Test hotspot/test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java will trigger jvm crash on huge core number machine， or you can change the test to replay the bug:

diff --git a/hotspot/test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java b/hotspot/test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java
index e653554c94e..f27e70dae7c 100644
--- a/hotspot/test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java
+++ b/hotspot/test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java
@@ -51,6 +51,7 @@ public class TestG1TraceEagerReclaimHumongousObjects {
                                                "-XX:+UnlockExperimentalVMOptions",
                                                "-XX:G1LogLevel=finest",
                                                "-XX:+G1TraceEagerReclaimHumongousObjects",
+ "-XX:ActiveProcessorCount=500",
                                                GCTest.class.getName());
 
     OutputAnalyzer output = new OutputAnalyzer(pb.start());
@@ -75,6 +76,7 @@ public class TestG1TraceEagerReclaimHumongousObjects {
                                                "-XX:+UnlockExperimentalVMOptions",
                                                "-XX:G1LogLevel=finest",
                                                "-XX:+G1TraceEagerReclaimHumongousObjects",
+ "-XX:ActiveProcessorCount=500",
                                                GCWithHumongousObjectTest.class.getName());
 
     OutputAnalyzer output = new OutputAnalyzer(pb.start());

Below is the test log snippet:

# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f4370c5d481, pid=1413462, tid=0x00007f3e22aa2640
#
# JRE version: OpenJDK Runtime Environment (8.0_412) (build 1.8.0_412-internal-_2025_07_10_16_25-b00)
# Java VM: OpenJDK 64-Bit Server VM (25.412-b00 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [libc.so.6+0x88481]
#
# Core dump written. Default location: /home/yansendao/gerrit/hygon-jdk-8/tmp/scratch/core or core.1413462
#
# An error report file with more information is saved as:
# /home/yansendao/gerrit/hygon-jdk-8/tmp/scratch/hs_err_pid1413462.log
#
# If you would like to submit a bug report, please visit:
# mailto:yansendao@hygon.cn
#
];
 stderr: []
 exitValue = 134

java.lang.RuntimeException: Expected to get exit value of [0]

        at com.oracle.java.testlibrary.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:377)
        at TestG1TraceEagerReclaimHumongousObjects.testHumongousObjectGCLogs(TestG1TraceEagerReclaimHumongousObjects.java:92)
        at TestG1TraceEagerReclaimHumongousObjects.main(TestG1TraceEagerReclaimHumongousObjects.java:40)