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https://issues.apache.org/jira/browse/MCOMPILER-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17509353#comment-17509353
]
Basil Crow commented on MCOMPILER-415:
--------------------------------------
The fix for the underlying OpenJDK issue has been backported to {{jdk11u-dev}}
in [openjdk/jdk11u-dev#919|https://github.com/openjdk/jdk11u-dev/pull/919]
toward OpenJDK 11.0.16, currently scheduled for a July 2022 GA.
> NullPointerException from javac when compiling AntlrWorks-Jank
> --------------------------------------------------------------
>
> Key: MCOMPILER-415
> URL: https://issues.apache.org/jira/browse/MCOMPILER-415
> Project: Maven Compiler Plugin
> Issue Type: Bug
> Affects Versions: 3.1
> Environment: macOS 10.14.6, iMac Pro, AdoptOpenJDK 9, OpenJDK 11.0.2,
> AdoptOpenJDK 13.0.2
> Reporter: Andrew Janke
> Assignee: Robert Scholte
> Priority: Minor
> Attachments: antlrworks-jank-mvn-compile-NPE-02-debug.log,
> antlrworks-jank-mvn-compile-NPE-02.log,
> antlrworks-jank-mvn-compile-NPE-debug.log, antlrworks-jank-mvn-compile-NPE.log
>
>
> I'm working on a project called AntlrWorks-Jank, an attempt to revive the
> defunct ANTLRWorks application. https://github.com/apjanke/antlrworks2-jank
> When compiling the latest work-in-progress version of my code, I'm getting a
> NullPointerException apparently raised inside the javac code when it's called
> by the Maven Compiler Plugin.
> {code:java}
> [antlrworks-jank] $ mvn -e compile
> [INFO] Error stacktraces are turned on.
> [...]
> [INFO] works-editor-antlr4 ................................ FAILURE [ 1.026
> s]
> [INFO] antlr-works-editor ................................. SKIPPED
> [INFO] tvl-editor-whitespace .............................. SKIPPED
> [INFO] works-editor-antlr3 ................................ SKIPPED
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 2.028 s
> [INFO] Finished at: 2020-05-08T03:01:54-04:00
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)
> on project works-editor-antlr4: Fatal error compiling: CompilerException:
> NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile
> (default-compile) on project works-editor-antlr4: Fatal error compiling
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:215)
> [...]
> Caused by: java.lang.NullPointerException
> at com.sun.tools.javac.main.JavaCompiler.readSourceFile
> (JavaCompiler.java:825)
> at
> com.sun.tools.javac.processing.JavacProcessingEnvironment$ImplicitCompleter.complete
> (JavacProcessingEnvironment.java:1510)
> at com.sun.tools.javac.code.Symbol.complete (Symbol.java:633)
> at com.sun.tools.javac.code.Symbol$ClassSymbol.complete (Symbol.java:1314)
> at com.sun.tools.javac.code.Type$ClassType.complete (Type.java:1139)
> at com.sun.tools.javac.code.Type$ClassType.getTypeArguments
> (Type.java:1065)
> at com.sun.tools.javac.code.Printer.visitClassType (Printer.java:237)
> at com.sun.tools.javac.code.Printer.visitClassType (Printer.java:52)
> at com.sun.tools.javac.code.Type$ClassType.accept (Type.java:992)
> at com.sun.tools.javac.code.Printer.visit (Printer.java:136)
> at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument
> (AbstractDiagnosticFormatter.java:197)
> at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments
> (AbstractDiagnosticFormatter.java:165)
> at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage
> (BasicDiagnosticFormatter.java:111)
> at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage
> (BasicDiagnosticFormatter.java:67)
> at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument
> (AbstractDiagnosticFormatter.java:183)
> at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments
> (AbstractDiagnosticFormatter.java:165)
> at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage
> (BasicDiagnosticFormatter.java:111)
> at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage
> (BasicDiagnosticFormatter.java:67)
> at com.sun.tools.javac.util.JCDiagnostic.getMessage
> (JCDiagnostic.java:771)
> at
> com.sun.tools.javac.api.ClientCodeWrapper$DiagnosticSourceUnwrapper.getMessage
> (ClientCodeWrapper.java:799)
> at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess
> (JavaxToolsCompiler.java:149)
> at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile
> (JavacCompiler.java:169)
> at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute
> (AbstractCompilerMojo.java:785)
> at org.apache.maven.plugin.compiler.CompilerMojo.execute
> (CompilerMojo.java:129)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:137)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:210)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:156)
> {code}
> The full code to reproduce is on the NPE-during-compile tag in that repo:
> https://github.com/apjanke/antlrworks2-jank/tree/NPE-during-compile.
> I *think* I'm running the latest 3.8.1 version of maven-compiler-plugin,
> since I'm not specifying a version for it in my POMs. Seems to happen with
> Java 9, 11, and 13 (which I'm selecting by setting the $JAVA_HOME environment
> variable before running `mvn -e compile`).
> Would this be a bug in maven-compiler-plugin? Or actually a bug in javac? Or
> something else?
> Find output of `mvn -e compile &>antlrworks-jank-mvn-compile-NPE.log` and
> `mvn -X -e compile &>antlrworks-jank-mvn-compile-NPE-debug.log` attached.
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