Description

AGP <8.6 used to allow running Java 8 toolchain for tests. This is no longer possible because of a fix applied for Robolectric too widely.

Repro

Clone https://github.com/TWiStErRob/repros/tree/main/agp/agp860-java8test
gradlew test
Observe error (Logs section)

Logs

agp860-java8test$ gradlew test
Could not write standard input to Gradle Test Executor 7.
java.io.IOException: The pipe is being closed
        at java.base/java.io.FileOutputStream.writeBytes(Native Method)
        at java.base/java.io.FileOutputStream.write(FileOutputStream.java:349)
        at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81)
        at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142)
        at org.gradle.process.internal.streams.ExecOutputHandleRunner.writeBuffer(ExecOutputHandleRunner.java:98)
        at org.gradle.process.internal.streams.ExecOutputHandleRunner.forwardContent(ExecOutputHandleRunner.java:85)
        at org.gradle.process.internal.streams.ExecOutputHandleRunner.run(ExecOutputHandleRunner.java:64)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:48)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:833)

> Task :testDebugUnitTest FAILED
Picked up JAVA_TOOL_OPTIONS: -Xms32M -Xmx256M -D-XX:+UseG1GC -D-XX:+PrintCommandLineFlags
Unrecognized option: --add-opens=java.base/java.io=ALL-UNNAMED
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':testDebugUnitTest'.
> Process 'Gradle Test Executor 7' 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.

BUILD FAILED in 1s
24 actionable tasks: 3 executed, 21 up-to-date

Root cause

Unrecognized option: --add-opens=java.base/java.io=ALL-UNNAMED

is caused by the fix for https://issuetracker.google.com/issues/248929512. It can't be unconditionally added as different Java versions support different flags. This particular flag (--add-opens) was introduced as part of Jigsaw in Java 9.

Versions

Studio Build: N/A
Version of Gradle Plugin: 8.6.0
Version of Gradle: 8.10
Version of Java: 17+ running Gradle, 8 toolchain running tests
OS: any