When Intel APX is enabled, many JTreg tests related to Shenandoah GC (test/hotspot/jtreg/gc/shenandoah/) are failing with the following error messages.



------------------------------------------------------------ Error message 1 ---------------
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/home/parasa/forkJdk/jdk_demotion/src/hotspot/share/gc/shenandoah/shenandoahRuntime.cpp:44), pid=351419, tid=351487
# Error: Shenandoah assert_correct failed; oop must be in heap bounds
#
# JRE version: OpenJDK Runtime Environment (26.0) (fastdebug build 26-internal-adhoc.parasa.jdkdemotion)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 26-internal-adhoc.parasa.jdkdemotion, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, shenandoah gc, linux-amd64)


----------------------------------------------------------------- Error message 2 -----------------
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f31db1d5618, pid=1670439, tid=1672186
#
# JRE version: OpenJDK Runtime Environment (26.0) (fastdebug build 26-internal-adhoc.parasa.jdkdemotion)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 26-internal-adhoc.parasa.jdkdemotion, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, shenandoah gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x1b03618] ShenandoahSATBMarkQueueSet::filter(SATBMarkQueue&)+0x138
#