IssueTracker

We are already filtering out all class under the directory META-INF/versions. Looking at the error message it looks as if the META-INF/versions directory is not located in the root of the jar, but in org/gradle/internal/impldep/META-INF/versions. Can you share the (location of the) JAR where you see this issue?

Also see b/134377851, which is a feature request to consider preferring class files from the latest version for multi-release JAR's.

This is happening in this jar: https://repo1.maven.org/maven2/dev/gradleplugins/gradle-api/8.0/gradle-api-8.0.jar. Those are the Nooke redistributed artifacts.

My current workaround is to filter them out before passing them to R8. Given org/gradle/internal/impldep/META-INF/versions is not a standard location (sorry I missed that before, I thought that could be a possibility), I think it's fair to say R8 is working as intended. Feel free to close this issue.

Also see b/134377851, which is a feature request to consider preferring class files from the latest version for multi-release JAR's.

Even better! Will follow the discussion there. Thanks again for the help 🙏

Thank you for reporting back and confirming that the class files are indeed under org/gradle/internal/impldep/META-INF/versions.