vscjava.vscode-java-test-0.43.1 includes JaCoCo 0.8.12 instead of 0.8.13

[woerzberger]

When I run JUnit test with code coverage in VS Code, I get a plenty of

java.lang.instrument.IllegalClassFormatException: Error while instrumenting com/sun/tools/attach/VirtualMachine with JaCoCo 0.8.12.202403310830/dbfb6f2.
	at org.jacoco.agent.rt.internal_aeaf9ab.CoverageTransformer.transform(CoverageTransformer.java:94)
...
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 69
	at org.jacoco.agent.rt.internal_aeaf9ab.asm.ClassReader.<init>(ClassReader.java:200)

The class file major revision is emitted by Java 25.

JaCoCo 0.8.13 can instrument class files with major revision 69.

According to the CHANGELOG, vscode-java-test 0.43.1 has been updated to to Jacoco 0.8.13. However, after installing vscode-java-test-0.43.1, I find .vscode\extensions\vscjava.vscode-java-test-0.43.1\server\jacocoagent.jar still to be version 0.8.12.

I can manually fix the bug, by replacing .vscode\extensions\vscjava.vscode-java-test-0.43.1\server\jacocoagent.jar by https://repo.maven.apache.org/maven2/org/jacoco/org.jacoco.agent/0.8.13/org.jacoco.agent-0.8.13.jar

Maybe, the bug is in this line: https://github.com/microsoft/vscode-java-test/blob/0.43.1/scripts/buildJdtlsExt.js#L79

[github-actions]

Hi René Wörzberger (@woerzberger), I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

The issue is a known regression in the 0.43.1 updater script: the existing jacocoagent.jar isn’t overwritten when you upgrade, so you still get 0.8.12 instead of 0.8.13.

• Workaround (from #1780):

• Uninstall the Java Test extension and then install it anew to force the updated jacocoagent.jar (0.8.13) to be copied.
• Or manually delete {extension}/server/jacocoagent.jar before upgrading so the new jar is applied.

• Manual fix: replace {extension}/server/jacocoagent.jar with the 0.8.13 jar from Maven Central:
https://repo.maven.apache.org/maven2/org/jacoco/org.jacoco.agent/0.8.13/org.jacoco.agent-0.8.13.jar

• Root cause: buildJdtlsExt.js skips copying if the jar already exists (see #1780).

Other references with low confidence

Click to expand

• Coverage is not displayed for tests with @QuarkusTest (#1719): version mismatch between project Jacoco and extension Jacoco
• Extension not loading – jacoco error (#1759): discusses ASM/Jacoco conflicts in JDT-LS

The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!