JFR: assert(klass != __null) failed: invariant in ObjectSampleCheckpoint::add_to_leakp_set

Stress test crashed with
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (open/src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp:123), pid=7787, tid=7943
# assert(klass != __null) failed: invariant
#
# JRE version: Java(TM) SE Runtime Environment (14.0) (fastdebug build 14-internal+0-2020-01-07-2124408.leonid.mesnik.jdk14)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 14-internal+0-2020-01-07-2124408.leonid.mesnik.jdk14, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x128f23c] ObjectSampleCheckpoint::add_to_leakp_set(Method const*, unsigned long)+0x34c
#
# Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/d65fa3d4-10de-46aa-a2db-52cc9981537a-S789/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9d52e96f-a2c4-4092-93b4-9412534447ec/runs/94952704-dc41-4005-ab99-243d348f6e9b/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/core.7787)
#
# 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: -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MaxRAMPercentage=6 -XX:MaxRAMPercentage=50 -XX:MaxMetaspaceSize=256m -XX:+HeapDumpOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError -Djava.net.preferIPv6Addresses=false -XX:+DisplayVMOutputToStderr -Xlog:gc*,gc+heap=debug:gc.log:uptime,timemillis,level,tags -XX:+DisableExplicitGC -XX:+StartAttachListener --add-exports=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-exports=java.xml/com.sun.org.apache.xerces.internal.parsers=ALL-UNNAMED --add-exports=java.xml/com.sun.org.apache.xerces.internal.util=ALL-UNNAMED -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/d65fa3d4-10de-46aa-a2db-52cc9981537a-S789/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9d52e96f-a2c4-4092-93b4-9412534447ec/runs/94952704-dc41-4005-ab99-243d348f6e9b/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/java.io.tmpdir -Duser.home=/opt/mach5/mesos/work_dir/slaves/d65fa3d4-10de-46aa-a2db-52cc9981537a-S789/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9d52e96f-a2c4-4092-93b4-9412534447ec/runs/94952704-dc41-4005-ab99-243d348f6e9b/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/user.home -agentpath:/opt/mach5/mesos/work_dir/jib-master/install/2020-01-07-2124408.leonid.mesnik.jdk14/linux-x64-debug.test/hotspot/jtreg/native/libJvmtiStressModule.so -Xverify:all -javaagent:redefineagent.jar -XX:NativeMemoryTracking=detail applications.kitchensink.process.stress.Main /opt/mach5/mesos/work_dir/slaves/d65fa3d4-10de-46aa-a2db-52cc9981537a-S789/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9d52e96f-a2c4-4092-93b4-9412534447ec/runs/94952704-dc41-4005-ab99-243d348f6e9b/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/kitchensink.final.properties

Host: ol7-build-test-5549, Intel(R) Xeon(R) Platinum 8167M CPU @ 2.00GHz, 8 cores, 58G, Oracle Linux Server release 7.7
Time: Tue Jan 7 22:26:34 2020 UTC elapsed time: 1749 seconds (0d 0h 29m 9s)

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

Current thread (0x00007fb92c0df800): JavaThread "JFR Recorder Thread" daemon [_thread_in_vm, id=7943, stack(0x00007fb886ced000,0x00007fb886dee000)]

Stack: [0x00007fb886ced000,0x00007fb886dee000], sp=0x00007fb886dec9d0, free space=1022k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x128f23c] ObjectSampleCheckpoint::add_to_leakp_set(Method const*, unsigned long)+0x34c
V [libjvm.so+0x128f40e] ObjectSampleCheckpoint::write_stacktrace(JfrStackTrace const*, JfrCheckpointWriter&)+0xfe
V [libjvm.so+0x1290098] StackTraceBlobInstaller::install(ObjectSample*)+0x1e8
V [libjvm.so+0x1290604] ObjectSampleCheckpoint::on_rotation(ObjectSampler const*, JfrStackTraceRepository&)+0xf4
V [libjvm.so+0xd352a4] JfrRecorderService::pre_safepoint_write()+0x114
V [libjvm.so+0xd357a2] JfrRecorderService::write()+0xd2
V [libjvm.so+0xd35a9f] JfrRecorderService::finalize_current_chunk()+0x3f
V [libjvm.so+0xd396d1] JfrRecorderService::rotate(int)+0x121
V [libjvm.so+0xd3b7ba] recorderthread_entry(JavaThread*, Thread*)+0x15a
V [libjvm.so+0x15a14a6] JavaThread::thread_main_inner()+0x226
V [libjvm.so+0x15a66d6] Thread::call_run()+0xf6
V [libjvm.so+0x12d5db6] thread_native_entry(Thread*)+0x116