mockkStatic(System::class) causes java.lang.StackOverflowError with java 17

[StefanMijic-TomTom]

Just be aware about usual MockK support pattern. Tickets are checked from time to time, replied, discussed, labeled, e.t.c. But real fixes are applied in a month-two month period in a bunch. If you think this is unacceptable, go on, join the project, change the world.

Please remove sections wisely

Below information is actually needed to make all the process of fixing faster. Choose main points. Don't blindly follow this as a set of rules. Don't waste much time. Usually, the main thing is to have a good reproducible minimal code.

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• [x] I am running the latest version
• [x] I checked the documentation and found no answer
• [x] I checked to make sure that this issue has not already been filed

Expected Behavior

Finished test.

Current Behavior

When running test from mockk-java17-issue.zip project with java 17, mockkStatic(System::class) causes java.lang.StackOverflowError. This is not the case with java 11.

Failure Information (for bugs)

Exception: java.lang.StackOverflowError thrown from the UncaughtExceptionHandler in thread "Test worker"

Steps to Reproduce

Please provide detailed steps for reproducing the issue.

1. extract project
2. ./gradlew test

Context

• MockK version: 1.13.8
• OS: Ununtu 18.04
• Kotlin version: 1.9.10
• JDK version: 17
• JUnit version: kotlin-test-junit5
• Type of test: unit test

Failure Logs

Exception: java.lang.StackOverflowError thrown from the UncaughtExceptionHandler in thread "Test worker"

Task :app:test FAILED

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:test'.

Process 'Gradle Test Executor 7' finished with non-zero exit value 1 This problem might be caused by incorrect test process configuration. For more on test execution, please refer to https://docs.gradle.org/8.4/userguide/java_testing.html#sec:test_execution in the Gradle documentation.

Stack trace

// -----------------------[ YOUR STACK STARTS HERE ] -----------------------
* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:test'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:148)
        at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:282)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:146)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:134)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:74)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:78)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
        at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:42)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:331)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:318)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.lambda$execute$0(DefaultTaskExecutionGraph.java:314)
        at org.gradle.internal.operations.CurrentBuildOperationRef.with(CurrentBuildOperationRef.java:80)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:314)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:303)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:463)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:380)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:47)
Caused by: org.gradle.process.internal.ExecException: Process 'Gradle Test Executor 8' finished with non-zero exit value 1
This problem might be caused by incorrect test process configuration.
For more on test execution, please refer to https://docs.gradle.org/8.4/userguide/java_testing.html#sec:test_execution in the Gradle documentation.
        at org.gradle.api.internal.tasks.testing.worker.ForkingTestClassProcessor.stop(ForkingTestClassProcessor.java:159)
        at org.gradle.api.internal.tasks.testing.processors.RestartEveryNTestClassProcessor.endBatch(RestartEveryNTestClassProcessor.java:77)
        at org.gradle.api.internal.tasks.testing.processors.RestartEveryNTestClassProcessor.stop(RestartEveryNTestClassProcessor.java:62)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at org.gradle.internal.dispatch.FailureHandlingDispatch.dispatch(FailureHandlingDispatch.java:30)
        at org.gradle.internal.dispatch.AsyncDispatch.dispatchMessages(AsyncDispatch.java:87)
        at org.gradle.internal.dispatch.AsyncDispatch.access$000(AsyncDispatch.java:36)
        at org.gradle.internal.dispatch.AsyncDispatch$1.run(AsyncDispatch.java:71)
        at org.gradle.internal.concurrent.InterruptibleRunnable.run(InterruptibleRunnable.java:42)
        at org.gradle.internal.operations.CurrentBuildOperationRef.with(CurrentBuildOperationRef.java:80)
        at org.gradle.internal.operations.CurrentBuildOperationPreservingRunnable.run(CurrentBuildOperationPreservingRunnable.java:51)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:47)
// -----------------------[ YOUR STACK TRACE ENDS HERE ] -----------------------

[sschuberth]

I'm also seeing this wehn trying to do

mockkStatic(System::class)
every { System.exit(any<Int>()) } just runs
xsbt.boot.Boot.main(command)
unmockkStatic(System::class)

which loops with this stacktrace:

getDeclaredMethod:2669, Class (java.lang) [2]
allowSecurityManager:194, System (java.lang)
getSecurityManager:484, System (java.lang)
getDeclaredMethod:2669, Class (java.lang) [1]
allowSecurityManager:194, System (java.lang)
getSecurityManager:484, System (java.lang)
loadClass:180, ClassLoaders$AppClassLoader (jdk.internal.loader)
loadClass:525, ClassLoader (java.lang)
staticProxy:37, StaticProxyMaker (io.mockk.proxy.jvm)
staticMockk:39, JvmStaticMockFactory (io.mockk.impl.instantiation)

[sschuberth]

This probably is related to https://github.com/mockk/mockk/issues/191.