[GDB] MatchLog enum kind raises TypeError when printed

[Robertorosmaninho]

When debugging the MatchLog, it is desirable that every field be correctly printed without errors to the users/developers.

To reproduce this issue:

K Definition:

module TEST
  imports INT

  syntax Foo ::= foo(Int) | bar()
  rule [test]: foo(I) => bar() requires I ==Int 0
endmodule

kompile and krun:

kompile test.k --enable-llvm-debug && krun -cPGM='foo(1)' --debugger

On GDB:

(gdb) k start

...

(gdb)  python print(gdb.lookup_global_symbol('TEST.test.match').value()(gdb.parse_and_eval('subject')))
void

(gdb) python print(gdb.lookup_global_symbol("getMatchLog").value()()[0])
Python Exception <class 'TypeError'>: 'NoneType' object is not subscriptable

{kind = MatchLog::FUNCTION, function = 0x2f6560 <str_lit_side_condition_133> "side_condition_133", debugName = 0x2f6546 <str_lit_TEST.test.sc> "TEST.test.sc", result = 0x7ffff5500048, args = std::vector of length 1, capacity 1 = {0x7ffff5400088}, pattern = 0x0, subject = 0x0, sort = 0x0}

(gdb) python  print(gdb.lookup_global_symbol("getMatchLog").value()()[0]['kind'])
Python Exception <class 'TypeError'>: 'NoneType' object is not subscriptable
MatchLog::FUNCTION

Simple solutions: Work with Int or String
Harder solution: Workaround to pretty print the enum

[Robertorosmaninho]

This error mainly affects the developer side, as getting information from the MatchLog isn't something most users would use since it is only useful to compute the match function. Therefore, I'll mark this issue as ToDo.