During the testing of JDK-8337066 I encountered the following failure:

java.lang.RuntimeException: verifyB testUU_unsafe_BasIH: arrays must have same content: gold[0][1544] = -70 result[0][1544] = -65
[2024-09-27T21:06:37,873Z] at compiler.loopopts.superword.TestAlignVectorFuzzer.verifyB(TestAlignVectorFuzzer.java:1280)
[2024-09-27T21:06:37,873Z] at compiler.loopopts.superword.TestAlignVectorFuzzer.verify(TestAlignVectorFuzzer.java:1256)
[2024-09-27T21:06:37,873Z] at compiler.loopopts.superword.TestAlignVectorFuzzer.main(TestAlignVectorFuzzer.java:580)
[2024-09-27T21:06:37,873Z] at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
[2024-09-27T21:06:37,873Z] at java.base/java.lang.reflect.Method.invoke(Method.java:573)
[2024-09-27T21:06:37,873Z] at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
[2024-09-27T21:06:37,873Z] at java.base/java.lang.Thread.run(Thread.java:1576)

Reproducing it seems to be problematic and specifying the seed value doesn't seem to help.