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[ci-scan] Hang: JIT/jit64/regress/vsw/539509/test1_539509 never exits after Passed on browser-wasm R2R-CG2 #135042
Description
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1619748
Build error leg or test failing: run_test_p0_coreclr_R2R_CG2_browser_wasm_checked (R2R-CG2 browser wasm Checked no_tiered_compilation)-JIT/jit64/regress/vsw/539509/test1_539509/test1_539509.cmd
Pull request: #134618
KBE authoring guidance (ci-failure-scan)
Error Detailsis for readers. Paste the full exception, stack trace, or build error excerpt so the failure is understandable without opening the raw log.- Build Analysis parses only the single JSON block under
Error Message. ErrorPatternuses .NETSingleline | IgnoreCase | NonBacktrackingmatching with a 50ms-per-line timeout.- Keep the regex anchored, prefer
[^\n]*over.*, and avoid catastrophic backtracking. - Set
BuildRetrytotrueonly for a clear infrastructure retry case.ExcludeConsoleLogdisables Helix console-log scanning.
The test crossgens and runs under node with corerun.js. It handles every expected exception and prints Passed., but the node process never exits. The out-of-process wrapper kills it after the 1800 s timeout, so the test fails even though its body passed. Helix work item jit64_5, job 6ca59463-8af3-4f89-bf8b-e15def16552f.
The PR build that hit this doesn't change crossgen2, the JIT, the VM, or corerun; its diff is limited to the browser WebAssembly SDK pack targets, boot-config tasks, and the browser loader. The test didn't fail in the main runtime build 1619318.
Error Details
Running: node --experimental-wasm-exnref --stack-size=8192 /root/helix/work/correlation/corerun.js -c /root/helix/work/correlation -p System.Reflection.Metadata.MetadataUpdater.IsSupported=false -p System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization=true /root/helix/work/workitem/e/JIT/jit64/regress/vsw/539509/test1_539509/test1_539509.dll
Testing AA::Method1
Exception handled: System.InvalidCastException: Unable to cast object of type 'BB' to type 'AA`6[System.SByte,System.Byte,System.UInt32,System.UInt32,System.Int64,System.Boolean]'.
...
Testing BB::Method1
Exception handled: System.InvalidCastException: Unable to cast object of type 'AA`6[System.SByte,System.Byte,System.UInt32,System.UInt32,System.Int64,System.Boolean]' to type 'BB'.
at BB.Method1(UInt32[,][][]& param1, String[][]& param2, Char[,]& param3, AA`6 param4, AA`6& param5, Int32 param6)
at App.TestEntryPoint()
Passed.
Process 828 exceeded timeout of 1800 seconds. Killing...
../regress/vsw/539509/test1_539509/test1_539509.sh: line 488: 828 Killed "${cmd[@]}"
Kill watchdog with PID 829
Error Message
{
"ErrorMessage": "",
"ErrorPattern": "test1_539509\\.sh: line \\d+:\\s+\\d+ Killed",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Agentic workflow metadata (ci-failure-scan)
Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 2 hits in failure.log
Note
This issue was drafted with GitHub Copilot.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1619748
Error message validated: [test1_539509\.sh: line \d+:\s+\d+ Killed]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/1/2026 6:44:01 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 13 | 31 |
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dotnet-policy-service commentedon Oct 1, 2026
Tagging subscribers to this area: @dotnet/runtime-infrastructure
See info in area-owners.md if you want to be subscribed.
VincentBu commentedon Oct 12, 2026
Failed in: runtime-coreclr gcstress0x3-gcstress0xc 20261010.1
Failed tests:
Error message:
Stack trace:
VincentBu commentedon Oct 26, 2026
Failed in: runtime-coreclr gcstress0x3-gcstress0xc 20261024.1
Failed tests:
Error message:
Stack trace:
caraioniurie47 commentedon Oct 28, 2026
The same hang hit
GC/Features/LOHCompaction/lohpin/lohpin.cmdon the R2R-CG2 browser wasm Checked leg (Ubuntu.2604) of build 1651447 for #136454. The test body passes and node never exits:The
ErrorPatternhere names onlytest1_539509, so Build Analysis leaves it unmatched. Could the pattern cover it too, for example(test1_539509|lohpin)\.sh: line \d+:\s+\d+ Killed?Note
AI-generated, written at my direction and reviewed by me before posting. The log lines are from the work item's Helix console log; the pattern was tested against that log's
Killedline.dotnet-policy-service commentedon Oct 28, 2026
Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.
lewing commentedon Nov 3, 2026
@VincentBu the non browser errors should be resolved by #136869
lewing commentedon Nov 3, 2026
the browser hangs should be fixed by #136897
Release test1_539509's large static array before shutdown (#136869)
[browser][coreCLR] corerun: exit Node naturally after main returns (d…