The hs_err file shows the following :

/jtreg_hotspot_tier1_work/JTwork/gc/shenandoah/oom/TestThreadFailure/hs_err_pid32954.log
Sat Dec 31 08:30:17 CET 2022

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/darwinaarch64/jdk/src/hotspot/share/oops/compressedOops.inline.hpp:135), pid=32954, tid=23811
# assert(check_alignment(result)) failed: address not aligned: 0x00000008baadbabe
#
# JRE version: OpenJDK Runtime Environment (21.0) (fastdebug build 21-internal-adhoc.openjdk.jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 21-internal-adhoc.openjdk.jdk, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, shenandoah gc, bsd-aarch64)
# Core dump will be written. Default location: /cores/core.32954
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

--------------- S U M M A R Y ------------

Command Line: -Xmx32m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC TestThreadFailure test

Host: xyz, "Macmini" arm64, 8 cores, 16G, Darwin 21.5.0, macOS 12.4 (21F79)
Time: Sat Dec 31 08:30:15 2022 CET elapsed time: 18.860825 seconds (0d 0h 0m 18s)

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

Current thread (0x0000000100906d00): WorkerThread "Shenandoah GC Threads#1" [stack: 0x0000000171ac8000,0x0000000171ccb000] [id=23811]

Stack: [0x0000000171ac8000,0x0000000171ccb000], sp=0x0000000171cca860, free space=2058k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.dylib+0x117ba38] VMError::report_and_die(int, char const*, char const*, char*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x4bc (compressedOops.inline.hpp:135)
V [libjvm.dylib+0x117c308] VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, char*)+0x40
V [libjvm.dylib+0x576990] report_vm_error(char const*, int, char const*, char const*, ...)+0x80
V [libjvm.dylib+0xede580] ShenandoahAsserts::assert_correct(void*, oop, char const*, int)+0x1b8
V [libjvm.dylib+0xedf2ec] ShenandoahAsserts::assert_not_forwarded(void*, oop, char const*, int)+0x5c
V [libjvm.dylib+0xf558b8] void ShenandoahMark::mark_through_ref<narrowOop>(narrowOop*, Padded<BufferedOverflowTaskQueue<ShenandoahMarkTask, (MEMFLAGS)5, 131072u>, 64ul>*, ShenandoahMarkingContext*, bool)+0x70
V [libjvm.dylib+0xf5d4f0] void OopOopIterateDispatch<ShenandoahMarkRefsClosure>::Table::oop_oop_iterate<InstanceKlass, narrowOop>(ShenandoahMarkRefsClosure*, oop, Klass*)+0x128
V [libjvm.dylib+0xf58440] void oopDesc::oop_iterate<ShenandoahMarkRefsClosure>(ShenandoahMarkRefsClosure*)+0x100
V [libjvm.dylib+0xf58074] void ShenandoahMark::do_task<ShenandoahMarkRefsClosure, (StringDedupMode)0>(Padded<BufferedOverflowTaskQueue<ShenandoahMarkTask, (MEMFLAGS)5, 131072u>, 64ul>*, ShenandoahMarkRefsClosure*, unsigned short*, StringDedup::Requests*, ShenandoahMarkTask*)+0x35c
V [libjvm.dylib+0xf54ff0] void ShenandoahMark::mark_loop_work<ShenandoahMarkRefsClosure, true, (StringDedupMode)0>(ShenandoahMarkRefsClosure*, unsigned short*, unsigned int, TaskTerminator*, StringDedup::Requests*)+0x5e0
V [libjvm.dylib+0xf5354c] void ShenandoahMark::mark_loop_prework<true, (StringDedupMode)0>(unsigned int, TaskTerminator*, ShenandoahReferenceProcessor*, StringDedup::Requests*)+0x1e0
V [libjvm.dylib+0xf05ac4] ShenandoahConcurrentMarkingTask::work(unsigned int)+0x188
V [libjvm.dylib+0x11d7a44] WorkerThread::run()+0x94
V [libjvm.dylib+0x10d22c8] Thread::call_run()+0x220
V [libjvm.dylib+0xdc0a54] thread_native_entry(Thread*)+0x160
C [libsystem_pthread.dylib+0x726c] _pthread_start+0x94