The following test failed in the JDK20 CI:

serviceability/sa/ClhsdbCDSJstackPrintAll.java

Here's a snippet from the log file:

Thread 22 Address: 0x000001b03e65d470

Java Stack Trace for SteadyStateThread
Thread state = BLOCKED
 - private static void steadyState(java.lang.Object) @0x000001b037c04ce8 @bci = 7, line = 535, pc = 0x000001b0237ff265 (Compiled)
- waiting to lock <0x00000000d7d3d578> (a java.lang.Object)
 - public void run() @0x000001b037c052e0 @bci = 4, line = 542, pc = 0x000001b0237feddc, oop = 0x00000000d7d3d588 (Compiled)


hsdb> + quit
];
 stderr: [Error: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
at java.base/java.util.Objects.checkIndex(Objects.java:385)
at java.base/java.util.ArrayList.get(ArrayList.java:427)
at jdk.hotspot.agent/sun.jvm.hotspot.runtime.StackValueCollection.get(StackValueCollection.java:41)
at jdk.hotspot.agent/sun.jvm.hotspot.runtime.StackValueCollection.oopHandleAt(StackValueCollection.java:54)
at jdk.hotspot.agent/sun.jvm.hotspot.ui.classbrowser.HTMLGenerator.genHTMLForJavaStackTrace(HTMLGenerator.java:1940)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor$45.doit(CommandProcessor.java:1660)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2212)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2182)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.run(CommandProcessor.java:2053)
at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.run(CLHSDB.java:112)
at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.main(CLHSDB.java:44)
at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runCLHSDB(SALauncher.java:281)
at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:500)
]
 exitValue = 0

java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: '^Error: .*$' found in stderr: 'Error: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0'
at ClhsdbCDSJstackPrintAll.main(ClhsdbCDSJstackPrintAll.java:117)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1591)
Caused by: java.lang.RuntimeException: '^Error: .*$' found in stderr: 'Error: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0'
at jdk.test.lib.process.OutputAnalyzer.shouldNotMatch(OutputAnalyzer.java:404)
at ClhsdbLauncher.runCmd(ClhsdbLauncher.java:154)
at ClhsdbLauncher.run(ClhsdbLauncher.java:203)
at ClhsdbCDSJstackPrintAll.main(ClhsdbCDSJstackPrintAll.java:113)
... 4 more

JavaTest Message: Test threw exception: java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: '^Error: .*$' found in stderr: 'Error: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0'
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: '^Error: .*$' found in stderr: 'Error: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0'
----------rerun:(48/6000)*----------