Gradle test task fails when run test with intellij coverage and kover plugin enabled

[Corje]

Enable kover plugin in build script.
Try to run any test with coverage. Test should be run via gradle - Preferences | Build, Execution, Deployment | Build Tools | Gradle | Run tests using Gradle. Right click on run gutter near a test and select Run test .. with coverage
Test task is failed with:

Error: LinkageError occurred while loading main class worker.org.gradle.process.internal.worker.GradleWorkerMain
	java.lang.ClassFormatError: Duplicate field name "__$lineHits$__" with signature "[I" in class file worker/org/gradle/process/internal/worker/GradleWorkerMain
Class transformation time: 0.00528344s for 211 classes or 2.504E-5s per class
Class transformation time: 0.026119615s for 136 classes or 1.9205599264705882E-4s per class
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':test'.
> Process 'Gradle Test Executor 45' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

Disabling kover-plugin solves the problem. Also with setting Preferences | Build, Execution, Deployment | Build Tools | Gradle | Run tests using Intellij IDEA run test with coverage is ok.

Reproduced with: 'org.jetbrains.kover-plugin' version '0.4', intellij-coverage-agent-1.0.596.jar, Kotlin JVM Gradle plugin 1.6.0-RC-303, gradle-7.1

[Corje]

In kotlinx-kover 0.2.2 it fails with different reported errors:

...
---- IntelliJ IDEA coverage runner ---- 
tracing ...
include patterns:
exclude patterns:
[2021.09.28 16:55:03] (Coverage): Error during class instrumentation: com/intellij/rt/coverage/util/ClassNameUtil: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
Exception in thread "main" java.lang.NullPointerException
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:76)
[2021.09.28 16:55:04] (Coverage): Unexpected error during applying branch data to class worker.org.gradle.internal.classloader.FilteringClassLoader: java.lang.NullPointerException
Class transformation time: 0.024064203s for 133 classes or 1.8093385714285714E-4s per class
Class transformation time: 0.018251085s for 177 classes or 1.0311347457627118E-4s per class
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':test'.
> Process 'Gradle Test Executor 6' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0.
You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
See https://docs.gradle.org/7.1/userguide/command_line_interface.html#sec:command_line_warnings
BUILD FAILED in 601ms
3 actionable tasks: 1 executed, 2 up-to-date

[mhmtszr]

We have the same issue.

[gustavodaquino]

Same here, with 0.5.0-RC2 version.

---- IntelliJ IDEA coverage runner ---- 
tracing ...
include patterns:
exclude patterns:
[2022.01.28 00:32:10] (Coverage): Error during class instrumentation: com/intellij/rt/coverage/util/ClassNameUtil: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
Exception in thread "main" java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:513)
	at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:525)
Caused by: java.lang.NullPointerException
Caused by: java.lang.NullPointerException

	at org.jacoco.agent.rt.internal_3570298.PreMain.premain(PreMain.java:48)
	... 6 more
FATAL ERROR in native method: processing of -javaagent failed, processJavaStart failed
*** java.lang.instrument ASSERTION FAILED ***: "result" with message agent load/premain call failed at ./src/java.instrument/share/native/libinstrument/JPLISAgent.c line: 422

[elmodeer]

I am facing this issue now. But I got it solved by changing the kotlinx.kover.api.CoverageEngine type from IntelliJ to Jacoco, although I am using IntelliJ

[mskonovalov]

Similar issue here
I can see a bunch of errors like

[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: com/intellij/rt/coverage/util/ClassNameUtil: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: sun/launcher/LauncherHelper: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: sun/launcher/LauncherHelper: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/loader/URLClassPath$3: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/loader/URLClassPath$3: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/loader/URLClassPath$Loader: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/loader/URLClassPath$Loader: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/loader/URLClassPath$JarLoader: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/loader/URLClassPath$JarLoader: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/access/JavaUtilZipFileAccess: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
[2022.05.16 14:43:57] (Coverage): Error during class instrumentation: jdk/internal/access/JavaUtilZipFileAccess: java.lang.ClassCircularityError: com/intellij/rt/coverage/util/ClassNameUtil
...

and test is taking forever to start (on JDK 17).
Any hints?

[mskonovalov]

It could be on the Intellij side https://youtrack.jetbrains.com/issue/IDEA-283432

[Zyphuris55]

For those still with this issue, please see the comment I made here as a workaround.
#138 (comment)

[shanshin]

Duplicates #267