The following test failed in the JDK15 CI:

sun/tools/jhsdb/HeapDumpTestWithActiveProcess.java

Here's a snippet from the log file:

----------System.out:(40/2378)----------
Starting Jshell
[JShell]:/opt/mach5/mesos/work_dir/jib-master/install/jdk-15+22-1011/linux-x64-debug.jdk/jdk-15/fastdebug/bin/jshell
[JShell] | Welcome to JShell -- Version 15-ea
[JShell] | For an introduction type: /help intro
Jshell Started in 3432ms
Starting jmap against 12029
[2020-05-04T21:40:21.671711Z] Gathering output for process 12098
[2020-05-04T21:40:35.291144Z] Waiting for completion for process 12098
[2020-05-04T21:40:35.291378Z] Waiting for completion finished for process 12098
Output and diagnostic info for process 12098 was saved into 'pid-12098-output.log'
jhsdb jmap stdout:
Attaching to process ID 12029, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 15-ea+22-1011

jhsdb jmap stderr:
sun.jvm.hotspot.utilities.AssertionFailure: illegal bci(-1368758984) codeSize(66)
at jdk.hotspot.agent/sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
at jdk.hotspot.agent/sun.jvm.hotspot.oops.ConstMethod.getLineNumberFromBCI(ConstMethod.java:310)
at jdk.hotspot.agent/sun.jvm.hotspot.oops.Method.getLineNumberFromBCI(Method.java:282)
at jdk.hotspot.agent/sun.jvm.hotspot.utilities.HeapHprofBinWriter.dumpStackFrame(HeapHprofBinWriter.java:751)
at jdk.hotspot.agent/sun.jvm.hotspot.utilities.HeapHprofBinWriter.dumpStackTraces(HeapHprofBinWriter.java:730)
at jdk.hotspot.agent/sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:439)
at jdk.hotspot.agent/sun.jvm.hotspot.tools.JMap.writeHeapHprofBin(JMap.java:182)
at jdk.hotspot.agent/sun.jvm.hotspot.tools.JMap.run(JMap.java:97)
at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:262)
at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.start(Tool.java:225)
at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
at jdk.hotspot.agent/sun.jvm.hotspot.tools.JMap.main(JMap.java:176)
at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runJMAP(SALauncher.java:331)
at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:483)

###### End of all output:
[2020-05-04T21:40:35.315070Z] Waiting for completion for process 12098
[2020-05-04T21:40:35.315242Z] Waiting for completion finished for process 12098
[2020-05-04T21:40:35.315431Z] Waiting for completion for process 12098
[2020-05-04T21:40:35.315548Z] Waiting for completion finished for process 12098
Destroying jshell
Jshell destroyed
----------System.err:(46/2815)----------