The following test failed in the JDK24 CI:

gc/g1/TestHumongousCodeCacheRoots.java

Here's a snippet from the log file:

#section:driver
----------messages:(8/349)----------
command: driver gc.g1.TestHumongousCodeCacheRoots
reason: User specified action: run driver gc.g1.TestHumongousCodeCacheRoots
started: Thu Jul 25 07:04:10 UTC 2024
Mode: agentvm
Agent id: 8
Additional exports to unnamed modules from @modules: java.base/jdk.internal.misc
finished: Thu Jul 25 07:04:20 UTC 2024
elapsed time (seconds): 9.638
----------configuration:(15/1425)*----------

<snip>

----------System.err:(35/1868)*----------
 stdout: [
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (c:\\sb\\prod\\1721871764\\workspace\\open\\src\\hotspot\\share\\utilities/concurrentHashTable.inline.hpp:1184), pid=24820, tid=19184
# assert(stop_idx <= table->_size) failed: Must be
#
# JRE version: Java(TM) SE Runtime Environment (24.0+8) (fastdebug build 24-ea+8-853)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 24-ea+8-853, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, windows-amd64)
# Core dump will be written. Default location: C:\\sb\\prod\\1721890819\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_tier1_gc\\scratch\\2\\hs_err_pid24820.mdmp
#
Unsupported internal testing APIs have been used.

# An error report file with more information is saved as:
# C:\\sb\\prod\\1721890819\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_tier1_gc\\scratch\\2\\hs_err_pid24820.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
];
 stderr: []
 exitValue = 1

java.lang.RuntimeException: Expected to get exit value of [0], exit value is: [1]
at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:521)
at gc.g1.TestHumongousCodeCacheRoots.runWhiteBoxTest(TestHumongousCodeCacheRoots.java:110)
at gc.g1.TestHumongousCodeCacheRoots.main(TestHumongousCodeCacheRoots.java:122)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:588)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1575)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Expected to get exit value of [0], exit value is: [1]

Here's the crashing thread's stack:

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

Current thread (0x000002e282e521a0): WorkerThread "GC Thread#0" [id=19184, stack(0x000000fc00a00000,0x000000fc00b00000) (1024K)]

Stack: [0x000000fc00a00000,0x000000fc00b00000]
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [jvm.dll+0xc9e9b1] os::win32::platform_print_native_stack+0x101 (os_windows_x86.cpp:235)
V [jvm.dll+0xf60acb] VMError::report+0x149b (vmError.cpp:1011)
V [jvm.dll+0xf6316d] VMError::report_and_die+0x80d (vmError.cpp:1846)
V [jvm.dll+0xf63864] VMError::report_and_die+0x64 (vmError.cpp:1611)
V [jvm.dll+0x55ee9b] report_vm_error+0x5b (debug.cpp:193)
V [jvm.dll+0x67c50a] ConcurrentHashTable<G1CodeRootSetHashTableConfig,5>::ScanTask::do_safepoint_scan<`G1CodeRootSetHashTable::iterate_at_safepoint'::`2'::<lambda_1> >+0x22a (concurrentHashTableTasks.inline.hpp:283)
V [jvm.dll+0x67e21d] G1CodeRootSet::nmethods_do+0x5d (g1CodeRootSet.cpp:294)
V [jvm.dll+0x6d7df9] G1HeapRegion::verify+0x349 (g1HeapRegion.cpp:716)
V [jvm.dll+0x6e511a] VerifyRegionClosure::do_heap_region+0x15a (g1HeapVerifier.cpp:268)
V [jvm.dll+0x6db2b6] G1HeapRegionManager::par_iterate+0x106 (g1HeapRegionManager.cpp:600)
V [jvm.dll+0x6e6a97] G1VerifyTask::work+0x47 (g1HeapVerifier.cpp:310)
V [jvm.dll+0xfb4d47] WorkerThread::run+0x97 (workerThread.cpp:201)
V [jvm.dll+0xec2f97] Thread::call_run+0x1b7 (thread.cpp:230)
V [jvm.dll+0xc9d016] thread_native_entry+0xd6 (os_windows.cpp:553)
C [ucrtbase.dll+0x2268a] (no source info available)
C [KERNEL32.DLL+0x17ac4] (no source info available)
C [ntdll.dll+0x5a4e1] (no source info available)