Maven build fails with Java 9

[prog893]

Building master with JDK 9.0.1, Maven 3.5.2 results in following output:

[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] CSPARQL-engine/csparql-core/src/main/java/eu/larkc/csparql/core/old_parser/TreeBox.java:[53,16] cannot find symbol
  symbol:   class Regexp
  location: package sun.misc
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Multi Module CSPARQL Parent Project ................ SUCCESS [  0.002 s]
[INFO] csparql-common ..................................... SUCCESS [  0.565 s]
[INFO] csparql-cep-api .................................... SUCCESS [  0.014 s]
[INFO] csparql-cep-esper .................................. SUCCESS [  0.021 s]
[INFO] csparql-sparql-api ................................. SUCCESS [  0.015 s]
[INFO] csparql-sparql-jena ................................ SUCCESS [  0.021 s]
[INFO] csparql-sesame ..................................... SUCCESS [  0.084 s]
[INFO] csparql-core ....................................... FAILURE [  1.802 s]
[INFO] csparql-ui ......................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.659 s
[INFO] Finished at: 2018-02-11T16:15:28+09:00
[INFO] Final Memory: 18M/62M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project csparql-core: Compilation failure
[ERROR] CSPARQL-engine/csparql-core/src/main/java/eu/larkc/csparql/core/old_parser/TreeBox.java:[53,16] cannot find symbol
[ERROR]   symbol:   class Regexp
[ERROR]   location: package sun.misc
[ERROR] 
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :csparql-core

This seems to be caused by JDK-8137056: a lot of things have been moved from sun.misc to jdk.internal.misc.

It seems that it is possible to use private modules by fixing pom.

[prog893]

Actually, sun.misc.Regexp was removed as a part of cleanup in 2014: https://bugs.java.com/view_bug.do?bug_id=8037781