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https://issues.apache.org/jira/browse/MNG-8296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guillaume Nodet reassigned MNG-8296:
------------------------------------
Assignee: Guillaume Nodet
> Maven 4 fails on <extension>true<extension>
> -------------------------------------------
>
> Key: MNG-8296
> URL: https://issues.apache.org/jira/browse/MNG-8296
> Project: Maven
> Issue Type: Bug
> Components: Core
> Affects Versions: 4.0.0-beta-4
> Reporter: Michael Keppler
> Assignee: Guillaume Nodet
> Priority: Major
> Fix For: 4.0.0-beta-5
>
> Attachments: image-2024-10-09-08-57-47-501.png
>
>
> Maven fails when extensions are declared as part of a plugin (that is, not as
> extension xml tag), as described in variant 1 of
> https://maven.apache.org/guides/mini/guide-using-extensions.html
> !image-2024-10-09-08-57-47-501.png!
> For reproduction:
> * checkout [https://github.com/checkstyle/eclipse-cs.git]
> * run mvn 4 without goals
>
> {noformat}
> [INFO] Scanning for projects...
> [ERROR] Internal error: java.lang.IllegalArgumentException: Unknown
> extensible enum value 'xml' -> [Help 1]
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.IllegalArgumentException: Unknown extensible enum value 'xml'
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:157)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:981)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:291)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:208)
> at
> jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
> at java.lang.reflect.Method.invoke(Method.java:580)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:255)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:201)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:361)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:314)
> Caused by: java.lang.IllegalArgumentException: Unknown extensible enum value
> 'xml'
> at
> org.apache.maven.api.services.ExtensibleEnumRegistry.lambda$require$0(ExtensibleEnumRegistry.java:33)
> at java.util.Optional.orElseThrow(Optional.java:403)
> at
> org.apache.maven.api.services.ExtensibleEnumRegistry.require(ExtensibleEnumRegistry.java:33)
> at
> org.apache.maven.internal.impl.DefaultTypeRegistry.lambda$require$1(DefaultTypeRegistry.java:94)
> at
> java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
> at
> org.apache.maven.internal.impl.DefaultTypeRegistry.require(DefaultTypeRegistry.java:87)
> at
> org.apache.maven.internal.impl.DefaultTypeRegistry.lookup(DefaultTypeRegistry.java:80)
> at
> org.apache.maven.internal.impl.DefaultPackagingRegistry.lookup(DefaultPackagingRegistry.java:88)
> at
> org.apache.maven.internal.impl.model.DefaultLifecycleBindingsInjector.injectLifecycleBindings(DefaultLifecycleBindingsInjector.java:69)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder.build(DefaultModelBuilder.java:575)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder.build(DefaultModelBuilder.java:198)
> at
> org.apache.maven.project.DefaultProjectBuilder$BuildSession.doBuild(DefaultProjectBuilder.java:825)
> at
> org.apache.maven.project.DefaultProjectBuilder$BuildSession.lambda$build$6(DefaultProjectBuilder.java:794)
> at java.util.concurrent.FutureTask.run(FutureTask.java:317)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
> at java.lang.Thread.run(Thread.java:1583){noformat}
> Deleting just the line "<extension>true</extension>" avoids the exception (of
> course the build still doesn't succeed then).
> I have several projects that use the Maven Tycho extension (for building
> Eclipse plugins). All of those builds fail similarly.
>
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