The following test failed in the Valhalla CI:

java/lang/Thread/virtual/stress/Skynet.java#Z

Here's a snippet from the log file:

#section:main
----------messages:(7/456)----------
command: main -XX:+UnlockDiagnosticVMOptions -XX:+UseZGC -XX:+ZVerifyOops -XX:ZCollectionInterval=0.01 -Xmx1500m Skynet
reason: User specified action: run main/othervm/timeout=1600 -XX:+UnlockDiagnosticVMOptions -XX:+UseZGC -XX:+ZVerifyOops -XX:ZCollectionInterval=0.01 -Xmx1500m Skynet
started: Thu Jan 08 08:35:49.317 GMT 2026
Mode: othervm [/othervm specified]
Process id: 74241
finished: Thu Jan 08 08:35:56.948 GMT 2026
elapsed time (seconds): 7.631
----------configuration:(0/0)----------
----------System.out:(1/32)----------
Result: 499999499998 in 6973 ms
----------System.err:(12/637)----------
java.lang.RuntimeException: Expected 499999500000
at Skynet.skynet(Skynet.java:62)
at Skynet.main(Skynet.java:48)
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:1516)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Expected 499999500000
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Expected 499999500000
----------rerun:(44/6723)*----------

I'm starting this issue in hotspot/runtime since the test is a virtual
threads stress test. There are currently 53 of these test failures
in the Valhalla CI and they occur on all platforms in Mach5.