The following test failed in the Valhalla CI:

runtime/cds/appcds/customLoader/ParallelTestMultiFP.java

Here's a snippet from the log file:

#section:driver
----------messages:(8/261)----------
command: driver ParallelTestMultiFP
reason: User specified action: run driver ParallelTestMultiFP
started: Thu Jan 29 08:57:39.325 UTC 2026
Mode: agentvm
Agent id: 30
Process id: 182869
finished: Thu Jan 29 08:58:06.116 UTC 2026
elapsed time (seconds): 26.791
----------configuration:(16/2545)----------

<snip>

----------System.err:(15/814)----------
java.lang.RuntimeException: Hotspot crashed
at jdk.test.lib.cds.CDSTestUtils.executeAndLog(CDSTestUtils.java:699)
at jdk.test.lib.cds.CDSTestUtils.executeAndLog(CDSTestUtils.java:675)
at TestCommon.runWithArchive(TestCommon.java:450)
at TestCommon.exec(TestCommon.java:484)
at ParallelTestBase.run(ParallelTestBase.java:93)
at ParallelTestMultiFP.main(ParallelTestMultiFP.java:37)
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:1516)

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


Here's snippet from the hs_err_pid file:

# Internal Error (/opt/mach5/mesos/work_dir/slaves/da1065b5-7b94-4f0d-85e9-a3a252b9a32e-S87569/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/3fc5ca8b-28ab-4138-9be5-2994961d1e8f/runs/6dc23086-4764-4ca8-b11f-a77c521b3cce/workspace/open/src/hotspot/share/c1/c1_Compilation.cpp:667), pid=188774, tid=188795
# assert(ik->exact_klass() == nullptr) failed: no cha for final klass
#
# JRE version: Java(TM) SE Runtime Environment (27.0+1) (fastdebug build 27-valhalla+1-73)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 27-valhalla+1-73, compiled mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x8c33ac] Compilation::cha_exact_type(ciType*)+0x1ac

<snip>

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

Current thread (0x00007f2e5817ff80): JavaThread "C1 CompilerThread0" daemon [_thread_in_native, id=188795, stack(0x00007f2e2e990000,0x00007f2e2ea90000) (1024K)]


Current CompileTask:
C1:18860 5214 b 3 ParallelLoadThread::testTransformation (123 bytes)

Stack: [0x00007f2e2e990000,0x00007f2e2ea90000], sp=0x00007f2e2ea8d7f0, free space=1013k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x8c33ac] Compilation::cha_exact_type(ciType*)+0x1ac (c1_Compilation.cpp:667)
V [libjvm.so+0x949aec] LIRGenerator::profile_type(ciMethodData*, int, int, long, Instruction*, LIR_Opr&, bool, ciKlass*, ciKlass*)+0x64c (c1_LIRGenerator.cpp:2817)
V [libjvm.so+0x94a47b] LIRGenerator::profile_element_type(Instruction*, ciMethodData*, ciArrayLoadData*)+0x7b (c1_LIRGenerator.cpp:2965)
V [libjvm.so+0x95a90e] LIRGenerator::do_LoadIndexed(LoadIndexed*)+0x4ce (c1_LIRGenerator.cpp:2346)
V [libjvm.so+0x93e032] LIRGenerator::do_root(Instruction*)+0x62 (c1_LIRGenerator.cpp:384)
V [libjvm.so+0x9442ee] non-virtual thunk to LIRGenerator::block_do(BlockBegin*)+0x5e (c1_LIRGenerator.hpp:511)
V [libjvm.so+0x906f41] BlockList::iterate_forward(BlockClosure*)+0x41 (c1_Instruction.cpp:1001)
V [libjvm.so+0x8c419b] Compilation::emit_lir()+0x5db (c1_Compilation.cpp:263)
V [libjvm.so+0x8c6c15] Compilation::compile_java_method()+0x275 (c1_Compilation.cpp:396)
V [libjvm.so+0x8c7556] Compilation::compile_method()+0x266 (c1_Compilation.cpp:471)
V [libjvm.so+0x8c7d02] Compilation::Compilation(AbstractCompiler*, ciEnv*, ciMethod*, int, BufferBlob*, bool, DirectiveSet*)+0x3d2 (c1_Compilation.cpp:606)
V [libjvm.so+0x8c9944] Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x224 (c1_Compiler.cpp:263)
V [libjvm.so+0xc2a640] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x780 (compileBroker.cpp:2345)
V [libjvm.so+0xc2bea0] CompileBroker::compiler_thread_loop()+0x530 (compileBroker.cpp:1989)
V [libjvm.so+0x11f0bcb] JavaThread::thread_main_inner()+0x13b (javaThread.cpp:777)
V [libjvm.so+0x1ce3006] Thread::call_run()+0xb6 (thread.cpp:242)
V [libjvm.so+0x18f7478] thread_native_entry(Thread*)+0x118 (os_linux.cpp:860)

Since this is an assertion failure in the "C1 CompilerThread0" thread, I'm starting
this bug off in hotspot/compiler.