Coverage generator Minion exited abnormally due to UNKNOWN_ERROR

[MosheElisha]

Hi,

When I run mvn clean test org.pitest:pitest-maven:mutationCoverage site on attached project minimal-junit5-pitest-v0.12.zip, I get the error Caused by: org.pitest.util.PitError: Coverage generation minion exited abnormally!.

Full maven output with -X attached mvn.out.txt).

When changing pitest-junit5-plugin to version 0.8, everything works fine with two SURVIVED mutations.
When changing pitest-junit5-plugin to version 0.9, the build does not fail but report shows NO_COVERAGE on all mutations.
When changing pitest-junit5-plugin to version 0.10, 0.11 and 0.12 - the build fails with an error.

Two relevant stack traces in the output file:
1.

    at org.pitest.coverage.execute.DefaultCoverageGenerator.gatherCoverageData (DefaultCoverageGenerator.java:148)
    at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage (DefaultCoverageGenerator.java:89)
    at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage (DefaultCoverageGenerator.java:51)
    at org.pitest.mutationtest.tooling.MutationCoverage.runReport (MutationCoverage.java:115)
    at org.pitest.mutationtest.tooling.EntryPoint.execute (EntryPoint.java:121)
    at org.pitest.mutationtest.tooling.EntryPoint.execute (EntryPoint.java:51)
    at org.pitest.maven.RunPitStrategy.execute (RunPitStrategy.java:35)
...

    at org.pitest.util.Unchecked.translateCheckedException (Unchecked.java:20)
    at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage (DefaultCoverageGenerator.java:105)
    at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage (DefaultCoverageGenerator.java:51)
    at org.pitest.mutationtest.tooling.MutationCoverage.runReport (MutationCoverage.java:115)
    at org.pitest.mutationtest.tooling.EntryPoint.execute (EntryPoint.java:121)
    at org.pitest.mutationtest.tooling.EntryPoint.execute (EntryPoint.java:51)
    at org.pitest.maven.RunPitStrategy.execute (RunPitStrategy.java:35)
    at org.pitest.maven.AbstractPitMojo.analyse (AbstractPitMojo.java:463)
    at org.pitest.maven.AbstractPitMojo.execute (AbstractPitMojo.java:404)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
...

This project is based on https://github.com/tomekkaczanowski/minimal-junit5-pitest with few version upgrades.