There are a large number of different failures of the javax/swing/JList/6462008/bug6462008.java on Windows, Linux and macOS. Yet there are no failures in CI so far.

----------System.out:(0/0)----------
----------System.err:(28/1910)----------
java.lang.reflect.InvocationTargetException
        at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1312)
        at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1287)
        at java.desktop/javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1474)
        at bug6462008.checkSelectionAL(bug6462008.java:378)
        at bug6462008.testListSelection(bug6462008.java:135)
        at bug6462008.main(bug6462008.java:69)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:565)
        at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
        at java.base/java.lang.Thread.run(Thread.java:1447)
Caused by: java.lang.RuntimeException: 0 is supposed to be selected
        at bug6462008.checkSelectionNonThreadSafe(bug6462008.java:416)
        at bug6462008$8.run(bug6462008.java:382)
        at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
        at …


The error message differs between failures:

Caused by: java.lang.RuntimeException: anchor is 1, should be 0
        at bug6462008.checkSelectionNonThreadSafe(bug6462008.java:394)
        at bug6462008$8.run(bug6462008.java:382)

Caused by: java.lang.RuntimeException: anchor is -1, should be 4
        at bug6462008.checkSelectionNonThreadSafe(bug6462008.java:394)
        at bug6462008$8.run(bug6462008.java:382)

Caused by: java.lang.RuntimeException: anchor is -1, should be 0
        at bug6462008.checkSelectionNonThreadSafe(bug6462008.java:394)
        at bug6462008$8.run(bug6462008.java:382)

Caused by: java.lang.RuntimeException: 0 is supposed to be selected
        at bug6462008.checkSelectionNonThreadSafe(bug6462008.java:416)
        at bug6462008$8.run(bug6462008.java:382)

The above failures are observed in 21u, 25 (mainline)…