Test compiler/jvmci/TestEnableJVMCIProduct.java intermittently crashes with 
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (t:/workspace/open/src/hotspot/share/jvmci/jvmciRuntime.cpp:1102), pid=27204, tid=55816
#  fatal error: Fatal exception in JVMCI: Exception during JVMCI compiler initialization
#
# JRE version: Java(TM) SE Runtime Environment (16.0+25) (fastdebug build 16-ea+25-1633)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 16-ea+25-1633, mixed mode, sharing, tiered, jvmci, jvmci compiler, compressed oops, g1 gc, windows-amd64)
# Core dump will be written. Default location: T:\testoutput\test-support\jtreg_open_test_hotspot_jtreg_tier1\scratch\7\hs_err_pid27204.mdmp
#
# 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: -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCIProduct -XX:-UnlockExperimentalVMOptions -XX:+EnableJVMCI -XX:+PrintFlagsFinal 

Host: Intel(R) Xeon(R) Platinum 8167M CPU @ 2.00GHz, 32 cores, 239G,  Windows Server 2016 , 64 bit Build 14393 (10.0.14393.2969)
Time: Tue Nov 24 15:41:32 2020 Etc elapsed time: 0.923634 seconds (0d 0h 0m 0s)

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

Current thread (0x00000240e1ae5630):  JavaThread "JVMCI CompilerThread0" daemon [_thread_in_vm, id=55816, stack(0x000000f152100000,0x000000f152200000)]


Current CompileTask:
JVMCI:    923  155       4       java.lang.String::hashCode (60 bytes)

Stack: [0x000000f152100000,0x000000f152200000]
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [jvm.dll+0xae66e1]  os::platform_print_native_stack+0xf1  (os_windows_x86.cpp:236)
V  [jvm.dll+0xd0d237]  VMError::report+0xfb7  (vmError.cpp:731)
V  [jvm.dll+0xd0eb5e]  VMError::report_and_die+0x7de  (vmError.cpp:1537)
V  [jvm.dll+0xd0f274]  VMError::report_and_die+0x64  (vmError.cpp:1328)
V  [jvm.dll+0x4ba27d]  report_fatal+0x9d  (debug.cpp:287)
V  [jvm.dll+0x86c021]  JVMCIRuntime::compile_method+0x3f1  (jvmciRuntime.cpp:1513)
V  [jvm.dll+0x48a82e]  CompileBroker::invoke_compiler_on_method+0x5be  (compileBroker.cpp:2264)
V  [jvm.dll+0x488538]  CompileBroker::compiler_thread_loop+0x458  (compileBroker.cpp:1993)
V  [jvm.dll+0xc9b0c7]  JavaThread::run+0x327  (thread.cpp:1780)
V  [jvm.dll+0xc92294]  Thread::call_run+0x1b4  (thread.cpp:399)
V  [jvm.dll+0xae4ebe]  thread_native_entry+0x10e  (os_windows.cpp:561)
C  [ucrtbase.dll+0x1f4a0]
C  [KERNEL32.DLL+0x84d4]
C  [ntdll.dll+0x6e851]


---------------  P R O C E S S  ---------------

Threads class SMR info:
_java_thread_list=0x00000240e29805c0, length=15, elements={
0x00000240e1abae10, 0x00000240e1abe340, 0x00000240e1adb150, 0x00000240e1ac29a0,
0x00000240e1ac4f90, 0x00000240e1ae2120, 0x00000240e1ae5630, 0x00000240e1ae6c40,
0x00000240e1aece30, 0x00000240e1c18dd0, 0x00000240e2832a70, 0x00000240e28f7070,
0x00000240e28f96d0, 0x00000240e28f7a90, 0x00000240e29cb0a0
}
_java_thread_list_alloc_cnt=20, _java_thread_list_free_cnt=18, _java_thread_list_max=16, _nested_thread_list_max=0
_tlh_cnt=37, _tlh_times=0, avg_tlh_time=0.00, _tlh_time_max=0
_deleted_thread_cnt=1, _deleted_thread_times=0, avg_deleted_thread_time=0.00, _deleted_thread_time_max=0
_delete_lock_wait_cnt=0, _delete_lock_wait_max=0
_to_delete_list_cnt=0, _to_delete_list_max=1

Java Threads: ( => current thread )
  0x00000240e1abae10 JavaThread "Reference Handler" daemon [_thread_blocked, id=28640, stack(0x000000f151b00000,0x000000f151c00000)]
  0x00000240e1abe340 JavaThread "Finalizer" daemon [_thread_blocked, id=43344, stack(0x000000f151c00000,0x000000f151d00000)]
  0x00000240e1adb150 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=28736, stack(0x000000f151d00000,0x000000f151e00000)]
  0x00000240e1ac29a0 JavaThread "Attach Listener" daemon [_thread_blocked, id=61772, stack(0x000000f151e00000,0x000000f151f00000)]
  0x00000240e1ac4f90 JavaThread "Service Thread" daemon [_thread_blocked, id=52564, stack(0x000000f151f00000,0x000000f152000000)]
  0x00000240e1ae2120 JavaThread "Monitor Deflation Thread" daemon [_thread_blocked, id=45856, stack(0x000000f152000000,0x000000f152100000)]
=>0x00000240e1ae5630 JavaThread "JVMCI CompilerThread0" daemon [_thread_in_vm, id=55816, stack(0x000000f152100000,0x000000f152200000)]
  0x00000240e1ae6c40 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id=29044, stack(0x000000f152200000,0x000000f152300000)]
  0x00000240e1aece30 JavaThread "Sweeper thread" daemon [_thread_blocked, id=17112, stack(0x000000f152300000,0x000000f152400000)]
  0x00000240e1c18dd0 JavaThread "Common-Cleaner" daemon [_thread_blocked, id=19812, stack(0x000000f152400000,0x000000f152500000)]
  0x00000240e2832a70 JavaThread "C1 CompilerThread1" daemon [_thread_blocked, id=9000, stack(0x000000f152500000,0x000000f152600000)]
  0x00000240e28f7070 JavaThread "C1 CompilerThread2" daemon [_thread_blocked, id=25284, stack(0x000000f152600000,0x000000f152700000)]
  0x00000240e28f96d0 JavaThread "C1 CompilerThread3" daemon [_thread_blocked, id=50104, stack(0x000000f152700000,0x000000f152800000)]
  0x00000240e28f7a90 JavaThread "C1 CompilerThread4" daemon [_thread_blocked, id=60560, stack(0x000000f152800000,0x000000f152900000)]
  0x00000240e29cb0a0 JavaThread "Notification Thread" daemon [_thread_blocked, id=63712, stack(0x000000f152900000,0x000000f152a00000)]

Other Threads:
  0x00000240e1ab8ba0 VMThread "VM Thread" [stack: 0x000000f151a00000,0x000000f151b00000] [id=44000] _threads_hazard_ptr=0x00000240e29805c0, _nested_threads_hazard_ptr_cnt=0
  0x00000240f2a71040 GCTaskThread "GC Thread#0" [stack: 0x000000f151500000,0x000000f151600000] [id=38396]
  0x00000240f2a81300 ConcurrentGCThread "G1 Main Marker" terminated
  0x00000240f2a84ed0 ConcurrentGCThread "G1 Conc#0" [stack: 0x000000f151700000,0x000000f151800000] [id=14396]
  0x00000240fb5ee050 ConcurrentGCThread "G1 Refine#0" terminated
  0x00000240e18a4040 ConcurrentGCThread "G1 Service" terminated

Threads with active compile tasks:
JVMCI CompilerThread0     1167  155       4       java.lang.String::hashCode (60 bytes)

VM state: synchronizing (normal execution)

VM Mutex/Monitor currently owned by a thread:  ([mutex/lock_event])
[0x00000240f2a1bc90] Threads_lock - owner thread: 0x00000240e1ab8ba0
[0x00000240f2a1d8e0] Heap_lock - owner thread: 0x00000240f2a269a0

Heap address: 0x0000000082000000, size: 30688 MB, Compressed Oops mode: Zero based, Oop shift amount: 3
CDS archive(s) mapped at: [0x0000000800000000-0x0000000800c10000-0x0000000800c10000), size 12648448, SharedBaseAddress: 0x0000000800000000, ArchiveRelocationMode: 0.
Compressed class space mapped at: 0x0000000801000000-0x0000000841000000, reserved size: 1073741824
Narrow klass base: 0x0000000800000000, Narrow klass shift: 3, Narrow klass range: 0x100000000

GC Precious Log:
 CPUs: 32 total, 32 available
 Memory: 239G
 Large Page Support: Disabled
 NUMA Support: Disabled
 Compressed Oops: Enabled (Zero based)
 Heap Region Size: 16M
 Heap Min Capacity: 16M
 Heap Initial Capacity: 2G
 Heap Max Capacity: 30688M
 Pre-touch: Disabled
 Parallel Workers: 23
 Concurrent Workers: 6
 Concurrent Refinement Workers: 23
 Periodic GC: Disabled

Heap:
 garbage-first heap   total 2097152K, used 0K [0x0000000082000000, 0x0000000800000000)
  region size 16384K, 1 young (16384K), 0 survivors (0K)
 Metaspace       used 1419K, committed 1664K, reserved 1056768K
  class space    used 132K, committed 256K, reserved 1048576K