The following test failed in the JDK21 CI:

resourcehogs/serviceability/sa/ClhsdbRegionDetailsScanOopsForG1.java

Here's a snippet from the log file:

Region: 0x00000007ffa00000,0x00000007ffc00000,0x00000007ffc00000:Old
Region: 0x00000007ffc00000,0x00000007ffe00000,0x00000007ffe00000:Old
Region: 0x00000007ffe00000,0x00000007fff023f8,0x0000000800000000:Old
hsdb> + quit

STDOUT: Executable=/System/Volumes/Data/mesos/work_dir/jib-master/install/jdk-21+26-2328/macosx-x64-debug.jdk/jdk-21/fastdebug/bin/java
STDOUT: Identifier=com.oracle.java.java
STDOUT: Format=Mach-O thin (x86_64)
STDOUT: CodeDirectory v=20400 size=621 flags=0x2(adhoc) hashes=9+7 location=embedded
Target JDK is adhoc signed, but not hardened.
STDOUT: Signature=adhoc
STDOUT: Info.plist entries=5
STDOUT: TeamIdentifier=not set
STDOUT: Sealed Resources=none
STDOUT: Internal requirements count=0 size=12
Starting clhsdb against 52604
Adding 'sudo -E -n' to the command.
[2023-06-10T12:09:46.095023Z] Gathering output for process 52613
[2023-06-10T12:10:09.998014Z] Waiting for completion for process 52613
[2023-06-10T12:10:09.998069Z] Waiting for completion finished for process 52613
Output:
Attaching to process 52604, please wait...
hsdb> hsdb> + verbose true
hsdb> + scanoops 0x000000060fe00000 0x0000000610000000
0x000000060fe00000 [Ljava/lang/String;
hsdb> + quit

 LingeredApp stdout: [#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/System/Volumes/Data/mesos/work_dir/slaves/741e9afd-8c02-45c3-b2e2-9db1450d0832-S176103/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/4214e807-0172-4d6c-8f9f-f9c08bb7ac6b/runs/ea0ea94c-aca4-4eed-943b-c9febdfe838a/workspace/open/src/hotspot/share/oops/compressedOops.inline.hpp:58), pid=52604, tid=24067
# assert(Universe::is_in_heap(result)) failed: object not in heap 0x0000000000000010
#
# JRE version: Java(TM) SE Runtime Environment (21.0+26) (fastdebug build 21-ea+26-LTS-2328)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 21-ea+26-LTS-2328, compiled mode, sharing, compressed oops, compressed class ptrs, g1 gc, bsd-amd64)
# Core dump will be written. Default location: core.52604
#
# An error report file with more information is saved as:
# /System/Volumes/Data/mesos/work_dir/slaves/741e9afd-8c02-45c3-b2e2-9db1450d0832-S177403/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9276d790-a0db-4def-8d4f-5ed412b65d1c/runs/bb070c8e-fe3e-4932-a507-7207b526877a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_misc/scratch/0/hs_err_pid52604.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
];
 LingeredApp stderr: []
 LingeredApp exitValue = 134
----------System.err:(13/849)----------
java.io.IOException: LingeredApp terminated with non-zero exit code 134
at jdk.test.lib.apps.LingeredApp.stopApp(LingeredApp.java:427)
at jdk.test.lib.apps.LingeredApp.stopApp(LingeredApp.java:515)
at ClhsdbRegionDetailsScanOopsForG1.main(ClhsdbRegionDetailsScanOopsForG1.java:88)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1583)

JavaTest Message: Test threw exception: java.io.IOException: LingeredApp terminated with non-zero exit code 134
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.io.IOException: LingeredApp terminated with non-zero exit code 134
----------rerun:(43/9263)*----------


Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x00007ff2d0b70b80): WorkerThread "GC Thread#3" [id=24067, stack(0x0000700009068000,0x0000700009168000) (1024K)]

Stack: [0x0000700009068000,0x0000700009168000], sp=0x0000700009167880, free space=1022k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.dylib+0x14d5819] VMError::report_and_die(int, char const*, char const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x739 (compressedOops.inline.hpp:58)
V [libjvm.dylib+0x14d5f1b] VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, __va_list_tag*)+0x3b
V [libjvm.dylib+0x7db3d5] report_vm_error(char const*, int, char const*, char const*, ...)+0xc5
V [libjvm.dylib+0x3a21b8] CompressedOops::decode_not_null(narrowOop)+0x1c8
V [libjvm.dylib+0xa8a6c8] void G1VerifyLiveAndRemSetClosure::do_oop_work<narrowOop>(narrowOop*)+0x198
V [libjvm.dylib+0xa8fa7b] void ObjArrayKlass::oop_oop_iterate<narrowOop, G1VerifyLiveAndRemSetClosure>(oop, G1VerifyLiveAndRemSetClosure*)+0x25b
V [libjvm.dylib+0xa8f791] void OopOopIterateDispatch<G1VerifyLiveAndRemSetClosure>::Table::oop_oop_iterate<ObjArrayKlass, narrowOop>(G1VerifyLiveAndRemSetClosure*, oop, Klass*)+0x51
V [libjvm.dylib+0xa881b4] void oopDesc::oop_iterate<G1VerifyLiveAndRemSetClosure>(G1VerifyLiveAndRemSetClosure*)+0x144
V [libjvm.dylib+0xa87f23] HeapRegion::verify_liveness_and_remset(VerifyOption) const+0x473
V [libjvm.dylib+0xa882c3] HeapRegion::verify(VerifyOption) const+0xd3
V [libjvm.dylib+0x9b11a5] VerifyRegionClosure::do_heap_region(HeapRegion*)+0x245
V [libjvm.dylib+0xa92d43] HeapRegionManager::par_iterate(HeapRegionClosure*, HeapRegionClaimer*, unsigned int) const+0x173
V [libjvm.dylib+0x9b0f48] G1VerifyTask::work(unsigned int)+0x38
V [libjvm.dylib+0x154636c] WorkerThread::run()+0x7c
V [libjvm.dylib+0x13ff39f] Thread::call_run()+0x17f
V [libjvm.dylib+0x112fbff] thread_native_entry(Thread*)+0x14f
C [libsystem_pthread.dylib+0x6109] _pthread_start+0x94
C [libsystem_pthread.dylib+0x1b8b] thread_start+0xf