" y="656" type="line"/>
+			<point x="309" y="201" type="line"/>
+			<point x="309" y="101"/>
+			<point x="274" y="61"/>
+			<point x="204" y="61" type="curve"/>
+			<point x="157" y="61"/>
+			<point x="120" y="83"/>
+			<point x="91" y="135" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 73</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 309 84</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w480l31936924129-12c212-12340-1239380c393193l393656l309656l30920130910127461c204611576112083c91135</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/K_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/K_.glif
new file mode 100644
index 000000000..1653de4b5
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/K_.glif
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="K" format="2">
+	<unicode hex="004B"/>
+	<advance width="579"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="208" type="line"/>
+			<point x="286" y="341" type="line"/>
+			<point x="482" y="0" type="line"/>
+			<point x="575" y="0" type="line"/>
+			<point x="338" y="406" type="line"/>
+			<point x="543" y="656" type="line"/>
+			<point x="449" y="656" type="line"/>
+			<point x="176" y="327" type="line"/>
+			<point x="173" y="327" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 90 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w579l900l1730l173208l286341l4820l5750l338406l543656l449656l176327l173327l173656l90656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/L_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/L_.glif
new file mode 100644
index 000000000..acbb2e00d
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/L_.glif
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="L" format="2">
+	<unicode hex="004C"/>
+	<advance width="486"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="460" y="0" type="line"/>
+			<point x="460" y="71" type="line"/>
+			<point x="173" y="71" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 71</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 90 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w486l900l4600l46071l17371l173656l90656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/M_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/M_.glif
new file mode 100644
index 000000000..1f351a4e2
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/M_.glif
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="M" format="2">
+	<unicode hex="004D"/>
+	<advance width="727"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="167" y="0" type="line"/>
+			<point x="167" y="361" type="line"/>
+			<point x="167" y="419"/>
+			<point x="160" y="497"/>
+			<point x="156" y="555" type="curve"/>
+			<point x="160" y="555" type="line"/>
+			<point x="212" y="409" type="line"/>
+			<point x="339" y="66" type="line"/>
+			<point x="386" y="66" type="line"/>
+			<point x="512" y="409" type="line"/>
+			<point x="565" y="555" type="line"/>
+			<point x="569" y="555" type="line"/>
+			<point x="564" y="497"/>
+			<point x="558" y="419"/>
+			<point x="558" y="361" type="curve"/>
+			<point x="558" y="0" type="line"/>
+			<point x="637" y="0" type="line"/>
+			<point x="637" y="656" type="line"/>
+			<point x="539" y="656" type="line"/>
+			<point x="413" y="304" type="line"/>
+			<point x="367" y="170" type="line"/>
+			<point x="363" y="170" type="line"/>
+			<point x="315" y="304" type="line"/>
+			<point x="188" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 66 104</string>
+							<string>hstem 555 101</string>
+							<string>vstem 90 77</string>
+							<string>vstem 558 79</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>3536c1a1bf159a6cc1cd19dbf7f77490b7087f83070bf12462b94617a087f0b85c94b88a08da77a6f2d7048355d76e3ceee72023ce1e348119eec935000270fe</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/N_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/N_.glif
new file mode 100644
index 000000000..5d6416177
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/N_.glif
@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="N" format="2">
+	<unicode hex="004E"/>
+	<advance width="647"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="169" y="0" type="line"/>
+			<point x="169" y="343" type="line"/>
+			<point name="hintSet0003" x="169" y="412"/>
+			<point x="163" y="482"/>
+			<point x="158" y="548" type="curve"/>
+			<point x="162" y="548" type="line"/>
+			<point x="233" y="413" type="line"/>
+			<point x="471" y="0" type="line"/>
+			<point x="557" y="0" type="line"/>
+			<point x="557" y="656" type="line"/>
+			<point x="478" y="656" type="line"/>
+			<point x="478" y="317" type="line"/>
+			<point name="hintSet0011" x="478" y="248"/>
+			<point x="484" y="174"/>
+			<point x="488" y="108" type="curve"/>
+			<point x="484" y="108" type="line"/>
+			<point x="413" y="244" type="line"/>
+			<point x="176" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 90 79</string>
+							<string>vstem 478 79</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0003</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 548 108</string>
+							<string>vstem 90 79</string>
+							<string>vstem 478 79</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0011</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 108</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 90 79</string>
+							<string>vstem 478 79</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>0876aba1f5d3297dab45b12d67a399dfcad8df5bfa302e64dda7213a0d2e4d9114ceb5eba0c1813a0e72e01f830cd40b9e5ff05e0da452a976195b7017bf3cfc</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/O_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/O_.glif
new file mode 100644
index 000000000..2d131c016
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/O_.glif
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="O" format="2">
+	<unicode hex="004F"/>
+	<advance width="664"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="332" y="-12" type="curve"/>
+			<point x="497" y="-12"/>
+			<point x="613" y="120"/>
+			<point x="613" y="331" type="curve"/>
+			<point x="613" y="540"/>
+			<point x="497" y="668"/>
+			<point x="332" y="668" type="curve"/>
+			<point x="167" y="668"/>
+			<point x="52" y="541"/>
+			<point x="52" y="331" type="curve"/>
+			<point x="52" y="120"/>
+			<point x="167" y="-12"/>
+		</contour>
+		<contour>
+			<point x="332" y="61" type="curve"/>
+			<point x="215" y="61"/>
+			<point x="138" y="167"/>
+			<point x="138" y="331" type="curve"/>
+			<point x="138" y="494"/>
+			<point x="215" y="595"/>
+			<point x="332" y="595" type="curve"/>
+			<point x="449" y="595"/>
+			<point x="526" y="494"/>
+			<point x="526" y="331" type="curve"/>
+			<point x="526" y="167"/>
+			<point x="449" y="61"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 73</string>
+							<string>hstem 595 73</string>
+							<string>vstem 52 86</string>
+							<string>vstem 526 87</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>979b46dca37c933907e4ee50a973c34c43d643256eba747c98ed0444373dad83225762727112912ee1f2e514723f6a3290d12d86a08b028d9f1d8b512d0fb4c8</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/P_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/P_.glif
new file mode 100644
index 000000000..c290bfd78
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/P_.glif
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="P" format="2">
+	<unicode hex="0050"/>
+	<advance width="576"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="260" type="line"/>
+			<point x="291" y="260" type="line"/>
+			<point x="435" y="260"/>
+			<point x="533" y="325"/>
+			<point x="533" y="463" type="curve"/>
+			<point x="533" y="607"/>
+			<point x="436" y="656"/>
+			<point x="291" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+		<contour>
+			<point x="173" y="328" type="line"/>
+			<point x="173" y="589" type="line"/>
+			<point x="281" y="589" type="line"/>
+			<point x="394" y="589"/>
+			<point x="450" y="558"/>
+			<point x="450" y="463" type="curve"/>
+			<point x="450" y="370"/>
+			<point x="395" y="328"/>
+			<point x="281" y="328" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 260 68</string>
+							<string>hstem 589 67</string>
+							<string>vstem 90 83</string>
+							<string>vstem 450 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>99a6ffe6e4c99a7dae0a8f628e07708a7461acffdccfa5a36b24dc5347196d854f31a0e3edeaa08422daa9b2cfd6dde0a2f3ec38cc4416142ea7d79727dd438b</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Q_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Q_.glif
new file mode 100644
index 000000000..c571f6cb5
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Q_.glif
@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="Q" format="2">
+	<unicode hex="0051"/>
+	<advance width="664"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="138" y="331" type="curve"/>
+			<point x="138" y="494"/>
+			<point x="215" y="595"/>
+			<point x="332" y="595" type="curve"/>
+			<point x="449" y="595"/>
+			<point x="526" y="494"/>
+			<point x="526" y="331" type="curve"/>
+			<point x="526" y="163"/>
+			<point x="449" y="57"/>
+			<point x="332" y="57" type="curve"/>
+			<point x="215" y="57"/>
+			<point x="138" y="163"/>
+		</contour>
+		<contour>
+			<point x="611" y="-84" type="line"/>
+			<point x="593" y="-89"/>
+			<point x="571" y="-94"/>
+			<point x="542" y="-94" type="curve"/>
+			<point x="471" y="-94"/>
+			<point x="411" y="-66"/>
+			<point x="381" y="-8" type="curve"/>
+			<point x="520" y="16"/>
+			<point x="613" y="142"/>
+			<point x="613" y="331" type="curve"/>
+			<point x="613" y="540"/>
+			<point x="497" y="668"/>
+			<point x="332" y="668" type="curve"/>
+			<point x="167" y="668"/>
+			<point x="52" y="541"/>
+			<point x="52" y="331" type="curve"/>
+			<point x="52" y="138"/>
+			<point x="148" y="11"/>
+			<point x="291" y="-9" type="curve"/>
+			<point x="329" y="-99"/>
+			<point x="412" y="-164"/>
+			<point x="533" y="-164" type="curve"/>
+			<point x="572" y="-164"/>
+			<point x="607" y="-156"/>
+			<point x="627" y="-149" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -164 70</string>
+							<string>hstem -8 65</string>
+							<string>hstem 595 73</string>
+							<string>vstem 52 86</string>
+							<string>vstem 526 87</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>fa67843b2de05ad2f81d4f410a0f7070902baecfd74ca4fe1d6d611addc78b2f261d0b13d7fd41e6c5f1f0dac76b80be1e5b63a2cfe88d56fd79890f8b9bf57d</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/R_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/R_.glif
new file mode 100644
index 000000000..3145071bd
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/R_.glif
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="R" format="2">
+	<unicode hex="0052"/>
+	<advance width="581"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="173" y="589" type="line"/>
+			<point x="283" y="589" type="line"/>
+			<point x="385" y="589"/>
+			<point x="442" y="558"/>
+			<point x="442" y="472" type="curve"/>
+			<point x="442" y="387"/>
+			<point x="385" y="345"/>
+			<point x="283" y="345" type="curve"/>
+			<point x="173" y="345" type="line"/>
+		</contour>
+		<contour>
+			<point x="544" y="0" type="line"/>
+			<point x="378" y="286" type="line"/>
+			<point x="467" y="308"/>
+			<point x="525" y="370"/>
+			<point x="525" y="472" type="curve"/>
+			<point x="525" y="608"/>
+			<point x="429" y="656"/>
+			<point x="295" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="277" type="line"/>
+			<point x="292" y="277" type="line"/>
+			<point x="450" y="0" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 277 68</string>
+							<string>hstem 589 67</string>
+							<string>vstem 90 83</string>
+							<string>vstem 442 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>2e2ddfebdefdbbe975ec231cb5c08baa9e0b7df47c8a2bb8742f8ce6b1183b167768bfe02522ee55da965ccdba175d75f71974c10cbb09e4be73417a12607d28</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/S_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/S_.glif
new file mode 100644
index 000000000..b38d6ef89
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/S_.glif
@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="S" format="2">
+	<unicode hex="0053"/>
+	<advance width="534"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="42" y="85" type="line"/>
+			<point x="99" y="26"/>
+			<point x="180" y="-12"/>
+			<point x="272" y="-12" type="curve"/>
+			<point x="410" y="-12"/>
+			<point x="495" y="71"/>
+			<point x="495" y="175" type="curve"/>
+			<point x="495" y="272"/>
+			<point x="436" y="317"/>
+			<point x="360" y="350" type="curve"/>
+			<point x="267" y="390" type="line"/>
+			<point x="215" y="412"/>
+			<point x="158" y="436"/>
+			<point x="158" y="499" type="curve"/>
+			<point x="158" y="558"/>
+			<point x="207" y="595"/>
+			<point x="280" y="595" type="curve"/>
+			<point x="341" y="595"/>
+			<point x="389" y="571"/>
+			<point x="429" y="533" type="curve"/>
+			<point x="474" y="587" type="line"/>
+			<point x="427" y="635"/>
+			<point x="358" y="668"/>
+			<point x="280" y="668" type="curve"/>
+			<point x="161" y="668"/>
+			<point x="74" y="594"/>
+			<point x="74" y="494" type="curve"/>
+			<point x="74" y="398"/>
+			<point x="145" y="351"/>
+			<point x="207" y="325" type="curve"/>
+			<point x="301" y="284" type="line"/>
+			<point x="363" y="256"/>
+			<point x="410" y="235"/>
+			<point x="410" y="168" type="curve"/>
+			<point x="410" y="104"/>
+			<point x="359" y="61"/>
+			<point x="273" y="61" type="curve"/>
+			<point x="205" y="61"/>
+			<point x="139" y="94"/>
+			<point x="92" y="143" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 73</string>
+							<string>hstem 595 73</string>
+							<string>vstem 74 84</string>
+							<string>vstem 410 85</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>2536f290acb178f160a8fe63035d7dd62277be439fdf2033a7857a5747ae26d5cb9cca1d6eeac2aa1ba4e20fa6aca8871a9f22e080c80ec30d7142953fc61cf7</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/T_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/T_.glif
new file mode 100644
index 000000000..ae4d6db60
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/T_.glif
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="T" format="2">
+	<unicode hex="0054"/>
+	<advance width="536"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="226" y="0" type="line"/>
+			<point x="310" y="0" type="line"/>
+			<point x="310" y="586" type="line"/>
+			<point x="508" y="586" type="line"/>
+			<point x="508" y="656" type="line"/>
+			<point x="28" y="656" type="line"/>
+			<point x="28" y="586" type="line"/>
+			<point x="226" y="586" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 586 70</string>
+							<string>vstem 226 84</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w536l2260l3100l310586l508586l508656l28656l28586l226586</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/U_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/U_.glif
new file mode 100644
index 000000000..1f2e0b21a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/U_.glif
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="U" format="2">
+	<unicode hex="0055"/>
+	<advance width="645"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="87" y="271" type="line"/>
+			<point x="87" y="60"/>
+			<point x="189" y="-12"/>
+			<point x="323" y="-12" type="curve"/>
+			<point x="457" y="-12"/>
+			<point x="558" y="60"/>
+			<point x="558" y="271" type="curve"/>
+			<point x="558" y="656" type="line"/>
+			<point x="478" y="656" type="line"/>
+			<point x="478" y="269" type="line"/>
+			<point x="478" y="111"/>
+			<point x="410" y="61"/>
+			<point x="323" y="61" type="curve"/>
+			<point x="237" y="61"/>
+			<point x="170" y="111"/>
+			<point x="170" y="269" type="curve"/>
+			<point x="170" y="656" type="line"/>
+			<point x="87" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 73</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 87 83</string>
+							<string>vstem 478 80</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w645l872718760189-12c323-12457-1255860c558271l558656l478656l47826947811141061c3236123761170111c170269l170656l87656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/V_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/V_.glif
new file mode 100644
index 000000000..a2f474f26
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/V_.glif
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="V" format="2">
+	<unicode hex="0056"/>
+	<advance width="515"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="210" y="0" type="line"/>
+			<point x="307" y="0" type="line"/>
+			<point x="515" y="656" type="line"/>
+			<point x="430" y="656" type="line"/>
+			<point x="325" y="302" type="line"/>
+			<point x="302" y="224"/>
+			<point x="286" y="162"/>
+			<point x="262" y="85" type="curve"/>
+			<point x="258" y="85" type="line"/>
+			<point x="233" y="162"/>
+			<point x="218" y="224"/>
+			<point x="194" y="302" type="curve"/>
+			<point x="89" y="656" type="line"/>
+			<point x="0" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 85</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 0 515</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w515l2100l3070l515656l430656l325302302224286162c26285l25885233162218224c194302l89656l0656</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/W_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/W_.glif
new file mode 100644
index 000000000..bdb0e27b5
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/W_.glif
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="W" format="2">
+	<unicode hex="0057"/>
+	<advance width="786"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="162" y="0" type="line"/>
+			<point x="261" y="0" type="line"/>
+			<point x="358" y="395" type="line"/>
+			<point name="hintSet0003" x="369" y="446"/>
+			<point x="381" y="493"/>
+			<point x="391" y="544" type="curve"/>
+			<point x="395" y="544" type="line"/>
+			<point x="405" y="493"/>
+			<point x="415" y="446"/>
+			<point x="427" y="395" type="curve"/>
+			<point x="526" y="0" type="line"/>
+			<point x="626" y="0" type="line"/>
+			<point x="762" y="656" type="line"/>
+			<point x="682" y="656" type="line"/>
+			<point x="613" y="299" type="line"/>
+			<point x="600" y="229"/>
+			<point x="588" y="158"/>
+			<point x="576" y="87" type="curve"/>
+			<point x="572" y="87" type="line"/>
+			<point x="556" y="158"/>
+			<point x="540" y="230"/>
+			<point x="524" y="299" type="curve"/>
+			<point x="433" y="656" type="line"/>
+			<point x="357" y="656" type="line"/>
+			<point x="266" y="299" type="line"/>
+			<point x="251" y="229"/>
+			<point x="235" y="158"/>
+			<point x="220" y="87" type="curve"/>
+			<point x="216" y="87" type="line"/>
+			<point x="204" y="158"/>
+			<point x="190" y="228"/>
+			<point x="178" y="299" type="curve"/>
+			<point x="109" y="656" type="line"/>
+			<point x="23" y="656" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 87</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 23 739</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0003</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 87</string>
+							<string>hstem 544 112</string>
+							<string>vstem 23 739</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>29c5f20a29e7cc4cdf208439e44a6d7e2f935f6bc370b1c3c725a73f33afb7c06461904917ee051c5aff041b4fd614fbda28d83ff780e634e4a8e0668af95d92</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/X_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/X_.glif
new file mode 100644
index 000000000..9312dd1b5
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/X_.glif
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="X" format="2">
+	<unicode hex="0058"/>
+	<advance width="513"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="15" y="0" type="line"/>
+			<point x="103" y="0" type="line"/>
+			<point x="198" y="177" type="line"/>
+			<point x="214" y="209"/>
+			<point x="231" y="242"/>
+			<point x="250" y="282" type="curve"/>
+			<point x="254" y="282" type="line"/>
+			<point x="275" y="242"/>
+			<point x="293" y="209"/>
+			<point x="310" y="177" type="curve"/>
+			<point x="406" y="0" type="line"/>
+			<point x="498" y="0" type="line"/>
+			<point x="307" y="335" type="line"/>
+			<point x="486" y="656" type="line"/>
+			<point x="398" y="656" type="line"/>
+			<point x="311" y="488" type="line"/>
+			<point x="295" y="458"/>
+			<point x="282" y="431"/>
+			<point x="264" y="393" type="curve"/>
+			<point x="260" y="393" type="line"/>
+			<point x="240" y="431"/>
+			<point x="226" y="458"/>
+			<point x="209" y="488" type="curve"/>
+			<point x="120" y="656" type="line"/>
+			<point x="28" y="656" type="line"/>
+			<point x="206" y="339" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 15 483</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>ca091a711edf624812896f61a17203052f89539bed5eaf9b6823faef971c8d462492193c095a1c7d2e245583ff8593a54ce2e26ef89249b5168805994df234f8</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Y_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Y_.glif
new file mode 100644
index 000000000..a7ed567e6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Y_.glif
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="Y" format="2">
+	<unicode hex="0059"/>
+	<advance width="476"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="196" y="0" type="line"/>
+			<point x="280" y="0" type="line"/>
+			<point x="280" y="254" type="line"/>
+			<point x="477" y="656" type="line"/>
+			<point x="390" y="656" type="line"/>
+			<point x="306" y="471" type="line"/>
+			<point x="286" y="423"/>
+			<point x="263" y="377"/>
+			<point x="240" y="328" type="curve"/>
+			<point x="236" y="328" type="line"/>
+			<point x="214" y="377"/>
+			<point x="194" y="423"/>
+			<point x="173" y="471" type="curve"/>
+			<point x="88" y="656" type="line"/>
+			<point x="-1" y="656" type="line"/>
+			<point x="196" y="254" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 656 -20</string>
+							<string>vstem 196 84</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w476l1960l2800l280254l477656l390656l306471286423263377c240328l236328214377194423c173471l88656l-1656l196254</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Z_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Z_.glif
new file mode 100644
index 000000000..337fc1b0a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/Z_.glif
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="Z" format="2">
+	<unicode hex="005A"/>
+	<advance width="539"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="45" y="0" type="line"/>
+			<point x="497" y="0" type="line"/>
+			<point x="497" y="71" type="line"/>
+			<point x="148" y="71" type="line"/>
+			<point x="494" y="607" type="line"/>
+			<point x="494" y="656" type="line"/>
+			<point x="76" y="656" type="line"/>
+			<point x="76" y="586" type="line"/>
+			<point x="390" y="586" type="line"/>
+			<point x="45" y="50" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 71</string>
+							<string>hstem 586 70</string>
+							<string>vstem 45 452</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w539l450l4970l49771l14871l494607l494656l76656l76586l390586l4550</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/_notdef.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/_notdef.glif
new file mode 100644
index 000000000..c3df63af9
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/_notdef.glif
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name=".notdef" format="2">
+	<advance width="653"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="89" y="0" type="line"/>
+			<point x="565" y="0" type="line"/>
+			<point x="565" y="660" type="line"/>
+			<point x="89" y="660" type="line"/>
+		</contour>
+		<contour>
+			<point x="154" y="110" type="line"/>
+			<point x="154" y="572" type="line"/>
+			<point x="281" y="340" type="line"/>
+		</contour>
+		<contour>
+			<point x="372" y="340" type="line"/>
+			<point x="498" y="572" type="line"/>
+			<point x="498" y="110" type="line"/>
+		</contour>
+		<contour>
+			<point x="197" y="58" type="line"/>
+			<point x="271" y="190" type="line"/>
+			<point x="325" y="293" type="line"/>
+			<point x="329" y="293" type="line"/>
+			<point x="381" y="190" type="line"/>
+			<point x="454" y="58" type="line"/>
+		</contour>
+		<contour>
+			<point x="325" y="387" type="line"/>
+			<point x="275" y="481" type="line"/>
+			<point x="209" y="600" type="line"/>
+			<point x="444" y="600" type="line"/>
+			<point x="378" y="481" type="line"/>
+			<point x="329" y="387" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 58</string>
+							<string>hstem 600 60</string>
+							<string>vstem 89 65</string>
+							<string>vstem 498 67</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>283ca2a4dcb237acdee4cb2bb677cbc5a9c9cc2fbaaede3cf9c07cc9dfbab8ad054b2308d5fcb76e7a42189d347a9fdff18e3d90ac096ed25e2a01975e3cd11d</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/a.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/a.glif
new file mode 100644
index 000000000..51df070e3
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/a.glif
@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="a" format="2">
+	<unicode hex="0061"/>
+	<advance width="512"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="58" y="126" type="curve"/>
+			<point x="58" y="39"/>
+			<point x="119" y="-12"/>
+			<point x="201" y="-12" type="curve"/>
+			<point name="hintSet0002" x="261" y="-12"/>
+			<point x="315" y="20"/>
+			<point x="362" y="58" type="curve"/>
+			<point x="364" y="58" type="line"/>
+			<point name="hintSet0004" x="371" y="0" type="line"/>
+			<point name="hintSet0005" x="439" y="0" type="line"/>
+			<point x="439" y="298" type="line"/>
+			<point x="439" y="419"/>
+			<point x="389" y="498"/>
+			<point x="270" y="498" type="curve"/>
+			<point x="192" y="498"/>
+			<point x="124" y="464"/>
+			<point x="79" y="435" type="curve"/>
+			<point x="112" y="378" type="line"/>
+			<point x="150" y="404"/>
+			<point x="200" y="430"/>
+			<point x="257" y="430" type="curve"/>
+			<point x="336" y="430"/>
+			<point x="357" y="370"/>
+			<point x="357" y="308" type="curve"/>
+			<point name="hintSet0012" x="150" y="285"/>
+			<point x="58" y="232"/>
+		</contour>
+		<contour>
+			<point x="139" y="132" type="curve"/>
+			<point x="139" y="194"/>
+			<point x="194" y="234"/>
+			<point x="357" y="254" type="curve"/>
+			<point x="357" y="119" type="line"/>
+			<point x="310" y="77"/>
+			<point x="271" y="54"/>
+			<point x="224" y="54" type="curve"/>
+			<point x="176" y="54"/>
+			<point x="139" y="77"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 430 68</string>
+							<string>vstem 58 81</string>
+							<string>vstem 357 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0002</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 430 68</string>
+							<string>vstem 58 81</string>
+							<string>vstem 367.5 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0004</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 430 68</string>
+							<string>vstem 58 81</string>
+							<string>vstem 367.5 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 430 68</string>
+							<string>vstem 58 81</string>
+							<string>vstem 357 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0012</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 430 68</string>
+							<string>vstem 58 81</string>
+							<string>vstem 357 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>de48cb1274dfe031af1f28bcccedf34f014209062b8f936b1e535dd834529c5c643d14d29e248ff751577b23228f85c21be6b084d394cc94007d5caffebb14cb</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/b.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/b.glif
new file mode 100644
index 000000000..eb843163a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/b.glif
@@ -0,0 +1,103 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="b" format="2">
+	<unicode hex="0062"/>
+	<advance width="555"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="0" type="line"/>
+			<point name="hintSet0001" x="148" y="0" type="line"/>
+			<point name="hintSet0002" x="155" y="48" type="line"/>
+			<point x="158" y="48" type="line"/>
+			<point x="201" y="10"/>
+			<point x="252" y="-12"/>
+			<point x="297" y="-12" type="curve"/>
+			<point x="408" y="-12"/>
+			<point x="507" y="85"/>
+			<point x="507" y="251" type="curve"/>
+			<point x="507" y="401"/>
+			<point x="440" y="498"/>
+			<point x="314" y="498" type="curve"/>
+			<point name="hintSet0007" x="260" y="498"/>
+			<point x="206" y="469"/>
+			<point x="162" y="430" type="curve"/>
+			<point x="164" y="518" type="line"/>
+			<point x="164" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+		<contour>
+			<point x="164" y="108" type="curve"/>
+			<point x="164" y="363" type="line"/>
+			<point x="210" y="406"/>
+			<point x="253" y="429"/>
+			<point x="294" y="429" type="curve"/>
+			<point x="386" y="429"/>
+			<point x="422" y="357"/>
+			<point x="422" y="250" type="curve"/>
+			<point x="422" y="130"/>
+			<point x="363" y="57"/>
+			<point x="283" y="57" type="curve"/>
+			<point x="251" y="57"/>
+			<point x="207" y="71"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0001</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 69.5</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0002</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 69.5</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0007</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>b92ccc277b1b8ff2f4786afbb30d49146118955c62540a4ee374410c792a7a09b643fbf7a1015d70aee0a6c13d2e1f9ac8579644470b8204077fa9e88d90bf17</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/c.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/c.glif
new file mode 100644
index 000000000..4563d70da
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/c.glif
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="c" format="2">
+	<unicode hex="0063"/>
+	<advance width="456"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="46" y="242" type="curve"/>
+			<point x="46" y="81"/>
+			<point x="145" y="-12"/>
+			<point x="274" y="-12" type="curve"/>
+			<point x="332" y="-12"/>
+			<point x="388" y="12"/>
+			<point x="432" y="51" type="curve"/>
+			<point x="395" y="105" type="line"/>
+			<point x="366" y="79"/>
+			<point x="327" y="56"/>
+			<point x="281" y="56" type="curve"/>
+			<point x="192" y="56"/>
+			<point x="131" y="131"/>
+			<point x="131" y="242" type="curve"/>
+			<point x="131" y="354"/>
+			<point x="195" y="430"/>
+			<point x="283" y="430" type="curve"/>
+			<point x="322" y="430"/>
+			<point x="352" y="412"/>
+			<point x="381" y="387" type="curve"/>
+			<point x="422" y="440" type="line"/>
+			<point x="389" y="471"/>
+			<point x="344" y="498"/>
+			<point x="280" y="498" type="curve"/>
+			<point x="155" y="498"/>
+			<point x="46" y="405"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 430 68</string>
+							<string>vstem 46 85</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>3e4fe6d317a3bf7dcab2360a956cee88dbbc68e9f5e902aa6404f0ed2419a14038e45abb0b9ff9cee5ece3e2a0d22378f9cec6172221bb7c879c03eb2da82bef</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/contents.plist b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/contents.plist
new file mode 100644
index 000000000..767e78f05
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/contents.plist
@@ -0,0 +1,132 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>.notdef</key>
+		<string>_notdef.glif</string>
+		<key>A</key>
+		<string>A_.glif</string>
+		<key>B</key>
+		<string>B_.glif</string>
+		<key>C</key>
+		<string>C_.glif</string>
+		<key>D</key>
+		<string>D_.glif</string>
+		<key>E</key>
+		<string>E_.glif</string>
+		<key>F</key>
+		<string>F_.glif</string>
+		<key>G</key>
+		<string>G_.glif</string>
+		<key>H</key>
+		<string>H_.glif</string>
+		<key>I</key>
+		<string>I_.glif</string>
+		<key>J</key>
+		<string>J_.glif</string>
+		<key>K</key>
+		<string>K_.glif</string>
+		<key>L</key>
+		<string>L_.glif</string>
+		<key>M</key>
+		<string>M_.glif</string>
+		<key>N</key>
+		<string>N_.glif</string>
+		<key>O</key>
+		<string>O_.glif</string>
+		<key>P</key>
+		<string>P_.glif</string>
+		<key>Q</key>
+		<string>Q_.glif</string>
+		<key>R</key>
+		<string>R_.glif</string>
+		<key>S</key>
+		<string>S_.glif</string>
+		<key>T</key>
+		<string>T_.glif</string>
+		<key>U</key>
+		<string>U_.glif</string>
+		<key>V</key>
+		<string>V_.glif</string>
+		<key>W</key>
+		<string>W_.glif</string>
+		<key>X</key>
+		<string>X_.glif</string>
+		<key>Y</key>
+		<string>Y_.glif</string>
+		<key>Z</key>
+		<string>Z_.glif</string>
+		<key>a</key>
+		<string>a.glif</string>
+		<key>b</key>
+		<string>b.glif</string>
+		<key>c</key>
+		<string>c.glif</string>
+		<key>d</key>
+		<string>d.glif</string>
+		<key>e</key>
+		<string>e.glif</string>
+		<key>eight</key>
+		<string>eight.glif</string>
+		<key>f</key>
+		<string>f.glif</string>
+		<key>five</key>
+		<string>five.glif</string>
+		<key>four</key>
+		<string>four.glif</string>
+		<key>g</key>
+		<string>g.glif</string>
+		<key>h</key>
+		<string>h.glif</string>
+		<key>i</key>
+		<string>i.glif</string>
+		<key>j</key>
+		<string>j.glif</string>
+		<key>k</key>
+		<string>k.glif</string>
+		<key>l</key>
+		<string>l.glif</string>
+		<key>m</key>
+		<string>m.glif</string>
+		<key>n</key>
+		<string>n.glif</string>
+		<key>nine</key>
+		<string>nine.glif</string>
+		<key>o</key>
+		<string>o.glif</string>
+		<key>one</key>
+		<string>one.glif</string>
+		<key>p</key>
+		<string>p.glif</string>
+		<key>q</key>
+		<string>q.glif</string>
+		<key>r</key>
+		<string>r.glif</string>
+		<key>s</key>
+		<string>s.glif</string>
+		<key>seven</key>
+		<string>seven.glif</string>
+		<key>six</key>
+		<string>six.glif</string>
+		<key>t</key>
+		<string>t.glif</string>
+		<key>three</key>
+		<string>three.glif</string>
+		<key>two</key>
+		<string>two.glif</string>
+		<key>u</key>
+		<string>u.glif</string>
+		<key>v</key>
+		<string>v.glif</string>
+		<key>w</key>
+		<string>w.glif</string>
+		<key>x</key>
+		<string>x.glif</string>
+		<key>y</key>
+		<string>y.glif</string>
+		<key>z</key>
+		<string>z.glif</string>
+		<key>zero</key>
+		<string>zero.glif</string>
+	</dict>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/d.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/d.glif
new file mode 100644
index 000000000..7d8e51a6f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/d.glif
@@ -0,0 +1,115 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="d" format="2">
+	<unicode hex="0064"/>
+	<advance width="555"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="47" y="242" type="curve"/>
+			<point x="47" y="80"/>
+			<point x="126" y="-12"/>
+			<point x="248" y="-12" type="curve"/>
+			<point name="hintSet0002" x="305" y="-12"/>
+			<point x="357" y="20"/>
+			<point x="395" y="57" type="curve"/>
+			<point x="398" y="57" type="line"/>
+			<point name="hintSet0004" x="405" y="0" type="line"/>
+			<point name="hintSet0005" x="473" y="0" type="line"/>
+			<point x="473" y="712" type="line"/>
+			<point x="390" y="712" type="line"/>
+			<point x="390" y="525" type="line"/>
+			<point x="394" y="442" type="line"/>
+			<point x="351" y="477"/>
+			<point x="314" y="498"/>
+			<point x="258" y="498" type="curve"/>
+			<point name="hintSet0011" x="147" y="498"/>
+			<point x="47" y="400"/>
+		</contour>
+		<contour>
+			<point x="132" y="243" type="curve"/>
+			<point x="132" y="354"/>
+			<point x="194" y="429"/>
+			<point x="272" y="429" type="curve"/>
+			<point x="312" y="429"/>
+			<point x="349" y="415"/>
+			<point x="390" y="378" type="curve"/>
+			<point x="390" y="124" type="line"/>
+			<point x="350" y="79"/>
+			<point x="311" y="57"/>
+			<point x="266" y="57" type="curve"/>
+			<point x="181" y="57"/>
+			<point x="132" y="127"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 390 83</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0002</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 401.5 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0004</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 401.5 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 390 83</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0011</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 390 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>53d6426ae30aa2c6cf8e378d68b16793b3e09389bcdc1b05623dab9bf2317091c5cf94f0ee4cdd2d60f0aded2940984eb8d7eefce38cabbfbd4e31fa4a7ac178</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/e.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/e.glif
new file mode 100644
index 000000000..55502e47a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/e.glif
@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="e" format="2">
+	<unicode hex="0065"/>
+	<advance width="496"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="46" y="242" type="curve"/>
+			<point x="46" y="83"/>
+			<point x="149" y="-12"/>
+			<point x="279" y="-12" type="curve"/>
+			<point x="345" y="-12"/>
+			<point x="397" y="11"/>
+			<point x="439" y="38" type="curve"/>
+			<point x="410" y="92" type="line"/>
+			<point x="374" y="69"/>
+			<point x="335" y="54"/>
+			<point x="289" y="54" type="curve"/>
+			<point name="hintSet0005" x="196" y="54"/>
+			<point x="133" y="120"/>
+			<point x="127" y="225" type="curve"/>
+			<point x="455" y="225" type="line"/>
+			<point x="457" y="237"/>
+			<point x="458" y="253"/>
+			<point x="458" y="270" type="curve"/>
+			<point x="458" y="409"/>
+			<point x="388" y="498"/>
+			<point x="264" y="498" type="curve"/>
+			<point name="hintSet0009" x="153" y="498"/>
+			<point x="46" y="401"/>
+		</contour>
+		<contour>
+			<point x="126" y="279" type="line"/>
+			<point x="136" y="377"/>
+			<point x="198" y="433"/>
+			<point x="266" y="433" type="curve"/>
+			<point x="342" y="433"/>
+			<point x="386" y="378"/>
+			<point x="386" y="279" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 225 54</string>
+							<string>hstem 433 65</string>
+							<string>vstem 46 80</string>
+							<string>vstem 386 72</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 225 54</string>
+							<string>hstem 433 65</string>
+							<string>vstem 46 81</string>
+							<string>vstem 386 72</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0009</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 225 54</string>
+							<string>hstem 433 65</string>
+							<string>vstem 46 80</string>
+							<string>vstem 386 72</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>6aa98885a0e0f8d0f16200bd3466e4347169335ae28f52f23f3312b64c6a076353445948e2753eb9a222b4a12fe1ab193508b86856d6b822a47e8401c07f9564</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/eight.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/eight.glif
new file mode 100644
index 000000000..76a0287a9
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/eight.glif
@@ -0,0 +1,130 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="eight" format="2">
+	<unicode hex="0038"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="115" y="171" type="curve"/>
+			<point x="115" y="229"/>
+			<point x="153" y="276"/>
+			<point x="204" y="310" type="curve"/>
+			<point x="296" y="273"/>
+			<point x="377" y="243"/>
+			<point x="377" y="161" type="curve"/>
+			<point x="377" y="95"/>
+			<point x="326" y="49"/>
+			<point x="252" y="49" type="curve"/>
+			<point x="174" y="49"/>
+			<point x="115" y="100"/>
+		</contour>
+		<contour>
+			<point name="hintSet0005" x="295" y="348" type="curve"/>
+			<point x="218" y="378"/>
+			<point x="148" y="410"/>
+			<point x="148" y="486" type="curve"/>
+			<point x="148" y="548"/>
+			<point x="192" y="589"/>
+			<point x="251" y="589" type="curve"/>
+			<point x="321" y="589"/>
+			<point x="362" y="539"/>
+			<point x="362" y="476" type="curve"/>
+			<point x="362" y="429"/>
+			<point x="338" y="386"/>
+		</contour>
+		<contour>
+			<point name="hintSet0010" x="41" y="163" type="curve"/>
+			<point x="41" y="62"/>
+			<point x="130" y="-12"/>
+			<point x="250" y="-12" type="curve"/>
+			<point x="374" y="-12"/>
+			<point x="456" y="63"/>
+			<point x="456" y="158" type="curve"/>
+			<point x="456" y="244"/>
+			<point x="402" y="289"/>
+			<point x="345" y="322" type="curve"/>
+			<point x="345" y="326" type="line"/>
+			<point name="hintSet0015" x="384" y="356"/>
+			<point x="433" y="413"/>
+			<point x="433" y="480" type="curve"/>
+			<point x="433" y="579"/>
+			<point x="364" y="650"/>
+			<point x="253" y="650" type="curve"/>
+			<point x="150" y="650"/>
+			<point x="72" y="584"/>
+			<point x="72" y="486" type="curve"/>
+			<point x="72" y="419"/>
+			<point x="114" y="372"/>
+			<point x="161" y="339" type="curve"/>
+			<point x="161" y="335" type="line"/>
+			<point name="hintSet0020" x="101" y="303"/>
+			<point x="41" y="246"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 61</string>
+							<string>hstem 589 61</string>
+							<string>vstem 41 74</string>
+							<string>vstem 377 79</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 61</string>
+							<string>hstem 589 61</string>
+							<string>vstem 72 76</string>
+							<string>vstem 362 71</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0010</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 61</string>
+							<string>hstem 589 61</string>
+							<string>vstem 41 74</string>
+							<string>vstem 377 79</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0015</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 61</string>
+							<string>hstem 589 61</string>
+							<string>vstem 72 76</string>
+							<string>vstem 362 71</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0020</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 61</string>
+							<string>hstem 589 61</string>
+							<string>vstem 41 74</string>
+							<string>vstem 377 79</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>ef0660592f45c493b53cd0ce2f15398d8f62c8e0031c7fc496699d69b00c00e46a409a9cd8adea77904f6be95d921ce5270a62056668c780b537ad6a4caf8344</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/f.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/f.glif
new file mode 100644
index 000000000..9572f2c71
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/f.glif
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="f" format="2">
+	<unicode hex="0066"/>
+	<advance width="292"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="319" y="708" type="line"/>
+			<point x="297" y="717"/>
+			<point x="268" y="724"/>
+			<point x="238" y="724" type="curve"/>
+			<point x="141" y="724"/>
+			<point x="96" y="662"/>
+			<point x="96" y="563" type="curve"/>
+			<point x="96" y="486" type="line"/>
+			<point x="30" y="481" type="line"/>
+			<point x="30" y="419" type="line"/>
+			<point x="96" y="419" type="line"/>
+			<point x="96" y="0" type="line"/>
+			<point x="178" y="0" type="line"/>
+			<point x="178" y="419" type="line"/>
+			<point name="hintSet0010" x="281" y="419" type="line"/>
+			<point x="281" y="486" type="line"/>
+			<point name="hintSet0012" x="178" y="486" type="line"/>
+			<point x="178" y="563" type="line"/>
+			<point x="178" y="625"/>
+			<point x="200" y="657"/>
+			<point x="246" y="657" type="curve"/>
+			<point x="264" y="657"/>
+			<point x="283" y="653"/>
+			<point x="301" y="645" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 419 67</string>
+							<string>hstem 657 67</string>
+							<string>vstem 96 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0010</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 419 67</string>
+							<string>hstem 657 67</string>
+							<string>vstem 96 185</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0012</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 419 67</string>
+							<string>hstem 657 67</string>
+							<string>vstem 96 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>82c6633fdaf062e1968b783f8a75e660fd973d741f88fd2f07e4bb5c8f70a4e7224d7559584ce47916598c92b39cb36ff07133e35f20d275fdf55a8dfd662bd2</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/five.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/five.glif
new file mode 100644
index 000000000..e8b3dc45d
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/five.glif
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="five" format="2">
+	<unicode hex="0035"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="25" y="75" type="line"/>
+			<point x="69" y="31"/>
+			<point x="132" y="-12"/>
+			<point x="234" y="-12" type="curve"/>
+			<point x="345" y="-12"/>
+			<point x="449" y="66"/>
+			<point x="449" y="204" type="curve"/>
+			<point x="449" y="342"/>
+			<point x="360" y="404"/>
+			<point x="251" y="404" type="curve"/>
+			<point x="212" y="404"/>
+			<point x="183" y="394"/>
+			<point x="153" y="378" type="curve"/>
+			<point x="170" y="567" type="line"/>
+			<point x="417" y="567" type="line"/>
+			<point x="417" y="638" type="line"/>
+			<point x="98" y="638" type="line"/>
+			<point x="77" y="331" type="line"/>
+			<point x="121" y="303" type="line"/>
+			<point x="159" y="328"/>
+			<point x="186" y="342"/>
+			<point x="230" y="342" type="curve"/>
+			<point x="312" y="342"/>
+			<point x="366" y="290"/>
+			<point x="366" y="202" type="curve"/>
+			<point x="366" y="113"/>
+			<point x="304" y="56"/>
+			<point x="226" y="56" type="curve"/>
+			<point x="151" y="56"/>
+			<point x="103" y="91"/>
+			<point x="65" y="129" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 342 62</string>
+							<string>hstem 567 71</string>
+							<string>vstem 366 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>f77f171985b4384a3d800540446f1981f117e98f5ead4fba888e096f0796769197ac00300311429d1be21f98be39b50391e8cdb59cd2b1d7d8ca7bc462aea572</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/four.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/four.glif
new file mode 100644
index 000000000..7dccc95f6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/four.glif
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="four" format="2">
+	<unicode hex="0034"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="104" y="242" type="line"/>
+			<point x="253" y="460" type="line"/>
+			<point x="271" y="491"/>
+			<point x="289" y="519"/>
+			<point x="305" y="550" type="curve"/>
+			<point x="309" y="550" type="line"/>
+			<point x="307" y="516"/>
+			<point x="304" y="461"/>
+			<point x="304" y="427" type="curve"/>
+			<point x="304" y="242" type="line"/>
+		</contour>
+		<contour>
+			<point x="469" y="242" type="line"/>
+			<point x="382" y="242" type="line"/>
+			<point x="382" y="638" type="line"/>
+			<point x="290" y="638" type="line"/>
+			<point x="17" y="230" type="line"/>
+			<point x="17" y="176" type="line"/>
+			<point x="304" y="176" type="line"/>
+			<point x="304" y="0" type="line"/>
+			<point x="382" y="0" type="line"/>
+			<point x="382" y="176" type="line"/>
+			<point x="469" y="176" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 176 66</string>
+							<string>hstem 550 88</string>
+							<string>vstem 304 78</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>7230c1dedca0df99c20f65c131180d5b64ac1b5334974db98fe8b4b253ff651e65e3b3bcf79f57c09c25547c34523479943930429bc6ab313178b1d39afc823e</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/g.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/g.glif
new file mode 100644
index 000000000..499e31b23
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/g.glif
@@ -0,0 +1,218 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="g" format="2">
+	<unicode hex="0067"/>
+	<advance width="504"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="117" y="-82" type="curve"/>
+			<point x="117" y="-54"/>
+			<point x="132" y="-25"/>
+			<point x="167" y="0" type="curve"/>
+			<point name="hintSet0002" x="188" y="-6"/>
+			<point x="211" y="-8"/>
+			<point x="230" y="-8" type="curve"/>
+			<point x="314" y="-8" type="line"/>
+			<point x="377" y="-8"/>
+			<point x="412" y="-23"/>
+			<point x="412" y="-68" type="curve"/>
+			<point x="412" y="-119"/>
+			<point x="351" y="-167"/>
+			<point x="258" y="-167" type="curve"/>
+			<point name="hintSet0006" x="170" y="-167"/>
+			<point x="117" y="-134"/>
+		</contour>
+		<contour>
+			<point x="45" y="-93" type="curve"/>
+			<point x="45" y="-177"/>
+			<point x="127" y="-224"/>
+			<point x="246" y="-224" type="curve"/>
+			<point name="hintSet0009" x="397" y="-224"/>
+			<point x="492" y="-146"/>
+			<point x="492" y="-56" type="curve"/>
+			<point x="492" y="25"/>
+			<point x="435" y="60"/>
+			<point x="322" y="60" type="curve"/>
+			<point x="228" y="60" type="line"/>
+			<point x="162" y="60"/>
+			<point x="142" y="82"/>
+			<point x="142" y="113" type="curve"/>
+			<point x="142" y="140"/>
+			<point x="156" y="156"/>
+			<point x="173" y="171" type="curve"/>
+			<point x="195" y="160"/>
+			<point x="222" y="154"/>
+			<point x="246" y="154" type="curve"/>
+			<point name="hintSet0015" x="345" y="154"/>
+			<point x="424" y="219"/>
+			<point x="424" y="323" type="curve"/>
+			<point x="424" y="364"/>
+			<point x="407" y="401"/>
+			<point x="384" y="423" type="curve"/>
+			<point x="484" y="423" type="line"/>
+			<point x="484" y="486" type="line"/>
+			<point x="315" y="486" type="line"/>
+			<point name="hintSet0020" x="297" y="493"/>
+			<point x="273" y="498"/>
+			<point x="246" y="498" type="curve"/>
+			<point x="147" y="498"/>
+			<point x="63" y="431"/>
+			<point x="63" y="325" type="curve"/>
+			<point x="63" y="267"/>
+			<point x="94" y="220"/>
+			<point x="126" y="194" type="curve"/>
+			<point x="126" y="190" type="line"/>
+			<point name="hintSet0024" x="101" y="173"/>
+			<point x="73" y="141"/>
+			<point x="73" y="100" type="curve"/>
+			<point x="73" y="62"/>
+			<point x="92" y="36"/>
+			<point x="116" y="21" type="curve"/>
+			<point x="116" y="17" type="line"/>
+			<point name="hintSet0027" x="72" y="-13"/>
+			<point x="45" y="-52"/>
+		</contour>
+		<contour>
+			<point name="hintSet0028" x="246" y="209" type="curve"/>
+			<point x="190" y="209"/>
+			<point x="143" y="254"/>
+			<point x="143" y="325" type="curve"/>
+			<point x="143" y="396"/>
+			<point x="189" y="438"/>
+			<point x="246" y="438" type="curve"/>
+			<point x="303" y="438"/>
+			<point x="349" y="396"/>
+			<point x="349" y="325" type="curve"/>
+			<point x="349" y="254"/>
+			<point x="302" y="209"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem 21 -21</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 45 72</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0002</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem -8 68</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 63 80</string>
+							<string>vstem 412 80</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0006</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem 21 -21</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 45 72</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0009</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem -8 68</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 73 69</string>
+							<string>vstem 412 80</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0015</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem -8 68</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 63 80</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0020</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem -8 68</string>
+							<string>hstem 154 55</string>
+							<string>hstem 438 60</string>
+							<string>vstem 63 80</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0024</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem -8 68</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 73 69</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0027</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem 21 -21</string>
+							<string>hstem 154 55</string>
+							<string>hstem 423 63</string>
+							<string>vstem 45 72</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0028</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -224 57</string>
+							<string>hstem -8 68</string>
+							<string>hstem 154 55</string>
+							<string>hstem 438 60</string>
+							<string>vstem 63 80</string>
+							<string>vstem 349 75</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>1b4b8136ce1d18bb3a722fe32e3a56f4e9aefce33d5f59e344941604f306cfb9dda1cb45dafd1e46f8c5ef44c7d191eded78b21f3c795088bab1a1622fe0abc7</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/h.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/h.glif
new file mode 100644
index 000000000..ece392ea8
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/h.glif
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="h" format="2">
+	<unicode hex="0068"/>
+	<advance width="544"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="352" type="line"/>
+			<point x="213" y="401"/>
+			<point x="247" y="427"/>
+			<point x="297" y="427" type="curve"/>
+			<point x="361" y="427"/>
+			<point x="389" y="388"/>
+			<point x="389" y="297" type="curve"/>
+			<point x="389" y="0" type="line"/>
+			<point x="471" y="0" type="line"/>
+			<point x="471" y="308" type="line"/>
+			<point x="471" y="432"/>
+			<point x="425" y="498"/>
+			<point x="323" y="498" type="curve"/>
+			<point x="256" y="498"/>
+			<point x="207" y="462"/>
+			<point x="161" y="418" type="curve"/>
+			<point x="164" y="518" type="line"/>
+			<point x="164" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 427 71</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 389 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>07eb4e21c0e691cd448cdd6b84bea1413073adb795366128cde9ec67bd294fceb9bd06554dfd49d32fca9ac7842b69160c8f12f90d8fe79ce26e1740456b9432</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/i.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/i.glif
new file mode 100644
index 000000000..fd0e4491f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/i.glif
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="i" format="2">
+	<unicode hex="0069"/>
+	<advance width="246"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="124" y="586" type="curve"/>
+			<point x="156" y="586"/>
+			<point x="181" y="608"/>
+			<point x="181" y="639" type="curve"/>
+			<point x="181" y="671"/>
+			<point x="156" y="692"/>
+			<point x="124" y="692" type="curve"/>
+			<point x="92" y="692"/>
+			<point x="67" y="671"/>
+			<point x="67" y="639" type="curve"/>
+			<point x="67" y="608"/>
+			<point x="92" y="586"/>
+		</contour>
+		<contour>
+			<point name="hintSet0005" x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="486" type="line"/>
+			<point x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>hstem 586 106</string>
+							<string>vstem 67 114</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>hstem 586 106</string>
+							<string>vstem 82 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w246c124586156586181608c181639181671156692c1246929269267671c676396760892586l820l1640l164486l82486</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/j.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/j.glif
new file mode 100644
index 000000000..40ec0d7c4
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/j.glif
@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="j" format="2">
+	<unicode hex="006A"/>
+	<advance width="247"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="83" y="-55" type="line"/>
+			<point x="83" y="-114"/>
+			<point x="71" y="-150"/>
+			<point x="23" y="-150" type="curve"/>
+			<point x="6" y="-150"/>
+			<point x="-11" y="-146"/>
+			<point x="-23" y="-142" type="curve"/>
+			<point x="-40" y="-204" type="line"/>
+			<point x="-23" y="-211"/>
+			<point x="2" y="-217"/>
+			<point x="32" y="-217" type="curve"/>
+			<point x="129" y="-217"/>
+			<point x="165" y="-154"/>
+			<point x="165" y="-55" type="curve"/>
+			<point x="165" y="486" type="line"/>
+			<point x="83" y="486" type="line"/>
+		</contour>
+		<contour>
+			<point name="hintSet0008" x="125" y="586" type="curve"/>
+			<point x="156" y="586"/>
+			<point x="181" y="608"/>
+			<point x="181" y="639" type="curve"/>
+			<point x="181" y="671"/>
+			<point x="156" y="692"/>
+			<point x="125" y="692" type="curve"/>
+			<point x="93" y="692"/>
+			<point x="68" y="671"/>
+			<point x="68" y="639" type="curve"/>
+			<point x="68" y="608"/>
+			<point x="93" y="586"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -217 67</string>
+							<string>hstem 486 -20</string>
+							<string>hstem 586 106</string>
+							<string>vstem 83 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0008</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -217 67</string>
+							<string>hstem 486 -20</string>
+							<string>hstem 586 106</string>
+							<string>vstem 68 113</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>a398897c5d7d04001a2badd48c884438a0538fed270b8f39d0a052c0445b14e631ff80bf8863a21471bdba4baed35e1e6419028b07aec6e51b10dc2c76a075a4</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/k.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/k.glif
new file mode 100644
index 000000000..73e90acab
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/k.glif
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="k" format="2">
+	<unicode hex="006B"/>
+	<advance width="495"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="0" type="line"/>
+			<point x="163" y="0" type="line"/>
+			<point x="163" y="128" type="line"/>
+			<point x="254" y="234" type="line"/>
+			<point x="396" y="0" type="line"/>
+			<point x="486" y="0" type="line"/>
+			<point x="301" y="291" type="line"/>
+			<point x="464" y="486" type="line"/>
+			<point x="373" y="486" type="line"/>
+			<point x="166" y="230" type="line"/>
+			<point x="163" y="230" type="line"/>
+			<point x="163" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 81</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w495l820l1630l163128l254234l3960l4860l301291l464486l373486l166230l163230l163712l82712</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/l.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/l.glif
new file mode 100644
index 000000000..2ad03e083
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/l.glif
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="l" format="2">
+	<unicode hex="006C"/>
+	<advance width="255"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="98" type="line"/>
+			<point name="hintSet0001" x="82" y="27"/>
+			<point x="107" y="-12"/>
+			<point x="169" y="-12" type="curve"/>
+			<point x="191" y="-12"/>
+			<point x="205" y="-9"/>
+			<point x="216" y="-4" type="curve"/>
+			<point x="205" y="58" type="line"/>
+			<point x="196" y="56"/>
+			<point x="192" y="56"/>
+			<point x="187" y="56" type="curve"/>
+			<point x="175" y="56"/>
+			<point x="164" y="66"/>
+			<point x="164" y="92" type="curve"/>
+			<point x="164" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 17 -21</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0001</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 712 -20</string>
+							<string>vstem 82 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w255l82988227107-12c169-12191-12205-9c216-4l205581965619256c187561755616466c16492l164712l82712</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/layerinfo.plist b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/layerinfo.plist
new file mode 100644
index 000000000..aa5f6f5fe
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/layerinfo.plist
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>lib</key>
+		<dict>
+			<key>org.unifiedfontobject.normalizer.imageReferences</key>
+			<dict>
+			</dict>
+		</dict>
+	</dict>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/m.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/m.glif
new file mode 100644
index 000000000..831f4270a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/m.glif
@@ -0,0 +1,105 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="m" format="2">
+	<unicode hex="006D"/>
+	<advance width="829"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="352" type="line"/>
+			<point x="209" y="402"/>
+			<point x="250" y="427"/>
+			<point x="286" y="427" type="curve"/>
+			<point x="348" y="427"/>
+			<point x="377" y="388"/>
+			<point x="377" y="297" type="curve"/>
+			<point x="377" y="0" type="line"/>
+			<point x="459" y="0" type="line"/>
+			<point x="459" y="352" type="line"/>
+			<point x="504" y="402"/>
+			<point x="543" y="427"/>
+			<point x="581" y="427" type="curve"/>
+			<point x="642" y="427"/>
+			<point x="671" y="388"/>
+			<point x="671" y="297" type="curve"/>
+			<point x="671" y="0" type="line"/>
+			<point x="753" y="0" type="line"/>
+			<point x="753" y="308" type="line"/>
+			<point x="753" y="432"/>
+			<point x="705" y="498"/>
+			<point x="605" y="498" type="curve"/>
+			<point x="546" y="498"/>
+			<point x="496" y="460"/>
+			<point x="445" y="405" type="curve"/>
+			<point x="425" y="463"/>
+			<point x="385" y="498"/>
+			<point x="311" y="498" type="curve"/>
+			<point name="hintSet0016" x="253" y="498"/>
+			<point x="202" y="462"/>
+			<point x="160" y="416" type="curve"/>
+			<point x="157" y="416" type="line"/>
+			<point name="hintSet0018" x="150" y="486" type="line"/>
+			<point name="hintSet0019" x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 427 71</string>
+							<string>vstem 82 82</string>
+							<string>vstem 377 82</string>
+							<string>vstem 671 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0016</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 427 71</string>
+							<string>vstem 82 71.5</string>
+							<string>vstem 377 82</string>
+							<string>vstem 671 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0018</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 71.5</string>
+							<string>vstem 377 82</string>
+							<string>vstem 671 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0019</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 377 82</string>
+							<string>vstem 671 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>3b9e4f00ba853ad386333eb5397d3500c2249a1aee7560539f19ae61388dc968b4b8fbf041ac6df813d780fac7475492e479876b7b6b65c305a4d1f1e769f78b</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/n.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/n.glif
new file mode 100644
index 000000000..a881a08a3
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/n.glif
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="n" format="2">
+	<unicode hex="006E"/>
+	<advance width="547"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="352" type="line"/>
+			<point x="213" y="401"/>
+			<point x="247" y="427"/>
+			<point x="297" y="427" type="curve"/>
+			<point x="361" y="427"/>
+			<point x="389" y="388"/>
+			<point x="389" y="297" type="curve"/>
+			<point x="389" y="0" type="line"/>
+			<point x="471" y="0" type="line"/>
+			<point x="471" y="308" type="line"/>
+			<point x="471" y="432"/>
+			<point x="425" y="498"/>
+			<point x="323" y="498" type="curve"/>
+			<point name="hintSet0009" x="256" y="498"/>
+			<point x="206" y="462"/>
+			<point x="160" y="416" type="curve"/>
+			<point x="157" y="416" type="line"/>
+			<point name="hintSet0011" x="150" y="486" type="line"/>
+			<point name="hintSet0012" x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 427 71</string>
+							<string>vstem 82 82</string>
+							<string>vstem 389 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0009</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 427 71</string>
+							<string>vstem 82 71.5</string>
+							<string>vstem 389 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0011</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 71.5</string>
+							<string>vstem 389 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0012</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 389 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>4dacebc2e4a36de6894e4266ab6f54942efba0079d5308f92c1e0b8b9aaefe3759645b28c80aff54e2042af9684e83326a5c8801b4f46439ca1ae1b6f1609afe</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/nine.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/nine.glif
new file mode 100644
index 000000000..be568d85b
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/nine.glif
@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="nine" format="2">
+	<unicode hex="0039"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="235" y="310" type="curve"/>
+			<point x="156" y="310"/>
+			<point x="117" y="362"/>
+			<point x="117" y="445" type="curve"/>
+			<point x="117" y="529"/>
+			<point x="166" y="585"/>
+			<point x="228" y="585" type="curve"/>
+			<point x="309" y="585"/>
+			<point x="358" y="519"/>
+			<point x="369" y="395" type="curve"/>
+			<point x="326" y="334"/>
+			<point x="276" y="310"/>
+		</contour>
+		<contour>
+			<point x="51" y="55" type="line"/>
+			<point x="86" y="17"/>
+			<point x="137" y="-12"/>
+			<point x="205" y="-12" type="curve"/>
+			<point x="332" y="-12"/>
+			<point x="448" y="87"/>
+			<point x="448" y="343" type="curve"/>
+			<point x="448" y="548"/>
+			<point x="354" y="650"/>
+			<point x="228" y="650" type="curve"/>
+			<point x="126" y="650"/>
+			<point x="40" y="567"/>
+			<point x="40" y="445" type="curve"/>
+			<point x="40" y="314"/>
+			<point x="111" y="248"/>
+			<point x="221" y="248" type="curve"/>
+			<point x="274" y="248"/>
+			<point x="331" y="279"/>
+			<point x="371" y="330" type="curve"/>
+			<point x="368" y="126"/>
+			<point x="292" y="56"/>
+			<point x="202" y="56" type="curve"/>
+			<point x="162" y="56"/>
+			<point x="123" y="76"/>
+			<point x="97" y="107" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 248 62</string>
+							<string>hstem 585 65</string>
+							<string>vstem 40 77</string>
+							<string>vstem 371 77</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>624954a2e8e85eabe694968c1fe2f6e6b2552c76fd18a5047a705ea1242e714d9902fbc5e43e4137df586d1bd2e2c18e90081ad8e8e33a45987fb89e8eb00538</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/o.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/o.glif
new file mode 100644
index 000000000..4964a1409
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/o.glif
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="o" format="2">
+	<unicode hex="006F"/>
+	<advance width="542"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="46" y="242" type="curve"/>
+			<point x="46" y="81"/>
+			<point x="152" y="-12"/>
+			<point x="271" y="-12" type="curve"/>
+			<point x="390" y="-12"/>
+			<point x="496" y="81"/>
+			<point x="496" y="242" type="curve"/>
+			<point x="496" y="405"/>
+			<point x="390" y="498"/>
+			<point x="271" y="498" type="curve"/>
+			<point x="152" y="498"/>
+			<point x="46" y="405"/>
+		</contour>
+		<contour>
+			<point x="131" y="242" type="curve"/>
+			<point x="131" y="354"/>
+			<point x="188" y="430"/>
+			<point x="271" y="430" type="curve"/>
+			<point x="355" y="430"/>
+			<point x="411" y="354"/>
+			<point x="411" y="242" type="curve"/>
+			<point x="411" y="131"/>
+			<point x="355" y="56"/>
+			<point x="271" y="56" type="curve"/>
+			<point x="188" y="56"/>
+			<point x="131" y="131"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 430 68</string>
+							<string>vstem 46 85</string>
+							<string>vstem 411 85</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>2037c95e920bcdfd3f908084912058c14a44570b6c2c7a25ec29e43edc1ef2ed70cb35521349392e9eed4234d2049f8151f2daa880d68acfb81bb8ae72507a0e</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/one.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/one.glif
new file mode 100644
index 000000000..1c23c49fc
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/one.glif
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="one" format="2">
+	<unicode hex="0031"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="79" y="0" type="line"/>
+			<point x="439" y="0" type="line"/>
+			<point x="439" y="68" type="line"/>
+			<point x="307" y="68" type="line"/>
+			<point x="307" y="638" type="line"/>
+			<point x="244" y="638" type="line"/>
+			<point name="hintSet0006" x="209" y="617"/>
+			<point x="167" y="601"/>
+			<point x="109" y="591" type="curve"/>
+			<point x="109" y="538" type="line"/>
+			<point name="hintSet0008" x="225" y="538" type="line"/>
+			<point x="225" y="68" type="line"/>
+			<point x="79" y="68" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 68</string>
+							<string>hstem 538 100</string>
+							<string>vstem 225 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0006</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 68</string>
+							<string>hstem 538 100</string>
+							<string>vstem 109 198</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0008</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 68</string>
+							<string>hstem 538 100</string>
+							<string>vstem 225 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w497l790l4390l43968l30768l307638l244638209617167601c109591l109538l225538l22568l7968</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/p.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/p.glif
new file mode 100644
index 000000000..aebed9008
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/p.glif
@@ -0,0 +1,127 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="p" format="2">
+	<unicode hex="0070"/>
+	<advance width="555"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="162" y="44" type="line"/>
+			<point x="207" y="9"/>
+			<point x="252" y="-12"/>
+			<point x="297" y="-12" type="curve"/>
+			<point x="408" y="-12"/>
+			<point x="507" y="85"/>
+			<point x="507" y="250" type="curve"/>
+			<point x="507" y="401"/>
+			<point x="440" y="498"/>
+			<point x="315" y="498" type="curve"/>
+			<point name="hintSet0004" x="258" y="498"/>
+			<point x="204" y="467"/>
+			<point x="160" y="430" type="curve"/>
+			<point x="157" y="430" type="line"/>
+			<point name="hintSet0006" x="150" y="486" type="line"/>
+			<point name="hintSet0007" x="82" y="486" type="line"/>
+			<point x="82" y="-205" type="line"/>
+			<point x="164" y="-205" type="line"/>
+			<point x="164" y="-41" type="line"/>
+		</contour>
+		<contour>
+			<point x="164" y="108" type="curve"/>
+			<point name="hintSet0012" x="164" y="363" type="line"/>
+			<point x="212" y="406"/>
+			<point x="253" y="429"/>
+			<point x="294" y="429" type="curve"/>
+			<point x="386" y="429"/>
+			<point x="422" y="357"/>
+			<point x="422" y="250" type="curve"/>
+			<point x="422" y="130"/>
+			<point x="363" y="57"/>
+			<point x="283" y="57" type="curve"/>
+			<point name="hintSet0016" x="251" y="57"/>
+			<point x="208" y="71"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>vstem 82 82</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0004</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>vstem 82 71.5</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0006</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 71.5</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0007</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0012</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>vstem 82 82</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0016</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 82</string>
+							<string>vstem 422 85</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>6d450729f1a6079bb8d9954843e00919ca3d72c7f8782aaf0ed42f43a9701d93109d3a9338789321961977e93f641f127bfb9141ef3efdf59f1f6d84ccfe300a</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/q.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/q.glif
new file mode 100644
index 000000000..a64cb64af
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/q.glif
@@ -0,0 +1,115 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="q" format="2">
+	<unicode hex="0071"/>
+	<advance width="550"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="47" y="242" type="curve"/>
+			<point x="47" y="80"/>
+			<point x="126" y="-12"/>
+			<point x="248" y="-12" type="curve"/>
+			<point x="304" y="-12"/>
+			<point x="355" y="18"/>
+			<point x="394" y="54" type="curve"/>
+			<point x="390" y="-32" type="line"/>
+			<point x="390" y="-205" type="line"/>
+			<point x="473" y="-205" type="line"/>
+			<point name="hintSet0006" x="473" y="486" type="line"/>
+			<point name="hintSet0007" x="407" y="486" type="line"/>
+			<point name="hintSet0008" x="399" y="440" type="line"/>
+			<point x="397" y="440" type="line"/>
+			<point x="353" y="478"/>
+			<point x="314" y="498"/>
+			<point x="258" y="498" type="curve"/>
+			<point name="hintSet0011" x="147" y="498"/>
+			<point x="47" y="400"/>
+		</contour>
+		<contour>
+			<point x="132" y="243" type="curve"/>
+			<point x="132" y="354"/>
+			<point x="194" y="429"/>
+			<point x="272" y="429" type="curve"/>
+			<point x="312" y="429"/>
+			<point x="349" y="415"/>
+			<point x="390" y="378" type="curve"/>
+			<point x="390" y="124" type="line"/>
+			<point x="350" y="79"/>
+			<point x="311" y="57"/>
+			<point x="266" y="57" type="curve"/>
+			<point x="181" y="57"/>
+			<point x="132" y="127"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>vstem 47 85</string>
+							<string>vstem 390 83</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0006</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 390 83</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0007</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 47 85</string>
+							<string>vstem 403 70</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0008</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>vstem 47 85</string>
+							<string>vstem 403 70</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0011</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -184 -21</string>
+							<string>hstem -12 69</string>
+							<string>hstem 429 69</string>
+							<string>vstem 47 85</string>
+							<string>vstem 390 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>d1a20d9995f400e77024d8da1f777ccfc29d009a03e611d4629982d2782edc0c74fac0cc08cfb05a6a473abdb2963e3a2b50e6d30428f48cd3834b5003881639</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/r.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/r.glif
new file mode 100644
index 000000000..0ad68606a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/r.glif
@@ -0,0 +1,90 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="r" format="2">
+	<unicode hex="0072"/>
+	<advance width="347"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="312" type="line"/>
+			<point x="197" y="394"/>
+			<point x="246" y="424"/>
+			<point x="287" y="424" type="curve"/>
+			<point x="307" y="424"/>
+			<point x="318" y="421"/>
+			<point x="334" y="416" type="curve"/>
+			<point name="hintSet0005" x="350" y="488" type="line"/>
+			<point name="hintSet0006" x="334" y="495"/>
+			<point x="319" y="498"/>
+			<point x="298" y="498" type="curve"/>
+			<point x="243" y="498"/>
+			<point x="193" y="459"/>
+			<point x="160" y="398" type="curve"/>
+			<point x="157" y="398" type="line"/>
+			<point name="hintSet0009" x="150" y="486" type="line"/>
+			<point name="hintSet0010" x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 424 74</string>
+							<string>vstem 82 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 488 -20</string>
+							<string>vstem 82 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0006</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 424 74</string>
+							<string>vstem 82 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0009</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0010</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 82 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w347l820l1640l164312197394246424c287424307424318421c334416l350488334495319498c298498243498193459c160398l157398l150486l82486</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/s.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/s.glif
new file mode 100644
index 000000000..6ac03de00
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/s.glif
@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="s" format="2">
+	<unicode hex="0073"/>
+	<advance width="419"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="28" y="55" type="line"/>
+			<point x="74" y="17"/>
+			<point x="140" y="-12"/>
+			<point x="209" y="-12" type="curve"/>
+			<point x="324" y="-12"/>
+			<point x="387" y="54"/>
+			<point x="387" y="133" type="curve"/>
+			<point x="387" y="225"/>
+			<point x="309" y="254"/>
+			<point x="239" y="280" type="curve"/>
+			<point x="184" y="301"/>
+			<point x="131" y="318"/>
+			<point x="131" y="364" type="curve"/>
+			<point x="131" y="401"/>
+			<point x="159" y="434"/>
+			<point x="220" y="434" type="curve"/>
+			<point x="263" y="434"/>
+			<point x="298" y="416"/>
+			<point x="331" y="391" type="curve"/>
+			<point x="370" y="443" type="line"/>
+			<point x="333" y="473"/>
+			<point x="280" y="498"/>
+			<point x="219" y="498" type="curve"/>
+			<point x="114" y="498"/>
+			<point x="52" y="438"/>
+			<point x="52" y="360" type="curve"/>
+			<point x="52" y="278"/>
+			<point x="128" y="245"/>
+			<point x="197" y="220" type="curve"/>
+			<point x="250" y="200"/>
+			<point x="308" y="178"/>
+			<point x="308" y="128" type="curve"/>
+			<point x="308" y="86"/>
+			<point x="276" y="52"/>
+			<point x="212" y="52" type="curve"/>
+			<point x="154" y="52"/>
+			<point x="111" y="76"/>
+			<point x="69" y="110" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 64</string>
+							<string>hstem 434 64</string>
+							<string>vstem 52 79</string>
+							<string>vstem 308 79</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>7fd2b86537597dcc96d8ace3e8130b479e6aa111fe881941fc608d8a33d6ba55054227577bc12c03eac1616e29d3b106219bc5c10d0208b2414a901392aca743</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/seven.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/seven.glif
new file mode 100644
index 000000000..f50297c02
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/seven.glif
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="seven" format="2">
+	<unicode hex="0037"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="177" y="0" type="curve"/>
+			<point x="262" y="0" type="line"/>
+			<point x="273" y="249"/>
+			<point x="304" y="394"/>
+			<point x="455" y="587" type="curve"/>
+			<point x="455" y="638" type="line"/>
+			<point x="44" y="638" type="line"/>
+			<point x="44" y="567" type="line"/>
+			<point x="362" y="567" type="line"/>
+			<point x="236" y="392"/>
+			<point x="188" y="240"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 567 71</string>
+							<string>vstem 177 85</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w497c1770l2620273249304394c455587l455638l44638l44567l362567236392188240</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/six.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/six.glif
new file mode 100644
index 000000000..b2ca4498e
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/six.glif
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="six" format="2">
+	<unicode hex="0036"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="268" y="53" type="curve"/>
+			<point name="hintSet0001" x="187" y="53"/>
+			<point x="138" y="120"/>
+			<point x="128" y="244" type="curve"/>
+			<point x="171" y="304"/>
+			<point x="221" y="328"/>
+			<point x="261" y="328" type="curve"/>
+			<point x="340" y="328"/>
+			<point x="379" y="276"/>
+			<point x="379" y="193" type="curve"/>
+			<point name="hintSet0004" x="379" y="109"/>
+			<point x="331" y="53"/>
+		</contour>
+		<contour>
+			<point name="hintSet0005" x="445" y="582" type="line"/>
+			<point name="hintSet0006" x="409" y="621"/>
+			<point x="360" y="650"/>
+			<point x="291" y="650" type="curve"/>
+			<point x="164" y="650"/>
+			<point x="48" y="551"/>
+			<point x="48" y="295" type="curve"/>
+			<point x="48" y="90"/>
+			<point x="143" y="-12"/>
+			<point x="268" y="-12" type="curve"/>
+			<point x="371" y="-12"/>
+			<point x="457" y="71"/>
+			<point x="457" y="193" type="curve"/>
+			<point x="457" y="324"/>
+			<point x="385" y="390"/>
+			<point x="275" y="390" type="curve"/>
+			<point x="223" y="390"/>
+			<point x="166" y="359"/>
+			<point x="126" y="310" type="curve"/>
+			<point x="130" y="512"/>
+			<point x="205" y="581"/>
+			<point x="294" y="581" type="curve"/>
+			<point x="334" y="581"/>
+			<point x="373" y="562"/>
+			<point x="399" y="531" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 65</string>
+							<string>hstem 328 62</string>
+							<string>hstem 581 69</string>
+							<string>vstem 48 78</string>
+							<string>vstem 379 78</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0001</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 65</string>
+							<string>hstem 328 62</string>
+							<string>hstem 581 69</string>
+							<string>vstem 48 80</string>
+							<string>vstem 379 78</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0004</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 65</string>
+							<string>hstem 328 62</string>
+							<string>hstem 581 69</string>
+							<string>vstem 48 78</string>
+							<string>vstem 379 78</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 65</string>
+							<string>hstem 328 62</string>
+							<string>hstem 582 -20</string>
+							<string>vstem 48 78</string>
+							<string>vstem 379 78</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0006</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 65</string>
+							<string>hstem 328 62</string>
+							<string>hstem 581 69</string>
+							<string>vstem 48 78</string>
+							<string>vstem 379 78</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>fd7a526bd2bf1c598e866b370dd7922a889f04934dadd38642fd43769fcd873f5f8eee10e8762538401ba53ea4a64b314ae3be5e6478acff2d7f621bb3abce7c</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/t.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/t.glif
new file mode 100644
index 000000000..298bb3dea
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/t.glif
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="t" format="2">
+	<unicode hex="0074"/>
+	<advance width="338"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="96" y="150" type="line"/>
+			<point x="96" y="54"/>
+			<point x="131" y="-12"/>
+			<point x="235" y="-12" type="curve"/>
+			<point x="265" y="-12"/>
+			<point x="298" y="-3"/>
+			<point x="325" y="6" type="curve"/>
+			<point x="309" y="68" type="line"/>
+			<point x="293" y="62"/>
+			<point x="271" y="55"/>
+			<point x="254" y="55" type="curve"/>
+			<point x="198" y="55"/>
+			<point x="179" y="89"/>
+			<point x="179" y="149" type="curve"/>
+			<point x="179" y="419" type="line"/>
+			<point x="310" y="419" type="line"/>
+			<point x="310" y="486" type="line"/>
+			<point x="179" y="486" type="line"/>
+			<point x="179" y="622" type="line"/>
+			<point name="hintSet0011" x="110" y="622" type="line"/>
+			<point x="100" y="486" type="line"/>
+			<point name="hintSet0013" x="24" y="481" type="line"/>
+			<point x="24" y="419" type="line"/>
+			<point x="96" y="419" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 67</string>
+							<string>hstem 419 67</string>
+							<string>vstem 96 83</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0011</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 67</string>
+							<string>hstem 419 67</string>
+							<string>vstem 105 74</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0013</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 67</string>
+							<string>hstem 419 67</string>
+							<string>vstem 96 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>724ba96fc10dd34314ce80f33ee7f51f2cc5252585423f67c37b9737018e0db656596c66474da9f956188ee6a9fd41bb10512f18eb7995ef7cd2fd5296e6bb39</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/three.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/three.glif
new file mode 100644
index 000000000..925e8af1f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/three.glif
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="three" format="2">
+	<unicode hex="0033"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="26" y="78" type="line"/>
+			<point x="69" y="31"/>
+			<point x="134" y="-12"/>
+			<point x="236" y="-12" type="curve"/>
+			<point x="353" y="-12"/>
+			<point x="446" y="57"/>
+			<point x="446" y="170" type="curve"/>
+			<point x="446" y="258"/>
+			<point x="385" y="314"/>
+			<point x="308" y="332" type="curve"/>
+			<point x="308" y="336" type="line"/>
+			<point name="hintSet0005" x="377" y="362"/>
+			<point x="424" y="411"/>
+			<point x="424" y="488" type="curve"/>
+			<point x="424" y="591"/>
+			<point x="344" y="650"/>
+			<point x="233" y="650" type="curve"/>
+			<point x="158" y="650"/>
+			<point x="99" y="616"/>
+			<point x="50" y="570" type="curve"/>
+			<point x="94" y="518" type="line"/>
+			<point x="132" y="556"/>
+			<point x="177" y="583"/>
+			<point x="230" y="583" type="curve"/>
+			<point x="298" y="583"/>
+			<point x="340" y="544"/>
+			<point x="340" y="482" type="curve"/>
+			<point x="340" y="415"/>
+			<point x="295" y="363"/>
+			<point x="159" y="363" type="curve"/>
+			<point x="159" y="300" type="line"/>
+			<point name="hintSet0013" x="311" y="300"/>
+			<point x="363" y="249"/>
+			<point x="363" y="173" type="curve"/>
+			<point x="363" y="102"/>
+			<point x="308" y="56"/>
+			<point x="231" y="56" type="curve"/>
+			<point x="156" y="56"/>
+			<point x="106" y="92"/>
+			<point x="68" y="132" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 300 63</string>
+							<string>hstem 583 67</string>
+							<string>vstem 159 149</string>
+							<string>vstem 363 83</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 300 63</string>
+							<string>hstem 583 67</string>
+							<string>vstem 159 149</string>
+							<string>vstem 340 84</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0013</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 68</string>
+							<string>hstem 300 63</string>
+							<string>hstem 583 67</string>
+							<string>vstem 159 149</string>
+							<string>vstem 363 83</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>4886be41730003bb47d4f647a8518b764191efa3aa83d8c1e446747e7555c20855396dcf9fd2f40b71f7306c69dffbe346cc524384e6cad216cb5566ce2a1df3</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/two.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/two.glif
new file mode 100644
index 000000000..f0f250d21
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/two.glif
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="two" format="2">
+	<unicode hex="0032"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="40" y="0" type="line"/>
+			<point x="452" y="0" type="line"/>
+			<point x="452" y="71" type="line"/>
+			<point x="267" y="71" type="line"/>
+			<point x="234" y="71"/>
+			<point x="195" y="68"/>
+			<point x="160" y="65" type="curve"/>
+			<point x="311" y="223"/>
+			<point x="420" y="342"/>
+			<point x="420" y="462" type="curve"/>
+			<point x="420" y="575"/>
+			<point x="347" y="650"/>
+			<point x="229" y="650" type="curve"/>
+			<point x="146" y="650"/>
+			<point x="89" y="611"/>
+			<point x="36" y="553" type="curve"/>
+			<point x="83" y="506" type="line"/>
+			<point x="120" y="549"/>
+			<point x="166" y="583"/>
+			<point x="219" y="583" type="curve"/>
+			<point x="300" y="583"/>
+			<point x="340" y="531"/>
+			<point x="340" y="458" type="curve"/>
+			<point x="340" y="355"/>
+			<point x="232" y="240"/>
+			<point x="40" y="49" type="curve"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 71</string>
+							<string>hstem 583 67</string>
+							<string>vstem 340 80</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>24d026b252c7d6d2a030d2eaa6c19ad8a506205e6c16e8ec89a9967bd35b58d9f8c2be1b78051ab418a93e3ec97b389eb9d038fd723d1e0c983c58d6fd0ca939</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/u.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/u.glif
new file mode 100644
index 000000000..9331e38e6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/u.glif
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="u" format="2">
+	<unicode hex="0075"/>
+	<advance width="544"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="75" y="178" type="line"/>
+			<point x="75" y="54"/>
+			<point x="121" y="-12"/>
+			<point x="224" y="-12" type="curve"/>
+			<point name="hintSet0002" x="291" y="-12"/>
+			<point x="339" y="23"/>
+			<point x="384" y="76" type="curve"/>
+			<point x="387" y="76" type="line"/>
+			<point name="hintSet0004" x="394" y="0" type="line"/>
+			<point name="hintSet0005" x="462" y="0" type="line"/>
+			<point x="462" y="486" type="line"/>
+			<point x="380" y="486" type="line"/>
+			<point name="hintSet0008" x="380" y="141" type="line"/>
+			<point x="334" y="84"/>
+			<point x="299" y="59"/>
+			<point x="249" y="59" type="curve"/>
+			<point x="185" y="59"/>
+			<point x="158" y="98"/>
+			<point x="158" y="189" type="curve"/>
+			<point x="158" y="486" type="line"/>
+			<point x="75" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 71</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 75 83</string>
+							<string>vstem 380 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0002</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 71</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 75 83</string>
+							<string>vstem 390.5 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0004</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 75 83</string>
+							<string>vstem 390.5 71.5</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0005</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 75 83</string>
+							<string>vstem 380 82</string>
+						</array>
+					</dict>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0008</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 71</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 75 83</string>
+							<string>vstem 380 82</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w544l751787554121-12c224-12291-1233923c38476l38776l3940l4620l462486l380486l3801413348429959c249591855915898c158189l158486l75486</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/v.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/v.glif
new file mode 100644
index 000000000..2e290ca60
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/v.glif
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="v" format="2">
+	<unicode hex="0076"/>
+	<advance width="467"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="187" y="0" type="line"/>
+			<point x="283" y="0" type="line"/>
+			<point x="455" y="486" type="line"/>
+			<point x="374" y="486" type="line"/>
+			<point x="282" y="210" type="line"/>
+			<point x="268" y="162"/>
+			<point x="252" y="113"/>
+			<point x="238" y="67" type="curve"/>
+			<point x="234" y="67" type="line"/>
+			<point x="219" y="113"/>
+			<point x="203" y="162"/>
+			<point x="189" y="210" type="curve"/>
+			<point x="97" y="486" type="line"/>
+			<point x="12" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 67</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 12 443</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w467l1870l2830l455486l374486l282210268162252113c23867l23467219113203162c189210l97486l12486</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/w.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/w.glif
new file mode 100644
index 000000000..0a2099d33
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/w.glif
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="w" format="2">
+	<unicode hex="0077"/>
+	<advance width="718"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="159" y="0" type="line"/>
+			<point x="255" y="0" type="line"/>
+			<point x="323" y="260" type="line"/>
+			<point x="336" y="306"/>
+			<point x="346" y="352"/>
+			<point x="357" y="401" type="curve"/>
+			<point x="361" y="401" type="line"/>
+			<point x="373" y="352"/>
+			<point x="382" y="307"/>
+			<point x="394" y="261" type="curve"/>
+			<point x="464" y="0" type="line"/>
+			<point x="564" y="0" type="line"/>
+			<point x="694" y="486" type="line"/>
+			<point x="616" y="486" type="line"/>
+			<point x="545" y="205" type="line"/>
+			<point x="535" y="159"/>
+			<point x="526" y="115"/>
+			<point x="515" y="70" type="curve"/>
+			<point x="511" y="70" type="line"/>
+			<point x="500" y="115"/>
+			<point x="489" y="159"/>
+			<point x="477" y="205" type="curve"/>
+			<point x="401" y="486" type="line"/>
+			<point x="321" y="486" type="line"/>
+			<point x="246" y="205" type="line"/>
+			<point x="234" y="160"/>
+			<point x="224" y="115"/>
+			<point x="213" y="70" type="curve"/>
+			<point x="209" y="70" type="line"/>
+			<point x="200" y="115"/>
+			<point x="191" y="159"/>
+			<point x="180" y="205" type="curve"/>
+			<point x="108" y="486" type="line"/>
+			<point x="24" y="486" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 70</string>
+							<string>hstem 401 85</string>
+							<string>vstem 24 670</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>2ea4b8a7d7ff3087d4b143fb61ccd52c7bbefea83f2621ea83acd290d608f5420f5901acf12c09a90c698706b59069e9a9cd491b25e1bb843870e856b5f96517</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/x.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/x.glif
new file mode 100644
index 000000000..7360aaad0
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/x.glif
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="x" format="2">
+	<unicode hex="0078"/>
+	<advance width="446"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="14" y="0" type="line"/>
+			<point x="100" y="0" type="line"/>
+			<point x="166" y="113" type="line"/>
+			<point x="182" y="143"/>
+			<point x="198" y="172"/>
+			<point x="215" y="200" type="curve"/>
+			<point x="219" y="200" type="line"/>
+			<point x="237" y="172"/>
+			<point x="255" y="142"/>
+			<point x="272" y="113" type="curve"/>
+			<point x="343" y="0" type="line"/>
+			<point x="432" y="0" type="line"/>
+			<point x="274" y="245" type="line"/>
+			<point x="421" y="486" type="line"/>
+			<point x="335" y="486" type="line"/>
+			<point x="276" y="379" type="line"/>
+			<point x="261" y="353"/>
+			<point x="246" y="325"/>
+			<point x="232" y="298" type="curve"/>
+			<point x="228" y="298" type="line"/>
+			<point x="211" y="325"/>
+			<point x="195" y="353"/>
+			<point x="180" y="379" type="curve"/>
+			<point x="115" y="486" type="line"/>
+			<point x="26" y="486" type="line"/>
+			<point x="173" y="254" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 21 -21</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 14 418</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>c60e1f49a95ba6875b061ad4c854be857877f9b16c1d60ca4ac6242f348cf7f442c9d38142b5acffaf12f7bdce56e5683edf22841a773b2d1e380160313d2687</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/y.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/y.glif
new file mode 100644
index 000000000..f790db553
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/y.glif
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="y" format="2">
+	<unicode hex="0079"/>
+	<advance width="467"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="49" y="-134" type="curve"/>
+			<point x="33" y="-199" type="line"/>
+			<point x="49" y="-205"/>
+			<point x="68" y="-209"/>
+			<point x="90" y="-209" type="curve"/>
+			<point x="188" y="-209"/>
+			<point x="238" y="-136"/>
+			<point x="272" y="-40" type="curve"/>
+			<point x="455" y="486" type="line"/>
+			<point x="375" y="486" type="line"/>
+			<point x="288" y="217" type="line"/>
+			<point x="275" y="174"/>
+			<point x="261" y="124"/>
+			<point x="247" y="80" type="curve"/>
+			<point x="243" y="80" type="line"/>
+			<point x="228" y="125"/>
+			<point x="211" y="175"/>
+			<point x="196" y="217" type="curve"/>
+			<point x="97" y="486" type="line"/>
+			<point x="12" y="486" type="line"/>
+			<point x="207" y="-1" type="line"/>
+			<point x="196" y="-37" type="line"/>
+			<point x="176" y="-97"/>
+			<point x="141" y="-141"/>
+			<point x="86" y="-141" type="curve"/>
+			<point x="74" y="-141"/>
+			<point x="59" y="-137"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -209 68</string>
+							<string>hstem 486 -20</string>
+							<string>vstem 12 443</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>d14e2d31ca4e240c0b5c0130ab5367c49328b53fbb3dbe6843e4850856ec272cba1630455ed6acfb3f4185d8e3b4707964fae99e2d3bf183f41c17ea7db51987</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/z.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/z.glif
new file mode 100644
index 000000000..190d76642
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/z.glif
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="z" format="2">
+	<unicode hex="007A"/>
+	<advance width="425"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="31" y="0" type="line"/>
+			<point x="399" y="0" type="line"/>
+			<point x="399" y="67" type="line"/>
+			<point x="135" y="67" type="line"/>
+			<point x="391" y="442" type="line"/>
+			<point x="391" y="486" type="line"/>
+			<point x="59" y="486" type="line"/>
+			<point x="59" y="419" type="line"/>
+			<point x="287" y="419" type="line"/>
+			<point x="31" y="44" type="line"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem 0 67</string>
+							<string>hstem 419 67</string>
+							<string>vstem 31 368</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>w425l310l3990l39967l13567l391442l391486l59486l59419l287419l3144</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/zero.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/zero.glif
new file mode 100644
index 000000000..f56a61bf6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs.com.adobe.type.processedglyphs/zero.glif
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="zero" format="2">
+	<unicode hex="0030"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point name="hintSet0000" x="249" y="-12" type="curve"/>
+			<point x="376" y="-12"/>
+			<point x="453" y="107"/>
+			<point x="453" y="321" type="curve"/>
+			<point x="453" y="535"/>
+			<point x="376" y="650"/>
+			<point x="249" y="650" type="curve"/>
+			<point x="121" y="650"/>
+			<point x="44" y="535"/>
+			<point x="44" y="321" type="curve"/>
+			<point x="44" y="107"/>
+			<point x="121" y="-12"/>
+		</contour>
+		<contour>
+			<point x="249" y="54" type="curve"/>
+			<point x="174" y="54"/>
+			<point x="124" y="134"/>
+			<point x="124" y="321" type="curve"/>
+			<point x="124" y="508"/>
+			<point x="174" y="584"/>
+			<point x="249" y="584" type="curve"/>
+			<point x="323" y="584"/>
+			<point x="373" y="508"/>
+			<point x="373" y="321" type="curve"/>
+			<point x="373" y="134"/>
+			<point x="323" y="54"/>
+		</contour>
+	</outline>
+	<lib>
+		<dict>
+			<key>com.adobe.type.autohint.v2</key>
+			<dict>
+				<key>hintSetList</key>
+				<array>
+					<dict>
+						<key>pointTag</key>
+						<string>hintSet0000</string>
+						<key>stems</key>
+						<array>
+							<string>hstem -12 66</string>
+							<string>hstem 584 66</string>
+							<string>vstem 44 80</string>
+							<string>vstem 373 80</string>
+						</array>
+					</dict>
+				</array>
+				<key>id</key>
+				<string>d8c77fb9b3c0f9a266a500cc9a55d0b870a270cc6affab1f87696fc531c727c150c60060200509eb3bb0279a21a90b4245e39bb9992f482674cec535549888b2</string>
+			</dict>
+		</dict>
+	</lib>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/A_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/A_.glif
new file mode 100644
index 000000000..56dbc8216
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/A_.glif
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="A" format="2">
+	<unicode hex="0041"/>
+	<advance width="544"/>
+	<outline>
+		<contour>
+			<point x="452" y="0" type="line"/>
+			<point x="541" y="0" type="line"/>
+			<point x="319" y="656" type="line"/>
+			<point x="225" y="656" type="line"/>
+			<point x="3" y="0" type="line"/>
+			<point x="88" y="0" type="line"/>
+			<point x="151" y="200" type="line"/>
+			<point x="390" y="200" type="line"/>
+		</contour>
+		<contour>
+			<point x="203" y="367" type="line"/>
+			<point x="227" y="440"/>
+			<point x="248" y="512"/>
+			<point x="268" y="588" type="curve"/>
+			<point x="272" y="588" type="line"/>
+			<point x="293" y="512"/>
+			<point x="314" y="440"/>
+			<point x="338" y="367" type="curve"/>
+			<point x="369" y="267" type="line"/>
+			<point x="172" y="267" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/C_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/C_.glif
new file mode 100644
index 000000000..a051143e7
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/C_.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="C" format="2">
+	<unicode hex="0043"/>
+	<advance width="571"/>
+	<outline>
+		<contour>
+			<point x="52" y="328" type="curve"/>
+			<point x="52" y="114"/>
+			<point x="174" y="-12"/>
+			<point x="339" y="-12" type="curve"/>
+			<point x="423" y="-12"/>
+			<point x="487" y="23"/>
+			<point x="539" y="83" type="curve"/>
+			<point x="492" y="134" type="line"/>
+			<point x="450" y="87"/>
+			<point x="404" y="61"/>
+			<point x="341" y="61" type="curve"/>
+			<point x="217" y="61"/>
+			<point x="138" y="165"/>
+			<point x="138" y="330" type="curve"/>
+			<point x="138" y="493"/>
+			<point x="220" y="595"/>
+			<point x="345" y="595" type="curve"/>
+			<point x="400" y="595"/>
+			<point x="442" y="571"/>
+			<point x="476" y="534" type="curve"/>
+			<point x="523" y="587" type="line"/>
+			<point x="485" y="630"/>
+			<point x="423" y="668"/>
+			<point x="344" y="668" type="curve"/>
+			<point x="176" y="668"/>
+			<point x="52" y="539"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/D_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/D_.glif
new file mode 100644
index 000000000..764059851
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/D_.glif
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="D" format="2">
+	<unicode hex="0044"/>
+	<advance width="615"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="258" y="0" type="line"/>
+			<point x="456" y="0"/>
+			<point x="564" y="122"/>
+			<point x="564" y="331" type="curve"/>
+			<point x="564" y="539"/>
+			<point x="456" y="656"/>
+			<point x="254" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+		<contour>
+			<point x="173" y="68" type="line"/>
+			<point x="173" y="588" type="line"/>
+			<point x="248" y="588" type="line"/>
+			<point x="401" y="588"/>
+			<point x="478" y="496"/>
+			<point x="478" y="331" type="curve"/>
+			<point x="478" y="165"/>
+			<point x="401" y="68"/>
+			<point x="248" y="68" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/E_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/E_.glif
new file mode 100644
index 000000000..b06bd2f68
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/E_.glif
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="E" format="2">
+	<unicode hex="0045"/>
+	<advance width="527"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="478" y="0" type="line"/>
+			<point x="478" y="71" type="line"/>
+			<point x="173" y="71" type="line"/>
+			<point x="173" y="309" type="line"/>
+			<point x="422" y="309" type="line"/>
+			<point x="422" y="380" type="line"/>
+			<point x="173" y="380" type="line"/>
+			<point x="173" y="586" type="line"/>
+			<point x="468" y="586" type="line"/>
+			<point x="468" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/F_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/F_.glif
new file mode 100644
index 000000000..8e0247813
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/F_.glif
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="F" format="2">
+	<unicode hex="0046"/>
+	<advance width="494"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="294" type="line"/>
+			<point x="423" y="294" type="line"/>
+			<point x="423" y="364" type="line"/>
+			<point x="173" y="364" type="line"/>
+			<point x="173" y="586" type="line"/>
+			<point x="468" y="586" type="line"/>
+			<point x="468" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/G_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/G_.glif
new file mode 100644
index 000000000..157853617
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/G_.glif
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="G" format="2">
+	<unicode hex="0047"/>
+	<advance width="617"/>
+	<outline>
+		<contour>
+			<point x="52" y="328" type="curve"/>
+			<point x="52" y="114"/>
+			<point x="175" y="-12"/>
+			<point x="347" y="-12" type="curve"/>
+			<point x="435" y="-12"/>
+			<point x="507" y="20"/>
+			<point x="550" y="64" type="curve"/>
+			<point x="550" y="340" type="line"/>
+			<point x="335" y="340" type="line"/>
+			<point x="335" y="271" type="line"/>
+			<point x="474" y="271" type="line"/>
+			<point x="474" y="100" type="line"/>
+			<point x="448" y="76"/>
+			<point x="403" y="61"/>
+			<point x="356" y="61" type="curve"/>
+			<point x="216" y="61"/>
+			<point x="138" y="165"/>
+			<point x="138" y="330" type="curve"/>
+			<point x="138" y="493"/>
+			<point x="223" y="595"/>
+			<point x="355" y="595" type="curve"/>
+			<point x="421" y="595"/>
+			<point x="462" y="569"/>
+			<point x="495" y="534" type="curve"/>
+			<point x="542" y="587" type="line"/>
+			<point x="504" y="627"/>
+			<point x="444" y="668"/>
+			<point x="354" y="668" type="curve"/>
+			<point x="179" y="668"/>
+			<point x="52" y="539"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/H_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/H_.glif
new file mode 100644
index 000000000..c045fdd5a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/H_.glif
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="H" format="2">
+	<unicode hex="0048"/>
+	<advance width="652"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="309" type="line"/>
+			<point x="478" y="309" type="line"/>
+			<point x="478" y="0" type="line"/>
+			<point x="562" y="0" type="line"/>
+			<point x="562" y="656" type="line"/>
+			<point x="478" y="656" type="line"/>
+			<point x="478" y="381" type="line"/>
+			<point x="173" y="381" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/I_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/I_.glif
new file mode 100644
index 000000000..6c293ec1f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/I_.glif
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="I" format="2">
+	<unicode hex="0049"/>
+	<advance width="263"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/J_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/J_.glif
new file mode 100644
index 000000000..c3efea7a6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/J_.glif
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="J" format="2">
+	<unicode hex="004A"/>
+	<advance width="480"/>
+	<outline>
+		<contour>
+			<point x="31" y="93" type="line"/>
+			<point x="69" y="24"/>
+			<point x="129" y="-12"/>
+			<point x="212" y="-12" type="curve"/>
+			<point x="340" y="-12"/>
+			<point x="393" y="80"/>
+			<point x="393" y="193" type="curve"/>
+			<point x="393" y="656" type="line"/>
+			<point x="309" y="656" type="line"/>
+			<point x="309" y="201" type="line"/>
+			<point x="309" y="101"/>
+			<point x="274" y="61"/>
+			<point x="204" y="61" type="curve"/>
+			<point x="157" y="61"/>
+			<point x="120" y="83"/>
+			<point x="91" y="135" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/K_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/K_.glif
new file mode 100644
index 000000000..b94b0c205
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/K_.glif
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="K" format="2">
+	<unicode hex="004B"/>
+	<advance width="579"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="208" type="line"/>
+			<point x="286" y="341" type="line"/>
+			<point x="482" y="0" type="line"/>
+			<point x="575" y="0" type="line"/>
+			<point x="338" y="406" type="line"/>
+			<point x="543" y="656" type="line"/>
+			<point x="449" y="656" type="line"/>
+			<point x="176" y="327" type="line"/>
+			<point x="173" y="327" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/L_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/L_.glif
new file mode 100644
index 000000000..246aec150
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/L_.glif
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="L" format="2">
+	<unicode hex="004C"/>
+	<advance width="486"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="460" y="0" type="line"/>
+			<point x="460" y="71" type="line"/>
+			<point x="173" y="71" type="line"/>
+			<point x="173" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/M_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/M_.glif
new file mode 100644
index 000000000..202af9514
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/M_.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="M" format="2">
+	<unicode hex="004D"/>
+	<advance width="727"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="167" y="0" type="line"/>
+			<point x="167" y="361" type="line"/>
+			<point x="167" y="419"/>
+			<point x="160" y="497"/>
+			<point x="156" y="555" type="curve"/>
+			<point x="160" y="555" type="line"/>
+			<point x="212" y="409" type="line"/>
+			<point x="339" y="66" type="line"/>
+			<point x="386" y="66" type="line"/>
+			<point x="512" y="409" type="line"/>
+			<point x="565" y="555" type="line"/>
+			<point x="569" y="555" type="line"/>
+			<point x="564" y="497"/>
+			<point x="558" y="419"/>
+			<point x="558" y="361" type="curve"/>
+			<point x="558" y="0" type="line"/>
+			<point x="637" y="0" type="line"/>
+			<point x="637" y="656" type="line"/>
+			<point x="539" y="656" type="line"/>
+			<point x="413" y="304" type="line"/>
+			<point x="367" y="170" type="line"/>
+			<point x="363" y="170" type="line"/>
+			<point x="315" y="304" type="line"/>
+			<point x="188" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/N_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/N_.glif
new file mode 100644
index 000000000..48c6f6298
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/N_.glif
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="N" format="2">
+	<unicode hex="004E"/>
+	<advance width="647"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="169" y="0" type="line"/>
+			<point x="169" y="343" type="line"/>
+			<point x="169" y="412"/>
+			<point x="163" y="482"/>
+			<point x="158" y="548" type="curve"/>
+			<point x="162" y="548" type="line"/>
+			<point x="233" y="413" type="line"/>
+			<point x="471" y="0" type="line"/>
+			<point x="557" y="0" type="line"/>
+			<point x="557" y="656" type="line"/>
+			<point x="478" y="656" type="line"/>
+			<point x="478" y="317" type="line"/>
+			<point x="478" y="248"/>
+			<point x="484" y="174"/>
+			<point x="488" y="108" type="curve"/>
+			<point x="484" y="108" type="line"/>
+			<point x="413" y="244" type="line"/>
+			<point x="176" y="656" type="line"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/O_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/O_.glif
new file mode 100644
index 000000000..f66477568
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/O_.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="O" format="2">
+	<unicode hex="004F"/>
+	<advance width="664"/>
+	<outline>
+		<contour>
+			<point x="332" y="-12" type="curve"/>
+			<point x="497" y="-12"/>
+			<point x="613" y="120"/>
+			<point x="613" y="331" type="curve"/>
+			<point x="613" y="540"/>
+			<point x="497" y="668"/>
+			<point x="332" y="668" type="curve"/>
+			<point x="167" y="668"/>
+			<point x="52" y="541"/>
+			<point x="52" y="331" type="curve"/>
+			<point x="52" y="120"/>
+			<point x="167" y="-12"/>
+		</contour>
+		<contour>
+			<point x="332" y="61" type="curve"/>
+			<point x="215" y="61"/>
+			<point x="138" y="167"/>
+			<point x="138" y="331" type="curve"/>
+			<point x="138" y="494"/>
+			<point x="215" y="595"/>
+			<point x="332" y="595" type="curve"/>
+			<point x="449" y="595"/>
+			<point x="526" y="494"/>
+			<point x="526" y="331" type="curve"/>
+			<point x="526" y="167"/>
+			<point x="449" y="61"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/P_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/P_.glif
new file mode 100644
index 000000000..c6dce3416
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/P_.glif
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="P" format="2">
+	<unicode hex="0050"/>
+	<advance width="576"/>
+	<outline>
+		<contour>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="260" type="line"/>
+			<point x="291" y="260" type="line"/>
+			<point x="435" y="260"/>
+			<point x="533" y="325"/>
+			<point x="533" y="463" type="curve"/>
+			<point x="533" y="607"/>
+			<point x="436" y="656"/>
+			<point x="291" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+		</contour>
+		<contour>
+			<point x="173" y="328" type="line"/>
+			<point x="173" y="589" type="line"/>
+			<point x="281" y="589" type="line"/>
+			<point x="394" y="589"/>
+			<point x="450" y="558"/>
+			<point x="450" y="463" type="curve"/>
+			<point x="450" y="370"/>
+			<point x="395" y="328"/>
+			<point x="281" y="328" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Q_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Q_.glif
new file mode 100644
index 000000000..90c1d4438
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Q_.glif
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="Q" format="2">
+	<unicode hex="0051"/>
+	<advance width="664"/>
+	<outline>
+		<contour>
+			<point x="138" y="331" type="curve"/>
+			<point x="138" y="494"/>
+			<point x="215" y="595"/>
+			<point x="332" y="595" type="curve"/>
+			<point x="449" y="595"/>
+			<point x="526" y="494"/>
+			<point x="526" y="331" type="curve"/>
+			<point x="526" y="163"/>
+			<point x="449" y="57"/>
+			<point x="332" y="57" type="curve"/>
+			<point x="215" y="57"/>
+			<point x="138" y="163"/>
+		</contour>
+		<contour>
+			<point x="611" y="-84" type="line"/>
+			<point x="593" y="-89"/>
+			<point x="571" y="-94"/>
+			<point x="542" y="-94" type="curve"/>
+			<point x="471" y="-94"/>
+			<point x="411" y="-66"/>
+			<point x="381" y="-8" type="curve"/>
+			<point x="520" y="16"/>
+			<point x="613" y="142"/>
+			<point x="613" y="331" type="curve"/>
+			<point x="613" y="540"/>
+			<point x="497" y="668"/>
+			<point x="332" y="668" type="curve"/>
+			<point x="167" y="668"/>
+			<point x="52" y="541"/>
+			<point x="52" y="331" type="curve"/>
+			<point x="52" y="138"/>
+			<point x="148" y="11"/>
+			<point x="291" y="-9" type="curve"/>
+			<point x="329" y="-99"/>
+			<point x="412" y="-164"/>
+			<point x="533" y="-164" type="curve"/>
+			<point x="572" y="-164"/>
+			<point x="607" y="-156"/>
+			<point x="627" y="-149" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/R_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/R_.glif
new file mode 100644
index 000000000..3b0d12ba7
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/R_.glif
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="R" format="2">
+	<unicode hex="0052"/>
+	<advance width="581"/>
+	<outline>
+		<contour>
+			<point x="173" y="589" type="line"/>
+			<point x="283" y="589" type="line"/>
+			<point x="385" y="589"/>
+			<point x="442" y="558"/>
+			<point x="442" y="472" type="curve"/>
+			<point x="442" y="387"/>
+			<point x="385" y="345"/>
+			<point x="283" y="345" type="curve"/>
+			<point x="173" y="345" type="line"/>
+		</contour>
+		<contour>
+			<point x="544" y="0" type="line"/>
+			<point x="378" y="286" type="line"/>
+			<point x="467" y="308"/>
+			<point x="525" y="370"/>
+			<point x="525" y="472" type="curve"/>
+			<point x="525" y="608"/>
+			<point x="429" y="656"/>
+			<point x="295" y="656" type="curve"/>
+			<point x="90" y="656" type="line"/>
+			<point x="90" y="0" type="line"/>
+			<point x="173" y="0" type="line"/>
+			<point x="173" y="277" type="line"/>
+			<point x="292" y="277" type="line"/>
+			<point x="450" y="0" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/S_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/S_.glif
new file mode 100644
index 000000000..aba82a3d8
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/S_.glif
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="S" format="2">
+	<unicode hex="0053"/>
+	<advance width="534"/>
+	<outline>
+		<contour>
+			<point x="42" y="85" type="line"/>
+			<point x="99" y="26"/>
+			<point x="180" y="-12"/>
+			<point x="272" y="-12" type="curve"/>
+			<point x="410" y="-12"/>
+			<point x="495" y="71"/>
+			<point x="495" y="175" type="curve"/>
+			<point x="495" y="272"/>
+			<point x="436" y="317"/>
+			<point x="360" y="350" type="curve"/>
+			<point x="267" y="390" type="line"/>
+			<point x="215" y="412"/>
+			<point x="158" y="436"/>
+			<point x="158" y="499" type="curve"/>
+			<point x="158" y="558"/>
+			<point x="207" y="595"/>
+			<point x="280" y="595" type="curve"/>
+			<point x="341" y="595"/>
+			<point x="389" y="571"/>
+			<point x="429" y="533" type="curve"/>
+			<point x="474" y="587" type="line"/>
+			<point x="427" y="635"/>
+			<point x="358" y="668"/>
+			<point x="280" y="668" type="curve"/>
+			<point x="161" y="668"/>
+			<point x="74" y="594"/>
+			<point x="74" y="494" type="curve"/>
+			<point x="74" y="398"/>
+			<point x="145" y="351"/>
+			<point x="207" y="325" type="curve"/>
+			<point x="301" y="284" type="line"/>
+			<point x="363" y="256"/>
+			<point x="410" y="235"/>
+			<point x="410" y="168" type="curve"/>
+			<point x="410" y="104"/>
+			<point x="359" y="61"/>
+			<point x="273" y="61" type="curve"/>
+			<point x="205" y="61"/>
+			<point x="139" y="94"/>
+			<point x="92" y="143" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/T_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/T_.glif
new file mode 100644
index 000000000..6dc3a6efa
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/T_.glif
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="T" format="2">
+	<unicode hex="0054"/>
+	<advance width="536"/>
+	<outline>
+		<contour>
+			<point x="226" y="0" type="line"/>
+			<point x="310" y="0" type="line"/>
+			<point x="310" y="586" type="line"/>
+			<point x="508" y="586" type="line"/>
+			<point x="508" y="656" type="line"/>
+			<point x="28" y="656" type="line"/>
+			<point x="28" y="586" type="line"/>
+			<point x="226" y="586" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/U_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/U_.glif
new file mode 100644
index 000000000..4fc9735ee
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/U_.glif
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="U" format="2">
+	<unicode hex="0055"/>
+	<advance width="645"/>
+	<outline>
+		<contour>
+			<point x="87" y="271" type="line"/>
+			<point x="87" y="60"/>
+			<point x="189" y="-12"/>
+			<point x="323" y="-12" type="curve"/>
+			<point x="457" y="-12"/>
+			<point x="558" y="60"/>
+			<point x="558" y="271" type="curve"/>
+			<point x="558" y="656" type="line"/>
+			<point x="478" y="656" type="line"/>
+			<point x="478" y="269" type="line"/>
+			<point x="478" y="111"/>
+			<point x="410" y="61"/>
+			<point x="323" y="61" type="curve"/>
+			<point x="237" y="61"/>
+			<point x="170" y="111"/>
+			<point x="170" y="269" type="curve"/>
+			<point x="170" y="656" type="line"/>
+			<point x="87" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/V_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/V_.glif
new file mode 100644
index 000000000..ae86fdba6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/V_.glif
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="V" format="2">
+	<unicode hex="0056"/>
+	<advance width="515"/>
+	<outline>
+		<contour>
+			<point x="210" y="0" type="line"/>
+			<point x="307" y="0" type="line"/>
+			<point x="515" y="656" type="line"/>
+			<point x="430" y="656" type="line"/>
+			<point x="325" y="302" type="line"/>
+			<point x="302" y="224"/>
+			<point x="286" y="162"/>
+			<point x="262" y="85" type="curve"/>
+			<point x="258" y="85" type="line"/>
+			<point x="233" y="162"/>
+			<point x="218" y="224"/>
+			<point x="194" y="302" type="curve"/>
+			<point x="89" y="656" type="line"/>
+			<point x="0" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/W_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/W_.glif
new file mode 100644
index 000000000..7f5d981f8
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/W_.glif
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="W" format="2">
+	<unicode hex="0057"/>
+	<advance width="786"/>
+	<outline>
+		<contour>
+			<point x="162" y="0" type="line"/>
+			<point x="261" y="0" type="line"/>
+			<point x="358" y="395" type="line"/>
+			<point x="369" y="446"/>
+			<point x="381" y="493"/>
+			<point x="391" y="544" type="curve"/>
+			<point x="395" y="544" type="line"/>
+			<point x="405" y="493"/>
+			<point x="415" y="446"/>
+			<point x="427" y="395" type="curve"/>
+			<point x="526" y="0" type="line"/>
+			<point x="626" y="0" type="line"/>
+			<point x="762" y="656" type="line"/>
+			<point x="682" y="656" type="line"/>
+			<point x="613" y="299" type="line"/>
+			<point x="600" y="229"/>
+			<point x="588" y="158"/>
+			<point x="576" y="87" type="curve"/>
+			<point x="572" y="87" type="line"/>
+			<point x="556" y="158"/>
+			<point x="540" y="230"/>
+			<point x="524" y="299" type="curve"/>
+			<point x="433" y="656" type="line"/>
+			<point x="357" y="656" type="line"/>
+			<point x="266" y="299" type="line"/>
+			<point x="251" y="229"/>
+			<point x="235" y="158"/>
+			<point x="220" y="87" type="curve"/>
+			<point x="216" y="87" type="line"/>
+			<point x="204" y="158"/>
+			<point x="190" y="228"/>
+			<point x="178" y="299" type="curve"/>
+			<point x="109" y="656" type="line"/>
+			<point x="23" y="656" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/X_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/X_.glif
new file mode 100644
index 000000000..73572813e
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/X_.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="X" format="2">
+	<unicode hex="0058"/>
+	<advance width="513"/>
+	<outline>
+		<contour>
+			<point x="15" y="0" type="line"/>
+			<point x="103" y="0" type="line"/>
+			<point x="198" y="177" type="line"/>
+			<point x="214" y="209"/>
+			<point x="231" y="242"/>
+			<point x="250" y="282" type="curve"/>
+			<point x="254" y="282" type="line"/>
+			<point x="275" y="242"/>
+			<point x="293" y="209"/>
+			<point x="310" y="177" type="curve"/>
+			<point x="406" y="0" type="line"/>
+			<point x="498" y="0" type="line"/>
+			<point x="307" y="335" type="line"/>
+			<point x="486" y="656" type="line"/>
+			<point x="398" y="656" type="line"/>
+			<point x="311" y="488" type="line"/>
+			<point x="295" y="458"/>
+			<point x="282" y="431"/>
+			<point x="264" y="393" type="curve"/>
+			<point x="260" y="393" type="line"/>
+			<point x="240" y="431"/>
+			<point x="226" y="458"/>
+			<point x="209" y="488" type="curve"/>
+			<point x="120" y="656" type="line"/>
+			<point x="28" y="656" type="line"/>
+			<point x="206" y="339" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Y_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Y_.glif
new file mode 100644
index 000000000..d38492faa
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Y_.glif
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="Y" format="2">
+	<unicode hex="0059"/>
+	<advance width="476"/>
+	<outline>
+		<contour>
+			<point x="196" y="0" type="line"/>
+			<point x="280" y="0" type="line"/>
+			<point x="280" y="254" type="line"/>
+			<point x="477" y="656" type="line"/>
+			<point x="390" y="656" type="line"/>
+			<point x="306" y="471" type="line"/>
+			<point x="286" y="423"/>
+			<point x="263" y="377"/>
+			<point x="240" y="328" type="curve"/>
+			<point x="236" y="328" type="line"/>
+			<point x="214" y="377"/>
+			<point x="194" y="423"/>
+			<point x="173" y="471" type="curve"/>
+			<point x="88" y="656" type="line"/>
+			<point x="-1" y="656" type="line"/>
+			<point x="196" y="254" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Z_.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Z_.glif
new file mode 100644
index 000000000..6163ef88e
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/Z_.glif
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="Z" format="2">
+	<unicode hex="005A"/>
+	<advance width="539"/>
+	<outline>
+		<contour>
+			<point x="45" y="0" type="line"/>
+			<point x="497" y="0" type="line"/>
+			<point x="497" y="71" type="line"/>
+			<point x="148" y="71" type="line"/>
+			<point x="494" y="607" type="line"/>
+			<point x="494" y="656" type="line"/>
+			<point x="76" y="656" type="line"/>
+			<point x="76" y="586" type="line"/>
+			<point x="390" y="586" type="line"/>
+			<point x="45" y="50" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/_notdef.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/_notdef.glif
new file mode 100644
index 000000000..0732d24b2
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/_notdef.glif
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name=".notdef" format="2">
+	<advance width="653"/>
+	<outline>
+		<contour>
+			<point x="89" y="0" type="line"/>
+			<point x="565" y="0" type="line"/>
+			<point x="565" y="660" type="line"/>
+			<point x="89" y="660" type="line"/>
+		</contour>
+		<contour>
+			<point x="154" y="110" type="line"/>
+			<point x="154" y="572" type="line"/>
+			<point x="281" y="340" type="line"/>
+		</contour>
+		<contour>
+			<point x="372" y="340" type="line"/>
+			<point x="498" y="572" type="line"/>
+			<point x="498" y="110" type="line"/>
+		</contour>
+		<contour>
+			<point x="197" y="58" type="line"/>
+			<point x="271" y="190" type="line"/>
+			<point x="325" y="293" type="line"/>
+			<point x="329" y="293" type="line"/>
+			<point x="381" y="190" type="line"/>
+			<point x="454" y="58" type="line"/>
+		</contour>
+		<contour>
+			<point x="325" y="387" type="line"/>
+			<point x="275" y="481" type="line"/>
+			<point x="209" y="600" type="line"/>
+			<point x="444" y="600" type="line"/>
+			<point x="378" y="481" type="line"/>
+			<point x="329" y="387" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/a.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/a.glif
new file mode 100644
index 000000000..20d872e2f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/a.glif
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="a" format="2">
+	<unicode hex="0061"/>
+	<advance width="512"/>
+	<outline>
+		<contour>
+			<point x="58" y="126" type="curve"/>
+			<point x="58" y="39"/>
+			<point x="119" y="-12"/>
+			<point x="201" y="-12" type="curve"/>
+			<point x="261" y="-12"/>
+			<point x="315" y="20"/>
+			<point x="362" y="58" type="curve"/>
+			<point x="364" y="58" type="line"/>
+			<point x="371" y="0" type="line"/>
+			<point x="439" y="0" type="line"/>
+			<point x="439" y="298" type="line"/>
+			<point x="439" y="419"/>
+			<point x="389" y="498"/>
+			<point x="270" y="498" type="curve"/>
+			<point x="192" y="498"/>
+			<point x="124" y="464"/>
+			<point x="79" y="435" type="curve"/>
+			<point x="112" y="378" type="line"/>
+			<point x="150" y="404"/>
+			<point x="200" y="430"/>
+			<point x="257" y="430" type="curve"/>
+			<point x="336" y="430"/>
+			<point x="357" y="370"/>
+			<point x="357" y="308" type="curve"/>
+			<point x="150" y="285"/>
+			<point x="58" y="232"/>
+		</contour>
+		<contour>
+			<point x="139" y="132" type="curve"/>
+			<point x="139" y="194"/>
+			<point x="194" y="234"/>
+			<point x="357" y="254" type="curve"/>
+			<point x="357" y="119" type="line"/>
+			<point x="310" y="77"/>
+			<point x="271" y="54"/>
+			<point x="224" y="54" type="curve"/>
+			<point x="176" y="54"/>
+			<point x="139" y="77"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/b.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/b.glif
new file mode 100644
index 000000000..197fc0c2c
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/b.glif
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="b" format="2">
+	<unicode hex="0062"/>
+	<advance width="555"/>
+	<outline>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="148" y="0" type="line"/>
+			<point x="155" y="48" type="line"/>
+			<point x="158" y="48" type="line"/>
+			<point x="201" y="10"/>
+			<point x="252" y="-12"/>
+			<point x="297" y="-12" type="curve"/>
+			<point x="408" y="-12"/>
+			<point x="507" y="85"/>
+			<point x="507" y="251" type="curve"/>
+			<point x="507" y="401"/>
+			<point x="440" y="498"/>
+			<point x="314" y="498" type="curve"/>
+			<point x="260" y="498"/>
+			<point x="206" y="469"/>
+			<point x="162" y="430" type="curve"/>
+			<point x="164" y="518" type="line"/>
+			<point x="164" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+		<contour>
+			<point x="164" y="108" type="curve"/>
+			<point x="164" y="363" type="line"/>
+			<point x="210" y="406"/>
+			<point x="253" y="429"/>
+			<point x="294" y="429" type="curve"/>
+			<point x="386" y="429"/>
+			<point x="422" y="357"/>
+			<point x="422" y="250" type="curve"/>
+			<point x="422" y="130"/>
+			<point x="363" y="57"/>
+			<point x="283" y="57" type="curve"/>
+			<point x="251" y="57"/>
+			<point x="207" y="71"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/c.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/c.glif
new file mode 100644
index 000000000..e91743302
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/c.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="c" format="2">
+	<unicode hex="0063"/>
+	<advance width="456"/>
+	<outline>
+		<contour>
+			<point x="46" y="242" type="curve"/>
+			<point x="46" y="81"/>
+			<point x="145" y="-12"/>
+			<point x="274" y="-12" type="curve"/>
+			<point x="332" y="-12"/>
+			<point x="388" y="12"/>
+			<point x="432" y="51" type="curve"/>
+			<point x="395" y="105" type="line"/>
+			<point x="366" y="79"/>
+			<point x="327" y="56"/>
+			<point x="281" y="56" type="curve"/>
+			<point x="192" y="56"/>
+			<point x="131" y="131"/>
+			<point x="131" y="242" type="curve"/>
+			<point x="131" y="354"/>
+			<point x="195" y="430"/>
+			<point x="283" y="430" type="curve"/>
+			<point x="322" y="430"/>
+			<point x="352" y="412"/>
+			<point x="381" y="387" type="curve"/>
+			<point x="422" y="440" type="line"/>
+			<point x="389" y="471"/>
+			<point x="344" y="498"/>
+			<point x="280" y="498" type="curve"/>
+			<point x="155" y="498"/>
+			<point x="46" y="405"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/contents.plist b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/contents.plist
new file mode 100644
index 000000000..864544c60
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/contents.plist
@@ -0,0 +1,132 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>.notdef</key>
+		<string>_notdef.glif</string>
+		<key>A</key>
+		<string>A_.glif</string>
+		<key>C</key>
+		<string>C_.glif</string>
+		<key>D</key>
+		<string>D_.glif</string>
+		<key>E</key>
+		<string>E_.glif</string>
+		<key>F</key>
+		<string>F_.glif</string>
+		<key>G</key>
+		<string>G_.glif</string>
+		<key>H</key>
+		<string>H_.glif</string>
+		<key>I</key>
+		<string>I_.glif</string>
+		<key>J</key>
+		<string>J_.glif</string>
+		<key>K</key>
+		<string>K_.glif</string>
+		<key>L</key>
+		<string>L_.glif</string>
+		<key>M</key>
+		<string>M_.glif</string>
+		<key>N</key>
+		<string>N_.glif</string>
+		<key>O</key>
+		<string>O_.glif</string>
+		<key>P</key>
+		<string>P_.glif</string>
+		<key>Q</key>
+		<string>Q_.glif</string>
+		<key>R</key>
+		<string>R_.glif</string>
+		<key>S</key>
+		<string>S_.glif</string>
+		<key>T</key>
+		<string>T_.glif</string>
+		<key>U</key>
+		<string>U_.glif</string>
+		<key>V</key>
+		<string>V_.glif</string>
+		<key>W</key>
+		<string>W_.glif</string>
+		<key>X</key>
+		<string>X_.glif</string>
+		<key>Y</key>
+		<string>Y_.glif</string>
+		<key>Z</key>
+		<string>Z_.glif</string>
+		<key>a</key>
+		<string>a.glif</string>
+		<key>b</key>
+		<string>b.glif</string>
+		<key>c</key>
+		<string>c.glif</string>
+		<key>d</key>
+		<string>d.glif</string>
+		<key>e</key>
+		<string>e.glif</string>
+		<key>eight</key>
+		<string>eight.glif</string>
+		<key>f</key>
+		<string>f.glif</string>
+		<key>five</key>
+		<string>five.glif</string>
+		<key>four</key>
+		<string>four.glif</string>
+		<key>g</key>
+		<string>g.glif</string>
+		<key>h</key>
+		<string>h.glif</string>
+		<key>i</key>
+		<string>i.glif</string>
+		<key>j</key>
+		<string>j.glif</string>
+		<key>k</key>
+		<string>k.glif</string>
+		<key>l</key>
+		<string>l.glif</string>
+		<key>m</key>
+		<string>m.glif</string>
+		<key>n</key>
+		<string>n.glif</string>
+		<key>nine</key>
+		<string>nine.glif</string>
+		<key>o</key>
+		<string>o.glif</string>
+		<key>one</key>
+		<string>one.glif</string>
+		<key>p</key>
+		<string>p.glif</string>
+		<key>q</key>
+		<string>q.glif</string>
+		<key>r</key>
+		<string>r.glif</string>
+		<key>s</key>
+		<string>s.glif</string>
+		<key>seven</key>
+		<string>seven.glif</string>
+		<key>six</key>
+		<string>six.glif</string>
+		<key>space</key>
+		<string>space.glif</string>
+		<key>t</key>
+		<string>t.glif</string>
+		<key>three</key>
+		<string>three.glif</string>
+		<key>two</key>
+		<string>two.glif</string>
+		<key>u</key>
+		<string>u.glif</string>
+		<key>v</key>
+		<string>v.glif</string>
+		<key>w</key>
+		<string>w.glif</string>
+		<key>x</key>
+		<string>x.glif</string>
+		<key>y</key>
+		<string>y.glif</string>
+		<key>z</key>
+		<string>z.glif</string>
+		<key>zero</key>
+		<string>zero.glif</string>
+	</dict>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/d.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/d.glif
new file mode 100644
index 000000000..94f8e71f8
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/d.glif
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="d" format="2">
+	<unicode hex="0064"/>
+	<advance width="555"/>
+	<outline>
+		<contour>
+			<point x="47" y="242" type="curve"/>
+			<point x="47" y="80"/>
+			<point x="126" y="-12"/>
+			<point x="248" y="-12" type="curve"/>
+			<point x="305" y="-12"/>
+			<point x="357" y="20"/>
+			<point x="395" y="57" type="curve"/>
+			<point x="398" y="57" type="line"/>
+			<point x="405" y="0" type="line"/>
+			<point x="473" y="0" type="line"/>
+			<point x="473" y="712" type="line"/>
+			<point x="390" y="712" type="line"/>
+			<point x="390" y="525" type="line"/>
+			<point x="394" y="442" type="line"/>
+			<point x="351" y="477"/>
+			<point x="314" y="498"/>
+			<point x="258" y="498" type="curve"/>
+			<point x="147" y="498"/>
+			<point x="47" y="400"/>
+		</contour>
+		<contour>
+			<point x="132" y="243" type="curve"/>
+			<point x="132" y="354"/>
+			<point x="194" y="429"/>
+			<point x="272" y="429" type="curve"/>
+			<point x="312" y="429"/>
+			<point x="349" y="415"/>
+			<point x="390" y="378" type="curve"/>
+			<point x="390" y="124" type="line"/>
+			<point x="350" y="79"/>
+			<point x="311" y="57"/>
+			<point x="266" y="57" type="curve"/>
+			<point x="181" y="57"/>
+			<point x="132" y="127"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/e.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/e.glif
new file mode 100644
index 000000000..db2cbf13f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/e.glif
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="e" format="2">
+	<unicode hex="0065"/>
+	<advance width="496"/>
+	<outline>
+		<contour>
+			<point x="46" y="242" type="curve"/>
+			<point x="46" y="83"/>
+			<point x="149" y="-12"/>
+			<point x="279" y="-12" type="curve"/>
+			<point x="345" y="-12"/>
+			<point x="397" y="11"/>
+			<point x="439" y="38" type="curve"/>
+			<point x="410" y="92" type="line"/>
+			<point x="374" y="69"/>
+			<point x="335" y="54"/>
+			<point x="289" y="54" type="curve"/>
+			<point x="196" y="54"/>
+			<point x="133" y="120"/>
+			<point x="127" y="225" type="curve"/>
+			<point x="455" y="225" type="line"/>
+			<point x="457" y="237"/>
+			<point x="458" y="253"/>
+			<point x="458" y="270" type="curve"/>
+			<point x="458" y="409"/>
+			<point x="388" y="498"/>
+			<point x="264" y="498" type="curve"/>
+			<point x="153" y="498"/>
+			<point x="46" y="401"/>
+		</contour>
+		<contour>
+			<point x="126" y="279" type="line"/>
+			<point x="136" y="377"/>
+			<point x="198" y="433"/>
+			<point x="266" y="433" type="curve"/>
+			<point x="342" y="433"/>
+			<point x="386" y="378"/>
+			<point x="386" y="279" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/eight.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/eight.glif
new file mode 100644
index 000000000..a8e044728
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/eight.glif
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="eight" format="2">
+	<unicode hex="0038"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="115" y="171" type="curve"/>
+			<point x="115" y="229"/>
+			<point x="153" y="276"/>
+			<point x="204" y="310" type="curve"/>
+			<point x="296" y="273"/>
+			<point x="377" y="243"/>
+			<point x="377" y="161" type="curve"/>
+			<point x="377" y="95"/>
+			<point x="326" y="49"/>
+			<point x="252" y="49" type="curve"/>
+			<point x="174" y="49"/>
+			<point x="115" y="100"/>
+		</contour>
+		<contour>
+			<point x="295" y="348" type="curve"/>
+			<point x="218" y="378"/>
+			<point x="148" y="410"/>
+			<point x="148" y="486" type="curve"/>
+			<point x="148" y="548"/>
+			<point x="192" y="589"/>
+			<point x="251" y="589" type="curve"/>
+			<point x="321" y="589"/>
+			<point x="362" y="539"/>
+			<point x="362" y="476" type="curve"/>
+			<point x="362" y="429"/>
+			<point x="338" y="386"/>
+		</contour>
+		<contour>
+			<point x="41" y="163" type="curve"/>
+			<point x="41" y="62"/>
+			<point x="130" y="-12"/>
+			<point x="250" y="-12" type="curve"/>
+			<point x="374" y="-12"/>
+			<point x="456" y="63"/>
+			<point x="456" y="158" type="curve"/>
+			<point x="456" y="244"/>
+			<point x="402" y="289"/>
+			<point x="345" y="322" type="curve"/>
+			<point x="345" y="326" type="line"/>
+			<point x="384" y="356"/>
+			<point x="433" y="413"/>
+			<point x="433" y="480" type="curve"/>
+			<point x="433" y="579"/>
+			<point x="364" y="650"/>
+			<point x="253" y="650" type="curve"/>
+			<point x="150" y="650"/>
+			<point x="72" y="584"/>
+			<point x="72" y="486" type="curve"/>
+			<point x="72" y="419"/>
+			<point x="114" y="372"/>
+			<point x="161" y="339" type="curve"/>
+			<point x="161" y="335" type="line"/>
+			<point x="101" y="303"/>
+			<point x="41" y="246"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/f.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/f.glif
new file mode 100644
index 000000000..7eaba0d14
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/f.glif
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="f" format="2">
+	<unicode hex="0066"/>
+	<advance width="292"/>
+	<outline>
+		<contour>
+			<point x="319" y="708" type="line"/>
+			<point x="297" y="717"/>
+			<point x="268" y="724"/>
+			<point x="238" y="724" type="curve"/>
+			<point x="141" y="724"/>
+			<point x="96" y="662"/>
+			<point x="96" y="563" type="curve"/>
+			<point x="96" y="486" type="line"/>
+			<point x="30" y="481" type="line"/>
+			<point x="30" y="419" type="line"/>
+			<point x="96" y="419" type="line"/>
+			<point x="96" y="0" type="line"/>
+			<point x="178" y="0" type="line"/>
+			<point x="178" y="419" type="line"/>
+			<point x="281" y="419" type="line"/>
+			<point x="281" y="486" type="line"/>
+			<point x="178" y="486" type="line"/>
+			<point x="178" y="563" type="line"/>
+			<point x="178" y="625"/>
+			<point x="200" y="657"/>
+			<point x="246" y="657" type="curve"/>
+			<point x="264" y="657"/>
+			<point x="283" y="653"/>
+			<point x="301" y="645" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/five.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/five.glif
new file mode 100644
index 000000000..a9fc7d224
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/five.glif
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="five" format="2">
+	<unicode hex="0035"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="25" y="75" type="line"/>
+			<point x="69" y="31"/>
+			<point x="132" y="-12"/>
+			<point x="234" y="-12" type="curve"/>
+			<point x="345" y="-12"/>
+			<point x="449" y="66"/>
+			<point x="449" y="204" type="curve"/>
+			<point x="449" y="342"/>
+			<point x="360" y="404"/>
+			<point x="251" y="404" type="curve"/>
+			<point x="212" y="404"/>
+			<point x="183" y="394"/>
+			<point x="153" y="378" type="curve"/>
+			<point x="170" y="567" type="line"/>
+			<point x="417" y="567" type="line"/>
+			<point x="417" y="638" type="line"/>
+			<point x="98" y="638" type="line"/>
+			<point x="77" y="331" type="line"/>
+			<point x="121" y="303" type="line"/>
+			<point x="159" y="328"/>
+			<point x="186" y="342"/>
+			<point x="230" y="342" type="curve"/>
+			<point x="312" y="342"/>
+			<point x="366" y="290"/>
+			<point x="366" y="202" type="curve"/>
+			<point x="366" y="113"/>
+			<point x="304" y="56"/>
+			<point x="226" y="56" type="curve"/>
+			<point x="151" y="56"/>
+			<point x="103" y="91"/>
+			<point x="65" y="129" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/four.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/four.glif
new file mode 100644
index 000000000..469fc2eec
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/four.glif
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="four" format="2">
+	<unicode hex="0034"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="104" y="242" type="line"/>
+			<point x="253" y="460" type="line"/>
+			<point x="271" y="491"/>
+			<point x="289" y="519"/>
+			<point x="305" y="550" type="curve"/>
+			<point x="309" y="550" type="line"/>
+			<point x="307" y="516"/>
+			<point x="304" y="461"/>
+			<point x="304" y="427" type="curve"/>
+			<point x="304" y="242" type="line"/>
+		</contour>
+		<contour>
+			<point x="469" y="242" type="line"/>
+			<point x="382" y="242" type="line"/>
+			<point x="382" y="638" type="line"/>
+			<point x="290" y="638" type="line"/>
+			<point x="17" y="230" type="line"/>
+			<point x="17" y="176" type="line"/>
+			<point x="304" y="176" type="line"/>
+			<point x="304" y="0" type="line"/>
+			<point x="382" y="0" type="line"/>
+			<point x="382" y="176" type="line"/>
+			<point x="469" y="176" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/g.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/g.glif
new file mode 100644
index 000000000..c2f630c4a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/g.glif
@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="g" format="2">
+	<unicode hex="0067"/>
+	<advance width="504"/>
+	<outline>
+		<contour>
+			<point x="117" y="-82" type="curve"/>
+			<point x="117" y="-54"/>
+			<point x="132" y="-25"/>
+			<point x="167" y="0" type="curve"/>
+			<point x="188" y="-6"/>
+			<point x="211" y="-8"/>
+			<point x="230" y="-8" type="curve"/>
+			<point x="314" y="-8" type="line"/>
+			<point x="377" y="-8"/>
+			<point x="412" y="-23"/>
+			<point x="412" y="-68" type="curve"/>
+			<point x="412" y="-119"/>
+			<point x="351" y="-167"/>
+			<point x="258" y="-167" type="curve"/>
+			<point x="170" y="-167"/>
+			<point x="117" y="-134"/>
+		</contour>
+		<contour>
+			<point x="45" y="-93" type="curve"/>
+			<point x="45" y="-177"/>
+			<point x="127" y="-224"/>
+			<point x="246" y="-224" type="curve"/>
+			<point x="397" y="-224"/>
+			<point x="492" y="-146"/>
+			<point x="492" y="-56" type="curve"/>
+			<point x="492" y="25"/>
+			<point x="435" y="60"/>
+			<point x="322" y="60" type="curve"/>
+			<point x="228" y="60" type="line"/>
+			<point x="162" y="60"/>
+			<point x="142" y="82"/>
+			<point x="142" y="113" type="curve"/>
+			<point x="142" y="140"/>
+			<point x="156" y="156"/>
+			<point x="173" y="171" type="curve"/>
+			<point x="195" y="160"/>
+			<point x="222" y="154"/>
+			<point x="246" y="154" type="curve"/>
+			<point x="345" y="154"/>
+			<point x="424" y="219"/>
+			<point x="424" y="323" type="curve"/>
+			<point x="424" y="364"/>
+			<point x="407" y="401"/>
+			<point x="384" y="423" type="curve"/>
+			<point x="484" y="423" type="line"/>
+			<point x="484" y="486" type="line"/>
+			<point x="315" y="486" type="line"/>
+			<point x="297" y="493"/>
+			<point x="273" y="498"/>
+			<point x="246" y="498" type="curve"/>
+			<point x="147" y="498"/>
+			<point x="63" y="431"/>
+			<point x="63" y="325" type="curve"/>
+			<point x="63" y="267"/>
+			<point x="94" y="220"/>
+			<point x="126" y="194" type="curve"/>
+			<point x="126" y="190" type="line"/>
+			<point x="101" y="173"/>
+			<point x="73" y="141"/>
+			<point x="73" y="100" type="curve"/>
+			<point x="73" y="62"/>
+			<point x="92" y="36"/>
+			<point x="116" y="21" type="curve"/>
+			<point x="116" y="17" type="line"/>
+			<point x="72" y="-13"/>
+			<point x="45" y="-52"/>
+		</contour>
+		<contour>
+			<point x="246" y="209" type="curve"/>
+			<point x="190" y="209"/>
+			<point x="143" y="254"/>
+			<point x="143" y="325" type="curve"/>
+			<point x="143" y="396"/>
+			<point x="189" y="438"/>
+			<point x="246" y="438" type="curve"/>
+			<point x="303" y="438"/>
+			<point x="349" y="396"/>
+			<point x="349" y="325" type="curve"/>
+			<point x="349" y="254"/>
+			<point x="302" y="209"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/h.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/h.glif
new file mode 100644
index 000000000..af38a9e62
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/h.glif
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="h" format="2">
+	<unicode hex="0068"/>
+	<advance width="544"/>
+	<outline>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="352" type="line"/>
+			<point x="213" y="401"/>
+			<point x="247" y="427"/>
+			<point x="297" y="427" type="curve"/>
+			<point x="361" y="427"/>
+			<point x="389" y="388"/>
+			<point x="389" y="297" type="curve"/>
+			<point x="389" y="0" type="line"/>
+			<point x="471" y="0" type="line"/>
+			<point x="471" y="308" type="line"/>
+			<point x="471" y="432"/>
+			<point x="425" y="498"/>
+			<point x="323" y="498" type="curve"/>
+			<point x="256" y="498"/>
+			<point x="207" y="462"/>
+			<point x="161" y="418" type="curve"/>
+			<point x="164" y="518" type="line"/>
+			<point x="164" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/i.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/i.glif
new file mode 100644
index 000000000..26694f39d
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/i.glif
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="i" format="2">
+	<unicode hex="0069"/>
+	<advance width="246"/>
+	<outline>
+		<contour>
+			<point x="124" y="586" type="curve"/>
+			<point x="156" y="586"/>
+			<point x="181" y="608"/>
+			<point x="181" y="639" type="curve"/>
+			<point x="181" y="671"/>
+			<point x="156" y="692"/>
+			<point x="124" y="692" type="curve"/>
+			<point x="92" y="692"/>
+			<point x="67" y="671"/>
+			<point x="67" y="639" type="curve"/>
+			<point x="67" y="608"/>
+			<point x="92" y="586"/>
+		</contour>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="486" type="line"/>
+			<point x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/j.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/j.glif
new file mode 100644
index 000000000..049d87f9a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/j.glif
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="j" format="2">
+	<unicode hex="006A"/>
+	<advance width="247"/>
+	<outline>
+		<contour>
+			<point x="83" y="-55" type="line"/>
+			<point x="83" y="-114"/>
+			<point x="71" y="-150"/>
+			<point x="23" y="-150" type="curve"/>
+			<point x="6" y="-150"/>
+			<point x="-11" y="-146"/>
+			<point x="-23" y="-142" type="curve"/>
+			<point x="-40" y="-204" type="line"/>
+			<point x="-23" y="-211"/>
+			<point x="2" y="-217"/>
+			<point x="32" y="-217" type="curve"/>
+			<point x="129" y="-217"/>
+			<point x="165" y="-154"/>
+			<point x="165" y="-55" type="curve"/>
+			<point x="165" y="486" type="line"/>
+			<point x="83" y="486" type="line"/>
+		</contour>
+		<contour>
+			<point x="125" y="586" type="curve"/>
+			<point x="156" y="586"/>
+			<point x="181" y="608"/>
+			<point x="181" y="639" type="curve"/>
+			<point x="181" y="671"/>
+			<point x="156" y="692"/>
+			<point x="125" y="692" type="curve"/>
+			<point x="93" y="692"/>
+			<point x="68" y="671"/>
+			<point x="68" y="639" type="curve"/>
+			<point x="68" y="608"/>
+			<point x="93" y="586"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/k.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/k.glif
new file mode 100644
index 000000000..96d5e8863
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/k.glif
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="k" format="2">
+	<unicode hex="006B"/>
+	<advance width="495"/>
+	<outline>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="163" y="0" type="line"/>
+			<point x="163" y="128" type="line"/>
+			<point x="254" y="234" type="line"/>
+			<point x="396" y="0" type="line"/>
+			<point x="486" y="0" type="line"/>
+			<point x="301" y="291" type="line"/>
+			<point x="464" y="486" type="line"/>
+			<point x="373" y="486" type="line"/>
+			<point x="166" y="230" type="line"/>
+			<point x="163" y="230" type="line"/>
+			<point x="163" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/l.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/l.glif
new file mode 100644
index 000000000..4f867ae83
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/l.glif
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="l" format="2">
+	<unicode hex="006C"/>
+	<advance width="255"/>
+	<outline>
+		<contour>
+			<point x="82" y="98" type="line"/>
+			<point x="82" y="27"/>
+			<point x="107" y="-12"/>
+			<point x="169" y="-12" type="curve"/>
+			<point x="191" y="-12"/>
+			<point x="205" y="-9"/>
+			<point x="216" y="-4" type="curve"/>
+			<point x="205" y="58" type="line"/>
+			<point x="196" y="56"/>
+			<point x="192" y="56"/>
+			<point x="187" y="56" type="curve"/>
+			<point x="175" y="56"/>
+			<point x="164" y="66"/>
+			<point x="164" y="92" type="curve"/>
+			<point x="164" y="712" type="line"/>
+			<point x="82" y="712" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/layerinfo.plist b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/layerinfo.plist
new file mode 100644
index 000000000..7cc969341
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/layerinfo.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>color</key>
+		<string>1,0.75,0,0.7</string>
+		<key>lib</key>
+		<dict>
+			<key>org.unifiedfontobject.normalizer.imageReferences</key>
+			<dict>
+			</dict>
+		</dict>
+	</dict>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/m.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/m.glif
new file mode 100644
index 000000000..183824c5a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/m.glif
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="m" format="2">
+	<unicode hex="006D"/>
+	<advance width="829"/>
+	<outline>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="352" type="line"/>
+			<point x="209" y="402"/>
+			<point x="250" y="427"/>
+			<point x="286" y="427" type="curve"/>
+			<point x="348" y="427"/>
+			<point x="377" y="388"/>
+			<point x="377" y="297" type="curve"/>
+			<point x="377" y="0" type="line"/>
+			<point x="459" y="0" type="line"/>
+			<point x="459" y="352" type="line"/>
+			<point x="504" y="402"/>
+			<point x="543" y="427"/>
+			<point x="581" y="427" type="curve"/>
+			<point x="642" y="427"/>
+			<point x="671" y="388"/>
+			<point x="671" y="297" type="curve"/>
+			<point x="671" y="0" type="line"/>
+			<point x="753" y="0" type="line"/>
+			<point x="753" y="308" type="line"/>
+			<point x="753" y="432"/>
+			<point x="705" y="498"/>
+			<point x="605" y="498" type="curve"/>
+			<point x="546" y="498"/>
+			<point x="496" y="460"/>
+			<point x="445" y="405" type="curve"/>
+			<point x="425" y="463"/>
+			<point x="385" y="498"/>
+			<point x="311" y="498" type="curve"/>
+			<point x="253" y="498"/>
+			<point x="202" y="462"/>
+			<point x="160" y="416" type="curve"/>
+			<point x="157" y="416" type="line"/>
+			<point x="150" y="486" type="line"/>
+			<point x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/n.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/n.glif
new file mode 100644
index 000000000..f8c1bcfab
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/n.glif
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="n" format="2">
+	<unicode hex="006E"/>
+	<advance width="547"/>
+	<outline>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="352" type="line"/>
+			<point x="213" y="401"/>
+			<point x="247" y="427"/>
+			<point x="297" y="427" type="curve"/>
+			<point x="361" y="427"/>
+			<point x="389" y="388"/>
+			<point x="389" y="297" type="curve"/>
+			<point x="389" y="0" type="line"/>
+			<point x="471" y="0" type="line"/>
+			<point x="471" y="308" type="line"/>
+			<point x="471" y="432"/>
+			<point x="425" y="498"/>
+			<point x="323" y="498" type="curve"/>
+			<point x="256" y="498"/>
+			<point x="206" y="462"/>
+			<point x="160" y="416" type="curve"/>
+			<point x="157" y="416" type="line"/>
+			<point x="150" y="486" type="line"/>
+			<point x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/nine.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/nine.glif
new file mode 100644
index 000000000..611ff422a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/nine.glif
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="nine" format="2">
+	<unicode hex="0039"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="235" y="310" type="curve"/>
+			<point x="156" y="310"/>
+			<point x="117" y="362"/>
+			<point x="117" y="445" type="curve"/>
+			<point x="117" y="529"/>
+			<point x="166" y="585"/>
+			<point x="228" y="585" type="curve"/>
+			<point x="309" y="585"/>
+			<point x="358" y="519"/>
+			<point x="369" y="395" type="curve"/>
+			<point x="326" y="334"/>
+			<point x="276" y="310"/>
+		</contour>
+		<contour>
+			<point x="51" y="55" type="line"/>
+			<point x="86" y="17"/>
+			<point x="137" y="-12"/>
+			<point x="205" y="-12" type="curve"/>
+			<point x="332" y="-12"/>
+			<point x="448" y="87"/>
+			<point x="448" y="343" type="curve"/>
+			<point x="448" y="548"/>
+			<point x="354" y="650"/>
+			<point x="228" y="650" type="curve"/>
+			<point x="126" y="650"/>
+			<point x="40" y="567"/>
+			<point x="40" y="445" type="curve"/>
+			<point x="40" y="314"/>
+			<point x="111" y="248"/>
+			<point x="221" y="248" type="curve"/>
+			<point x="274" y="248"/>
+			<point x="331" y="279"/>
+			<point x="371" y="330" type="curve"/>
+			<point x="368" y="126"/>
+			<point x="292" y="56"/>
+			<point x="202" y="56" type="curve"/>
+			<point x="162" y="56"/>
+			<point x="123" y="76"/>
+			<point x="97" y="107" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/o.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/o.glif
new file mode 100644
index 000000000..04eb4b2c8
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/o.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="o" format="2">
+	<unicode hex="006F"/>
+	<advance width="542"/>
+	<outline>
+		<contour>
+			<point x="46" y="242" type="curve"/>
+			<point x="46" y="81"/>
+			<point x="152" y="-12"/>
+			<point x="271" y="-12" type="curve"/>
+			<point x="390" y="-12"/>
+			<point x="496" y="81"/>
+			<point x="496" y="242" type="curve"/>
+			<point x="496" y="405"/>
+			<point x="390" y="498"/>
+			<point x="271" y="498" type="curve"/>
+			<point x="152" y="498"/>
+			<point x="46" y="405"/>
+		</contour>
+		<contour>
+			<point x="131" y="242" type="curve"/>
+			<point x="131" y="354"/>
+			<point x="188" y="430"/>
+			<point x="271" y="430" type="curve"/>
+			<point x="355" y="430"/>
+			<point x="411" y="354"/>
+			<point x="411" y="242" type="curve"/>
+			<point x="411" y="131"/>
+			<point x="355" y="56"/>
+			<point x="271" y="56" type="curve"/>
+			<point x="188" y="56"/>
+			<point x="131" y="131"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/one.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/one.glif
new file mode 100644
index 000000000..57fa5f5dd
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/one.glif
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="one" format="2">
+	<unicode hex="0031"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="79" y="0" type="line"/>
+			<point x="439" y="0" type="line"/>
+			<point x="439" y="68" type="line"/>
+			<point x="307" y="68" type="line"/>
+			<point x="307" y="638" type="line"/>
+			<point x="244" y="638" type="line"/>
+			<point x="209" y="617"/>
+			<point x="167" y="601"/>
+			<point x="109" y="591" type="curve"/>
+			<point x="109" y="538" type="line"/>
+			<point x="225" y="538" type="line"/>
+			<point x="225" y="68" type="line"/>
+			<point x="79" y="68" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/p.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/p.glif
new file mode 100644
index 000000000..52939c6a6
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/p.glif
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="p" format="2">
+	<unicode hex="0070"/>
+	<advance width="555"/>
+	<outline>
+		<contour>
+			<point x="162" y="44" type="line"/>
+			<point x="207" y="9"/>
+			<point x="252" y="-12"/>
+			<point x="297" y="-12" type="curve"/>
+			<point x="408" y="-12"/>
+			<point x="507" y="85"/>
+			<point x="507" y="250" type="curve"/>
+			<point x="507" y="401"/>
+			<point x="440" y="498"/>
+			<point x="315" y="498" type="curve"/>
+			<point x="258" y="498"/>
+			<point x="204" y="467"/>
+			<point x="160" y="430" type="curve"/>
+			<point x="157" y="430" type="line"/>
+			<point x="150" y="486" type="line"/>
+			<point x="82" y="486" type="line"/>
+			<point x="82" y="-205" type="line"/>
+			<point x="164" y="-205" type="line"/>
+			<point x="164" y="-41" type="line"/>
+		</contour>
+		<contour>
+			<point x="164" y="108" type="curve"/>
+			<point x="164" y="363" type="line"/>
+			<point x="212" y="406"/>
+			<point x="253" y="429"/>
+			<point x="294" y="429" type="curve"/>
+			<point x="386" y="429"/>
+			<point x="422" y="357"/>
+			<point x="422" y="250" type="curve"/>
+			<point x="422" y="130"/>
+			<point x="363" y="57"/>
+			<point x="283" y="57" type="curve"/>
+			<point x="251" y="57"/>
+			<point x="208" y="71"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/q.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/q.glif
new file mode 100644
index 000000000..405bf97e2
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/q.glif
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="q" format="2">
+	<unicode hex="0071"/>
+	<advance width="550"/>
+	<outline>
+		<contour>
+			<point x="47" y="242" type="curve"/>
+			<point x="47" y="80"/>
+			<point x="126" y="-12"/>
+			<point x="248" y="-12" type="curve"/>
+			<point x="304" y="-12"/>
+			<point x="355" y="18"/>
+			<point x="394" y="54" type="curve"/>
+			<point x="390" y="-32" type="line"/>
+			<point x="390" y="-205" type="line"/>
+			<point x="473" y="-205" type="line"/>
+			<point x="473" y="486" type="line"/>
+			<point x="407" y="486" type="line"/>
+			<point x="399" y="440" type="line"/>
+			<point x="397" y="440" type="line"/>
+			<point x="353" y="478"/>
+			<point x="314" y="498"/>
+			<point x="258" y="498" type="curve"/>
+			<point x="147" y="498"/>
+			<point x="47" y="400"/>
+		</contour>
+		<contour>
+			<point x="132" y="243" type="curve"/>
+			<point x="132" y="354"/>
+			<point x="194" y="429"/>
+			<point x="272" y="429" type="curve"/>
+			<point x="312" y="429"/>
+			<point x="349" y="415"/>
+			<point x="390" y="378" type="curve"/>
+			<point x="390" y="124" type="line"/>
+			<point x="350" y="79"/>
+			<point x="311" y="57"/>
+			<point x="266" y="57" type="curve"/>
+			<point x="181" y="57"/>
+			<point x="132" y="127"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/r.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/r.glif
new file mode 100644
index 000000000..576ed615d
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/r.glif
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="r" format="2">
+	<unicode hex="0072"/>
+	<advance width="347"/>
+	<outline>
+		<contour>
+			<point x="82" y="0" type="line"/>
+			<point x="164" y="0" type="line"/>
+			<point x="164" y="312" type="line"/>
+			<point x="197" y="394"/>
+			<point x="246" y="424"/>
+			<point x="287" y="424" type="curve"/>
+			<point x="307" y="424"/>
+			<point x="318" y="421"/>
+			<point x="334" y="416" type="curve"/>
+			<point x="350" y="488" type="line"/>
+			<point x="334" y="495"/>
+			<point x="319" y="498"/>
+			<point x="298" y="498" type="curve"/>
+			<point x="243" y="498"/>
+			<point x="193" y="459"/>
+			<point x="160" y="398" type="curve"/>
+			<point x="157" y="398" type="line"/>
+			<point x="150" y="486" type="line"/>
+			<point x="82" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/s.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/s.glif
new file mode 100644
index 000000000..d2d236bf7
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/s.glif
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="s" format="2">
+	<unicode hex="0073"/>
+	<advance width="419"/>
+	<outline>
+		<contour>
+			<point x="28" y="55" type="line"/>
+			<point x="74" y="17"/>
+			<point x="140" y="-12"/>
+			<point x="209" y="-12" type="curve"/>
+			<point x="324" y="-12"/>
+			<point x="387" y="54"/>
+			<point x="387" y="133" type="curve"/>
+			<point x="387" y="225"/>
+			<point x="309" y="254"/>
+			<point x="239" y="280" type="curve"/>
+			<point x="184" y="301"/>
+			<point x="131" y="318"/>
+			<point x="131" y="364" type="curve"/>
+			<point x="131" y="401"/>
+			<point x="159" y="434"/>
+			<point x="220" y="434" type="curve"/>
+			<point x="263" y="434"/>
+			<point x="298" y="416"/>
+			<point x="331" y="391" type="curve"/>
+			<point x="370" y="443" type="line"/>
+			<point x="333" y="473"/>
+			<point x="280" y="498"/>
+			<point x="219" y="498" type="curve"/>
+			<point x="114" y="498"/>
+			<point x="52" y="438"/>
+			<point x="52" y="360" type="curve"/>
+			<point x="52" y="278"/>
+			<point x="128" y="245"/>
+			<point x="197" y="220" type="curve"/>
+			<point x="250" y="200"/>
+			<point x="308" y="178"/>
+			<point x="308" y="128" type="curve"/>
+			<point x="308" y="86"/>
+			<point x="276" y="52"/>
+			<point x="212" y="52" type="curve"/>
+			<point x="154" y="52"/>
+			<point x="111" y="76"/>
+			<point x="69" y="110" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/seven.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/seven.glif
new file mode 100644
index 000000000..74534293f
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/seven.glif
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="seven" format="2">
+	<unicode hex="0037"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="177" y="0" type="curve"/>
+			<point x="262" y="0" type="line"/>
+			<point x="273" y="249"/>
+			<point x="304" y="394"/>
+			<point x="455" y="587" type="curve"/>
+			<point x="455" y="638" type="line"/>
+			<point x="44" y="638" type="line"/>
+			<point x="44" y="567" type="line"/>
+			<point x="362" y="567" type="line"/>
+			<point x="236" y="392"/>
+			<point x="188" y="240"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/six.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/six.glif
new file mode 100644
index 000000000..fb35437dc
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/six.glif
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="six" format="2">
+	<unicode hex="0036"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="268" y="53" type="curve"/>
+			<point x="187" y="53"/>
+			<point x="138" y="120"/>
+			<point x="128" y="244" type="curve"/>
+			<point x="171" y="304"/>
+			<point x="221" y="328"/>
+			<point x="261" y="328" type="curve"/>
+			<point x="340" y="328"/>
+			<point x="379" y="276"/>
+			<point x="379" y="193" type="curve"/>
+			<point x="379" y="109"/>
+			<point x="331" y="53"/>
+		</contour>
+		<contour>
+			<point x="445" y="582" type="line"/>
+			<point x="409" y="621"/>
+			<point x="360" y="650"/>
+			<point x="291" y="650" type="curve"/>
+			<point x="164" y="650"/>
+			<point x="48" y="551"/>
+			<point x="48" y="295" type="curve"/>
+			<point x="48" y="90"/>
+			<point x="143" y="-12"/>
+			<point x="268" y="-12" type="curve"/>
+			<point x="371" y="-12"/>
+			<point x="457" y="71"/>
+			<point x="457" y="193" type="curve"/>
+			<point x="457" y="324"/>
+			<point x="385" y="390"/>
+			<point x="275" y="390" type="curve"/>
+			<point x="223" y="390"/>
+			<point x="166" y="359"/>
+			<point x="126" y="310" type="curve"/>
+			<point x="130" y="512"/>
+			<point x="205" y="581"/>
+			<point x="294" y="581" type="curve"/>
+			<point x="334" y="581"/>
+			<point x="373" y="562"/>
+			<point x="399" y="531" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/space.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/space.glif
new file mode 100644
index 000000000..5b98e781a
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/space.glif
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="space" format="2">
+	<unicode hex="0020"/>
+	<advance width="202"/>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/t.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/t.glif
new file mode 100644
index 000000000..ca8cca274
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/t.glif
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="t" format="2">
+	<unicode hex="0074"/>
+	<advance width="338"/>
+	<outline>
+		<contour>
+			<point x="96" y="150" type="line"/>
+			<point x="96" y="54"/>
+			<point x="131" y="-12"/>
+			<point x="235" y="-12" type="curve"/>
+			<point x="265" y="-12"/>
+			<point x="298" y="-3"/>
+			<point x="325" y="6" type="curve"/>
+			<point x="309" y="68" type="line"/>
+			<point x="293" y="62"/>
+			<point x="271" y="55"/>
+			<point x="254" y="55" type="curve"/>
+			<point x="198" y="55"/>
+			<point x="179" y="89"/>
+			<point x="179" y="149" type="curve"/>
+			<point x="179" y="419" type="line"/>
+			<point x="310" y="419" type="line"/>
+			<point x="310" y="486" type="line"/>
+			<point x="179" y="486" type="line"/>
+			<point x="179" y="622" type="line"/>
+			<point x="110" y="622" type="line"/>
+			<point x="100" y="486" type="line"/>
+			<point x="24" y="481" type="line"/>
+			<point x="24" y="419" type="line"/>
+			<point x="96" y="419" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/three.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/three.glif
new file mode 100644
index 000000000..8bf93f9e3
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/three.glif
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="three" format="2">
+	<unicode hex="0033"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="26" y="78" type="line"/>
+			<point x="69" y="31"/>
+			<point x="134" y="-12"/>
+			<point x="236" y="-12" type="curve"/>
+			<point x="353" y="-12"/>
+			<point x="446" y="57"/>
+			<point x="446" y="170" type="curve"/>
+			<point x="446" y="258"/>
+			<point x="385" y="314"/>
+			<point x="308" y="332" type="curve"/>
+			<point x="308" y="336" type="line"/>
+			<point x="377" y="362"/>
+			<point x="424" y="411"/>
+			<point x="424" y="488" type="curve"/>
+			<point x="424" y="591"/>
+			<point x="344" y="650"/>
+			<point x="233" y="650" type="curve"/>
+			<point x="158" y="650"/>
+			<point x="99" y="616"/>
+			<point x="50" y="570" type="curve"/>
+			<point x="94" y="518" type="line"/>
+			<point x="132" y="556"/>
+			<point x="177" y="583"/>
+			<point x="230" y="583" type="curve"/>
+			<point x="298" y="583"/>
+			<point x="340" y="544"/>
+			<point x="340" y="482" type="curve"/>
+			<point x="340" y="415"/>
+			<point x="295" y="363"/>
+			<point x="159" y="363" type="curve"/>
+			<point x="159" y="300" type="line"/>
+			<point x="311" y="300"/>
+			<point x="363" y="249"/>
+			<point x="363" y="173" type="curve"/>
+			<point x="363" y="102"/>
+			<point x="308" y="56"/>
+			<point x="231" y="56" type="curve"/>
+			<point x="156" y="56"/>
+			<point x="106" y="92"/>
+			<point x="68" y="132" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/two.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/two.glif
new file mode 100644
index 000000000..239397fd2
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/two.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="two" format="2">
+	<unicode hex="0032"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="40" y="0" type="line"/>
+			<point x="452" y="0" type="line"/>
+			<point x="452" y="71" type="line"/>
+			<point x="267" y="71" type="line"/>
+			<point x="234" y="71"/>
+			<point x="195" y="68"/>
+			<point x="160" y="65" type="curve"/>
+			<point x="311" y="223"/>
+			<point x="420" y="342"/>
+			<point x="420" y="462" type="curve"/>
+			<point x="420" y="575"/>
+			<point x="347" y="650"/>
+			<point x="229" y="650" type="curve"/>
+			<point x="146" y="650"/>
+			<point x="89" y="611"/>
+			<point x="36" y="553" type="curve"/>
+			<point x="83" y="506" type="line"/>
+			<point x="120" y="549"/>
+			<point x="166" y="583"/>
+			<point x="219" y="583" type="curve"/>
+			<point x="300" y="583"/>
+			<point x="340" y="531"/>
+			<point x="340" y="458" type="curve"/>
+			<point x="340" y="355"/>
+			<point x="232" y="240"/>
+			<point x="40" y="49" type="curve"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/u.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/u.glif
new file mode 100644
index 000000000..b2c6ee1f4
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/u.glif
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="u" format="2">
+	<unicode hex="0075"/>
+	<advance width="544"/>
+	<outline>
+		<contour>
+			<point x="75" y="178" type="line"/>
+			<point x="75" y="54"/>
+			<point x="121" y="-12"/>
+			<point x="224" y="-12" type="curve"/>
+			<point x="291" y="-12"/>
+			<point x="339" y="23"/>
+			<point x="384" y="76" type="curve"/>
+			<point x="387" y="76" type="line"/>
+			<point x="394" y="0" type="line"/>
+			<point x="462" y="0" type="line"/>
+			<point x="462" y="486" type="line"/>
+			<point x="380" y="486" type="line"/>
+			<point x="380" y="141" type="line"/>
+			<point x="334" y="84"/>
+			<point x="299" y="59"/>
+			<point x="249" y="59" type="curve"/>
+			<point x="185" y="59"/>
+			<point x="158" y="98"/>
+			<point x="158" y="189" type="curve"/>
+			<point x="158" y="486" type="line"/>
+			<point x="75" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/v.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/v.glif
new file mode 100644
index 000000000..f65f651f1
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/v.glif
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="v" format="2">
+	<unicode hex="0076"/>
+	<advance width="467"/>
+	<outline>
+		<contour>
+			<point x="187" y="0" type="line"/>
+			<point x="283" y="0" type="line"/>
+			<point x="455" y="486" type="line"/>
+			<point x="374" y="486" type="line"/>
+			<point x="282" y="210" type="line"/>
+			<point x="268" y="162"/>
+			<point x="252" y="113"/>
+			<point x="238" y="67" type="curve"/>
+			<point x="234" y="67" type="line"/>
+			<point x="219" y="113"/>
+			<point x="203" y="162"/>
+			<point x="189" y="210" type="curve"/>
+			<point x="97" y="486" type="line"/>
+			<point x="12" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/w.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/w.glif
new file mode 100644
index 000000000..4b46b8922
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/w.glif
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="w" format="2">
+	<unicode hex="0077"/>
+	<advance width="718"/>
+	<outline>
+		<contour>
+			<point x="159" y="0" type="line"/>
+			<point x="255" y="0" type="line"/>
+			<point x="323" y="260" type="line"/>
+			<point x="336" y="306"/>
+			<point x="346" y="352"/>
+			<point x="357" y="401" type="curve"/>
+			<point x="361" y="401" type="line"/>
+			<point x="373" y="352"/>
+			<point x="382" y="307"/>
+			<point x="394" y="261" type="curve"/>
+			<point x="464" y="0" type="line"/>
+			<point x="564" y="0" type="line"/>
+			<point x="694" y="486" type="line"/>
+			<point x="616" y="486" type="line"/>
+			<point x="545" y="205" type="line"/>
+			<point x="535" y="159"/>
+			<point x="526" y="115"/>
+			<point x="515" y="70" type="curve"/>
+			<point x="511" y="70" type="line"/>
+			<point x="500" y="115"/>
+			<point x="489" y="159"/>
+			<point x="477" y="205" type="curve"/>
+			<point x="401" y="486" type="line"/>
+			<point x="321" y="486" type="line"/>
+			<point x="246" y="205" type="line"/>
+			<point x="234" y="160"/>
+			<point x="224" y="115"/>
+			<point x="213" y="70" type="curve"/>
+			<point x="209" y="70" type="line"/>
+			<point x="200" y="115"/>
+			<point x="191" y="159"/>
+			<point x="180" y="205" type="curve"/>
+			<point x="108" y="486" type="line"/>
+			<point x="24" y="486" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/x.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/x.glif
new file mode 100644
index 000000000..6df2fab13
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/x.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="x" format="2">
+	<unicode hex="0078"/>
+	<advance width="446"/>
+	<outline>
+		<contour>
+			<point x="14" y="0" type="line"/>
+			<point x="100" y="0" type="line"/>
+			<point x="166" y="113" type="line"/>
+			<point x="182" y="143"/>
+			<point x="198" y="172"/>
+			<point x="215" y="200" type="curve"/>
+			<point x="219" y="200" type="line"/>
+			<point x="237" y="172"/>
+			<point x="255" y="142"/>
+			<point x="272" y="113" type="curve"/>
+			<point x="343" y="0" type="line"/>
+			<point x="432" y="0" type="line"/>
+			<point x="274" y="245" type="line"/>
+			<point x="421" y="486" type="line"/>
+			<point x="335" y="486" type="line"/>
+			<point x="276" y="379" type="line"/>
+			<point x="261" y="353"/>
+			<point x="246" y="325"/>
+			<point x="232" y="298" type="curve"/>
+			<point x="228" y="298" type="line"/>
+			<point x="211" y="325"/>
+			<point x="195" y="353"/>
+			<point x="180" y="379" type="curve"/>
+			<point x="115" y="486" type="line"/>
+			<point x="26" y="486" type="line"/>
+			<point x="173" y="254" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/y.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/y.glif
new file mode 100644
index 000000000..02cc6d634
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/y.glif
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="y" format="2">
+	<unicode hex="0079"/>
+	<advance width="467"/>
+	<outline>
+		<contour>
+			<point x="49" y="-134" type="curve"/>
+			<point x="33" y="-199" type="line"/>
+			<point x="49" y="-205"/>
+			<point x="68" y="-209"/>
+			<point x="90" y="-209" type="curve"/>
+			<point x="188" y="-209"/>
+			<point x="238" y="-136"/>
+			<point x="272" y="-40" type="curve"/>
+			<point x="455" y="486" type="line"/>
+			<point x="375" y="486" type="line"/>
+			<point x="288" y="217" type="line"/>
+			<point x="275" y="174"/>
+			<point x="261" y="124"/>
+			<point x="247" y="80" type="curve"/>
+			<point x="243" y="80" type="line"/>
+			<point x="228" y="125"/>
+			<point x="211" y="175"/>
+			<point x="196" y="217" type="curve"/>
+			<point x="97" y="486" type="line"/>
+			<point x="12" y="486" type="line"/>
+			<point x="207" y="-1" type="line"/>
+			<point x="196" y="-37" type="line"/>
+			<point x="176" y="-97"/>
+			<point x="141" y="-141"/>
+			<point x="86" y="-141" type="curve"/>
+			<point x="74" y="-141"/>
+			<point x="59" y="-137"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/z.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/z.glif
new file mode 100644
index 000000000..4632d3a1d
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/z.glif
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="z" format="2">
+	<unicode hex="007A"/>
+	<advance width="425"/>
+	<outline>
+		<contour>
+			<point x="31" y="0" type="line"/>
+			<point x="399" y="0" type="line"/>
+			<point x="399" y="67" type="line"/>
+			<point x="135" y="67" type="line"/>
+			<point x="391" y="442" type="line"/>
+			<point x="391" y="486" type="line"/>
+			<point x="59" y="486" type="line"/>
+			<point x="59" y="419" type="line"/>
+			<point x="287" y="419" type="line"/>
+			<point x="31" y="44" type="line"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/glyphs/zero.glif b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/zero.glif
new file mode 100644
index 000000000..a75a769b7
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/glyphs/zero.glif
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="zero" format="2">
+	<unicode hex="0030"/>
+	<advance width="497"/>
+	<outline>
+		<contour>
+			<point x="249" y="-12" type="curve"/>
+			<point x="376" y="-12"/>
+			<point x="453" y="107"/>
+			<point x="453" y="321" type="curve"/>
+			<point x="453" y="535"/>
+			<point x="376" y="650"/>
+			<point x="249" y="650" type="curve"/>
+			<point x="121" y="650"/>
+			<point x="44" y="535"/>
+			<point x="44" y="321" type="curve"/>
+			<point x="44" y="107"/>
+			<point x="121" y="-12"/>
+		</contour>
+		<contour>
+			<point x="249" y="54" type="curve"/>
+			<point x="174" y="54"/>
+			<point x="124" y="134"/>
+			<point x="124" y="321" type="curve"/>
+			<point x="124" y="508"/>
+			<point x="174" y="584"/>
+			<point x="249" y="584" type="curve"/>
+			<point x="323" y="584"/>
+			<point x="373" y="508"/>
+			<point x="373" y="321" type="curve"/>
+			<point x="373" y="134"/>
+			<point x="323" y="54"/>
+		</contour>
+	</outline>
+</glyph>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/layercontents.plist b/tests/tx_data/input/alt-missing-glif.ufo/layercontents.plist
new file mode 100644
index 000000000..12949b6fb
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/layercontents.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<array>
+		<array>
+			<string>foreground</string>
+			<string>glyphs</string>
+		</array>
+		<array>
+			<string>com.adobe.type.processedglyphs</string>
+			<string>glyphs.com.adobe.type.processedglyphs</string>
+		</array>
+	</array>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/lib.plist b/tests/tx_data/input/alt-missing-glif.ufo/lib.plist
new file mode 100644
index 000000000..2349d17ad
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/lib.plist
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>com.typemytype.robofont.compileSettings.autohint</key>
+		<true/>
+		<key>com.typemytype.robofont.compileSettings.checkOutlines</key>
+		<false/>
+		<key>com.typemytype.robofont.compileSettings.createDummyDSIG</key>
+		<true/>
+		<key>com.typemytype.robofont.compileSettings.decompose</key>
+		<false/>
+		<key>com.typemytype.robofont.compileSettings.generateFormat</key>
+		<integer>0</integer>
+		<key>com.typemytype.robofont.compileSettings.releaseMode</key>
+		<false/>
+		<key>com.typemytype.robofont.italicSlantOffset</key>
+		<integer>0</integer>
+		<key>com.typemytype.robofont.segmentType</key>
+		<string>curve</string>
+		<key>com.typemytype.robofont.shouldAddPointsInSplineConversion</key>
+		<integer>1</integer>
+		<key>public.glyphOrder</key>
+		<array>
+			<string>.notdef</string>
+			<string>space</string>
+			<string>A</string>
+			<string>B</string>
+			<string>C</string>
+			<string>D</string>
+			<string>E</string>
+			<string>F</string>
+			<string>G</string>
+			<string>H</string>
+			<string>I</string>
+			<string>J</string>
+			<string>K</string>
+			<string>L</string>
+			<string>M</string>
+			<string>N</string>
+			<string>O</string>
+			<string>P</string>
+			<string>Q</string>
+			<string>R</string>
+			<string>S</string>
+			<string>T</string>
+			<string>U</string>
+			<string>V</string>
+			<string>W</string>
+			<string>X</string>
+			<string>Y</string>
+			<string>Z</string>
+			<string>a</string>
+			<string>b</string>
+			<string>c</string>
+			<string>d</string>
+			<string>e</string>
+			<string>f</string>
+			<string>g</string>
+			<string>h</string>
+			<string>i</string>
+			<string>j</string>
+			<string>k</string>
+			<string>l</string>
+			<string>m</string>
+			<string>n</string>
+			<string>o</string>
+			<string>p</string>
+			<string>q</string>
+			<string>r</string>
+			<string>s</string>
+			<string>t</string>
+			<string>u</string>
+			<string>v</string>
+			<string>w</string>
+			<string>x</string>
+			<string>y</string>
+			<string>z</string>
+			<string>zero</string>
+			<string>one</string>
+			<string>two</string>
+			<string>three</string>
+			<string>four</string>
+			<string>five</string>
+			<string>six</string>
+			<string>seven</string>
+			<string>eight</string>
+			<string>nine</string>
+		</array>
+	</dict>
+</plist>
diff --git a/tests/tx_data/input/alt-missing-glif.ufo/metainfo.plist b/tests/tx_data/input/alt-missing-glif.ufo/metainfo.plist
new file mode 100644
index 000000000..555d9ce4c
--- /dev/null
+++ b/tests/tx_data/input/alt-missing-glif.ufo/metainfo.plist
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>creator</key>
+		<string>com.github.fonttools.ufoLib</string>
+		<key>formatVersion</key>
+		<integer>3</integer>
+	</dict>
+</plist>
diff --git a/tests/tx_test.py b/tests/tx_test.py
index ec02918fe..4cf027d8a 100644
--- a/tests/tx_test.py
+++ b/tests/tx_test.py
@@ -1648,3 +1648,23 @@ def test_bug1641_wrong_glyphorder():
     expected_path = generate_ps_dump(expected_path)
     output_path = generate_ps_dump(output_path)
     assert differ([expected_path, output_path, '-s', PFA_SKIP[0]])
+
+
+def test_alt_missing_glyph():
+    """
+    Test case where alt layer has a glyph that default layer doesn't.
+    """
+    msg = (b"tx: (ufr) Warning: glyph 'B' is in the processed layer"
+           b" but not in the default layer.")
+    input_path = get_input_path("alt-missing-glif.ufo")
+    expected_path = get_expected_path("alt-missing-glif.pfb")
+    output_path = get_temp_file_path()
+    arg = CMD + ['-s', '-e', '-a', '-o', 't1', '-f',
+                 input_path, output_path]
+    stderr_path = runner(arg)
+    with open(stderr_path, 'rb') as f:
+        output = f.read()
+    assert msg in output
+    expected_path = generate_ps_dump(expected_path)
+    output_path = generate_ps_dump(output_path)
+    assert differ([expected_path, output_path])