The following test failed in the JDK20 CI:

compiler/jvmci/compilerToVM/IsMatureTest.java

Here's a snippet from the log file:

#section:main
----------messages:(5/683)----------
command: main -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI compiler.jvmci.compilerToVM.IsMatureTest
reason: User specified action: run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI compiler.jvmci.compilerToVM.IsMatureTest
Mode: othervm [/othervm specified, test or library overrides a system module]
Additional options from @modules: --add-modules java.base,jdk.internal.vm.ci --add-exports java.base/jdk.internal.misc=ALL-UNNAMED --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot=ALL-UNNAMED
elapsed time (seconds): 1.131
----------configuration:(6/594)----------
Boot Layer
  add modules: java.base jdk.internal.vm.ci
  add exports: java.base/jdk.internal.misc ALL-UNNAMED
               jdk.internal.vm.ci/jdk.vm.ci.hotspot ALL-UNNAMED
  patch: jdk.internal.vm.ci /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S45873/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/d01a5b22-be89-43f8-89a4-ae66486c904a/runs/f5d536d1-b957-4d76-8c5f-15552710efd5/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_compiler_2/classes/3/compiler/jvmci/common/patches/jdk.internal.vm.ci

----------System.out:(0/0)----------
----------System.err:(15/1077)----------
java.lang.RuntimeException: Unexpected isMature state for multiple times invoked method: expected false to equal true
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertEquals(Asserts.java:205)
at jdk.test.lib.Asserts.assertEQ(Asserts.java:178)
at compiler.jvmci.compilerToVM.IsMatureTest.test(IsMatureTest.java:83)
at compiler.jvmci.compilerToVM.IsMatureTest.main(IsMatureTest.java:59)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:1589)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Unexpected isMature state for multiple times invoked method: expected false to equal true
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Unexpected isMature state for multiple times invoked method: expected false to equal true
----------rerun:(49/9309)*----------