The following test failed in the JDK20 CI:

javax/swing/JComponent/7154030/bug7154030.java

Here's a snippet from the log file:

#section:main
----------messages:(7/259)----------
command: main bug7154030
reason: User specified action: run main bug7154030
started: Tue Nov 22 20:29:27 GMT 2022
Mode: othervm
Additional options from @modules: --add-modules java.desktop
finished: Tue Nov 22 20:29:31 GMT 2022
elapsed time (seconds): 4.007
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(0/0)----------
----------System.err:(11/614)----------
java.lang.Exception: Failed to show opaque button
at bug7154030.main(bug7154030.java:137)
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:125)
at java.base/java.lang.Thread.run(Thread.java:1591)

JavaTest Message: Test threw exception: java.lang.Exception: Failed to show opaque button
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.Exception: Failed to show opaque button
----------rerun:(41/7179)*----------