Split out from JDK-8241804:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f6d99622a34, pid=3789, tid=3792
#
# JRE version: Java(TM) SE Runtime Environment (15.0+27) (fastdebug build 15-ea+27-1314)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 15-ea+27-1314, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0xb64a34] G1ParScanThreadState::copy_to_survivor_space(G1HeapRegionAttr, oop, markWord)+0x314
#

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

Current thread (0x00007f6d94071500): GCTaskThread "GC Thread#0" [stack: 0x00007f6d69d1a000,0x00007f6d69e1a000] [id=3792]

Stack: [0x00007f6d69d1a000,0x00007f6d69e1a000], sp=0x00007f6d69e188e0, free space=1018k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xb64a34] G1ParScanThreadState::copy_to_survivor_space(G1HeapRegionAttr, oop, markWord)+0x314
V [libjvm.so+0xb9842f] void G1ParCopyClosure<(G1Barrier)1, (G1Mark)0>::do_oop_work<oop>(oop*)+0xef
V [libjvm.so+0x894863] ClassLoaderData::ChunkedHandleList::oops_do(OopClosure*)+0x93
V [libjvm.so+0xb5f6a3] G1CLDScanClosure::do_cld(ClassLoaderData*)+0x33
V [libjvm.so+0x89e6fa] ClassLoaderDataGraph::roots_cld_do(CLDClosure*, CLDClosure*)+0x4a
V [libjvm.so+0xb9a85e] G1RootProcessor::process_java_roots(G1RootClosures*, G1GCPhaseTimes*, unsigned int)+0xce
V [libjvm.so+0xb9ae84] G1RootProcessor::evacuate_roots(G1ParScanThreadState*, unsigned int)+0x64
V [libjvm.so+0xae3cf2] G1EvacuateRegionsTask::scan_roots(G1ParScanThreadState*, unsigned int)+0x22
V [libjvm.so+0xae489a] G1EvacuateRegionsBaseTask::work(unsigned int)+0x8a
V [libjvm.so+0x1800a14] GangWorker::run_task(WorkData)+0x84
V [libjvm.so+0x1800b3e] GangWorker::loop()+0x2e
V [libjvm.so+0x16c3240] Thread::call_run()+0x100
V [libjvm.so+0x13c6346] thread_native_entry(Thread*)+0x116