Using inline types in a prototype implementation of HashMap produces this error.

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (open/src/hotspot/share/gc/g1/g1SATBMarkQueueSet.cpp:87), pid=21263, tid=21264
# assert(region != __null) failed: No region for 0x00000005d56dd5f0
#
# JRE version: Java(TM) SE Runtime Environment (14.0) (fastdebug build 14-lworldea+0-2019-10-26-1616424.rriggs.valhalla-dev)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 14-lworldea+0-2019-10-26-1616424.rriggs.valhalla-dev, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0xd05a07] G1SATBMarkQueueSet::filter(SATBMarkQueue*)+0xaf7
#

hs_error attached.

The error is reproducible with prototype patches (available on request) for using inline types
and running the test: open/test/jdk/java/util/Map/Defaults.java