Bump Error Prone to 2.50.0, requires Java 21 - #517
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Error Prone 2.37.0 reads JCCompilationUnit.endPositions, which JDK 27 removed (JDK-8372948), so javac-with-errorprone fails on JDK 27. Error Prone fixed that in 2.47.0, and every release since 2.43.0 needs a JDK 21 runtime, so the errorprone module and the ITs move their javaVersion to 21. Since 2.46.0 Error Prone on JDK 21 also refuses to run without -XDaddTypeAnnotationsToSymbol=true, so the two ITs pass it.
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Error Prone 2.37.0 reads
JCCompilationUnit.endPositions, which JDK 27 removed in JDK-8372948, sojavac-with-errorpronefails on JDK 27 withNoSuchFieldError. Error Prone fixed that in 2.47.0 (google/error-prone#5473, #5482), and every release since 2.43.0 needs a JDK 21 runtime, so this raisesjavaVersionto 21 for the errorprone module and the ITs and updates the module's site page. Since 2.46.0, Error Prone on JDK 21 refuses to start without-XDaddTypeAnnotationsToSymbol=true, so the two Error Prone ITs pass that flag. The unit test now derives its javac warning count from the runtime feature version instead of listing JDKs, because javac 21 and later all add the three-source 8obsolescence warnings.The remaining JDK 27 test failures in
plexus-compiler-javacandplexus-compiler-eclipseare unrelated to Error Prone; #518 fixes them on top of this PR.Verified: on JDK 27,
mvn verify -pl plexus-compilers/plexus-compiler-javac-errorprone,plexus-compiler-its -am -Dversion.maven-invoker-plugin=3.10.2-SNAPSHOT→ errorprone module tests green, 12 of 12 ITs pass, bytecode enforcer passes. The invoker snapshot is needed only because 3.10.1 ships a Groovy that cannot read Java 27 class files; CI on JDK 21 and 25 is unaffected.This change was created with AI assistance.