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https://issues.apache.org/jira/browse/MCOMPILER-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17481151#comment-17481151
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Tommy Becker commented on MCOMPILER-413:
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FYI this seems to be fixed in 3.9.0.
> Parameters does not work when only release is specified
> -------------------------------------------------------
>
> Key: MCOMPILER-413
> URL: https://issues.apache.org/jira/browse/MCOMPILER-413
> Project: Maven Compiler Plugin
> Issue Type: Bug
> Affects Versions: 3.8.1
> Environment: Arch Linux, OpenJDK 11.0.6.u10, Maven 3.6.3
> Reporter: Jiri Kraml
> Priority: Minor
>
> Compiling a project with the following maven-compiler-plugin configuration
> does not produce parameter name metadata in the class files:
> {{<{color:#0033b3}configuration{color}>}}
> {{ <{color:#0033b3}release{color}>9</{color:#0033b3}release{color}>}}
> {{
> <{color:#0033b3}parameters{color}>true</{color:#0033b3}parameters{color}>}}
> {{</{color:#0033b3}configuration{color}>}}
> I believe this is a mistake, because
> {{javac --release 9 -parameters Test.java}}
> will produce the metadata.
> This behavior is due to dependency
> {{org.codehaus.plexus:plexus-compiler-javac:2.8.4}}, where in
> {{org.codehaus.plexus.compiler.javac.JavacCompiler}}, line 312, the function
> {{isPreJava18}} is called. This function does not evaluate the release
> property, only source and compilerVersion.
> Available workarounds in {{pom.xml}} are additionally specifying {{source}}
> or explicitly specifying the {{-parameters}} parameter in the plugin
> configuration.
>
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