The following test failed an assert in the JDK25 CI:

runtime/cds/appcds/javaldr/GCSharedStringsDuringDump.java

Here's a snippet from the log file:

[2025-06-06T19:12:37.129318993Z] Waiting for completion for process 1756856
[2025-06-06T19:12:37.129434994Z] Waiting for completion finished for process 1756856
Command line: [/opt/mach5/mesos/work_dir/jib-master/install/jdk-25+26-3357/linux-aarch64-debug.jdk/jdk-25/fastdebug/bin/java -cp /opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/classes/1/runtime/cds/appcds/javaldr/GCSharedStringsDuringDump.d:/opt/mach5/mesos/work_dir/jib-master/install/jdk-25+26-3357/src.full/open/test/hotspot/jtreg/runtime/cds/appcds/javaldr:/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/classes/1/test/lib:/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/classes/1/test/hotspot/jtreg/runtime/cds/appcds:/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/classes/1/test/hotspot/jtreg/runtime/cds/appcds/test-classes:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.5.1/1/bundles/jtreg-7.5.1+1.zip/jtreg/lib/jtreg.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.5.1/1/bundles/jtreg-7.5.1+1.zip/jtreg/lib/junit-platform-console-standalone-1.11.0.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.5.1/1/bundles/jtreg-7.5.1+1.zip/jtreg/lib/testng-7.3.0.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.5.1/1/bundles/jtreg-7.5.1+1.zip/jtreg/lib/jcommander-1.82.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.5.1/1/bundles/jtreg-7.5.1+1.zip/jtreg/lib/guice-5.1.0.jar -XX:MaxRAMPercentage=6.25 -Dtest.boot.jdk=/opt/mach5/mesos/work_dir/jib-master/install/jdk/24/36/bundles/linux-aarch64/jdk-24_linux-aarch64_bin.tar.gz/jdk-24 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/tmp -Xcomp -ea -esa -XX:CompileThreshold=100 -XX:+UnlockExperimentalVMOptions -server -XX:+TieredCompilation -XX:+DeoptimizeALot -cp /opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/GCSharedStringsDuringDumpApp.jar -Xshare:dump -Xlog:cds -XX:SharedArchiveFile=/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/appcds-19h12m37s133.jsa -XX:ExtraSharedClassListFile=/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/runtime.cds.appcds.javaldr.GCSharedStringsDuringDump.java-test.classlist -Xbootclasspath/a:/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/WhiteBox.jar -javaagent:/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/GCDuringDumpTransformer.jar -Xmx32m -showversion -XX:SharedArchiveConfigFile=/opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/GCSharedStringDuringDump_gen.txt -XX:+UnlockDiagnosticVMOptions -XX:+AllowArchivingWithJavaAgent ]
[2025-06-06T19:12:37.135534273Z] Gathering output for process 1756995
[ELAPSED: 7015 ms]
[logging stdout to /opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/runtime.cds.appcds.javaldr.GCSharedStringsDuringDump.java-0003-dump.stdout]
[logging stderr to /opt/mach5/mesos/work_dir/slaves/d2398cde-9325-49c3-b030-8961a4f0a253-S138349/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2a407ca9-2d89-46c2-b5b2-9a37934ca57e/runs/461bfd11-69e7-4dfb-80aa-5b7b2cc6918a/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_tier2_runtime/scratch/3/runtime.cds.appcds.javaldr.GCSharedStringsDuringDump.java-0003-dump.stderr]
[STDERR]

[2025-06-06T19:12:44.151353871Z] Waiting for completion for process 1756995
[2025-06-06T19:12:44.151507912Z] Waiting for completion finished for process 1756995
----------System.err:(15/824)----------
java.lang.RuntimeException: Hotspot crashed
at jdk.test.lib.cds.CDSTestUtils.executeAndLog(CDSTestUtils.java:703)
at jdk.test.lib.cds.CDSTestUtils.executeAndLog(CDSTestUtils.java:679)
at TestCommon.createArchive(TestCommon.java:308)
at TestCommon.createArchive(TestCommon.java:177)
at TestCommon.dump(TestCommon.java:134)
at GCSharedStringsDuringDump.main(GCSharedStringsDuringDump.java:95)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:335)
at java.base/java.lang.Thread.run(Thread.java:1474)

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

result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Hotspot crashed


The crashing thread's stack is:

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

Current thread (0x0000ffffa812c970): VMThread "VM Thread" [id=1757005, stack(0x0000ffffac4c0000,0x0000ffffac6be000) (2040K)]

Stack: [0x0000ffffac4c0000,0x0000ffffac6be000], sp=0x0000ffffac6bbd10, free space=2031k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x16b4b54] StringTable::init_shared_strings_array()::{lambda(WeakHandle*)#1}::operator()(WeakHandle*) const [clone .isra.0]+0x394 (stringTable.cpp:1058)
V [libjvm.so+0x16b835c] StringTable::init_shared_strings_array()+0x13c (concurrentHashTable.inline.hpp:960)
V [libjvm.so+0xd7d508] HeapShared::archive_strings()+0x28 (heapShared.cpp:610)
V [libjvm.so+0xd7d614] HeapShared::end_scanning_for_oops()+0x14 (heapShared.cpp:673)
V [libjvm.so+0x59922c] AOTArtifactFinder::find_artifacts()+0xa48 (aotArtifactFinder.cpp:184)
V [libjvm.so+0x5cc46c] ArchiveBuilder::gather_klasses_and_symbols()+0x80 (archiveBuilder.cpp:273)
V [libjvm.so+0x5cc81c] ArchiveBuilder::gather_source_objs()+0x9c (archiveBuilder.cpp:533)
V [libjvm.so+0x13a1698] VM_PopulateDumpSharedSpace::doit()+0x118 (metaspaceShared.cpp:657)
V [libjvm.so+0x18b6d30] VM_Operation::evaluate()+0x148 (vmOperations.cpp:74)
V [libjvm.so+0x18d8d60] VMThread::evaluate_operation(VM_Operation*)+0x120 (vmThread.cpp:282)
V [libjvm.so+0x18d9b7c] VMThread::inner_execute(VM_Operation*)+0x3ec (vmThread.cpp:426)
V [libjvm.so+0x18d9de8] VMThread::loop()+0x88 (vmThread.cpp:492)
V [libjvm.so+0x18d9f24] VMThread::run()+0xa4 (vmThread.cpp:176)
V [libjvm.so+0x17c31ac] Thread::call_run()+0xac (thread.cpp:243)
V [libjvm.so+0x14b769c] thread_native_entry(Thread*)+0x12c (os_linux.cpp:868)
C [libc.so.6+0x80188] start_thread+0x2d8