G1 crash in AccessInternal::PostRuntimeDispatch

Test:

java/lang/ClassLoader/forNameLeak/ClassForNameLeak.java

#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ff87544ac2a, pid=5556, tid=18440
#
# JRE version: Java(TM) SE Runtime Environment (13.0) (fastdebug build 13-internal+0-jdk13-jdk.303)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 13-internal+0-jdk13-jdk.303, compiled mode, sharing, tiered, compressed oops, g1 gc, windows-amd64)
# Problematic frame:
# V [jvm.dll+0x2eac2a] AccessInternal::PostRuntimeDispatch<G1BarrierSet::AccessBarrier<663668,G1BarrierSet>,2,663668>::oop_access_barrier+0xa
#
# Core dump will be written. Default location: T:\\testOutput\\test-support\\jtreg_open_test_jdk_jdk_lang\\scratch\\0\\hs_err_pid5556.mdmp
#
# An error report file with more information is saved as:
# T:\\testOutput\\test-support\\jtreg_open_test_jdk_jdk_lang\\scratch\\0\\hs_err_pid5556.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp