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[ci-scan] Test failure: Runtime_115979 asserts in ValidateInner on WASI R2R #136153
Description
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1636145
Build error leg or test failing: wasi-wasm linux Checked CoreCLR_WASI_RuntimeTests_R2R_CG2 - JIT.opt - JIT/opt/ObjectStackAllocation/Runtime_115979/Runtime_115979.dll
Pull request: #135823
Console log: https://helix.dot.net/api/2019-06-17/jobs/2f41c15f-fdcb-4079-9c2c-2a640e7b7e3e/workitems/JIT.opt/console
GC stack-root enumeration asserts in Object::ValidateInner while running Runtime_115979 in a composite WASI ReadyToRun image.
This appears unrelated to #135823, which changes ArgumentNullException.ThrowIfNull boxing folding; the failing test does not call that API. Causality has not been established by a baseline comparison.
Possibly related: #135966 tracks uninitialized GC slots in browser-wasm R2R, with a proposed fix in #135970. Its matcher covers TypeIntrinsics_r/_ro, not this test. #135313 covers a different WASI stack involving ResolveVirtualFunctionPointer and WasmR2RToInterpreterThunk; neither frame appears here. A common root cause has not been established.
KBE authoring guidance (ci-failure-scan)
Error Detailsis for readers. The full assertion and native stack are included below.- Build Analysis parses only the single JSON block under
Error Message. - Each
ErrorMessagearray element is a case-sensitive ordinal substring copied verbatim from the failing log; elements must match in order. BuildRetryis false because this is a runtime assertion, not an infrastructure retry failure.ExcludeConsoleLogis false because the native assertion is present in the Helix console log.
Error Details
00:28:38.379 Running test: JIT/opt/ObjectStackAllocation/Runtime_115979/Runtime_115979.dll
ASSERT FAILED
Expression: !CREATE_CHECK_STRING(pMT && pMT->Validate())
Location: /__w/1/s/src/coreclr/vm/object.cpp:509
Function: ValidateInner
Process: 42
Error: failed to run main module `/root/helix/work/workitem/e/JIT/opt/JIT.opt/IL-CG2/wasi-r2r/corerun-composite.wasm`
Caused by:
0: failed to invoke `run` function
1: error while executing at wasm backtrace:
0: 0x587c1a - corerun!DebugBreak
1: 0x334761 - corerun!Object::ValidateInner(int, int, int)
2: 0x3344fe - corerun!Object::Validate(int, int, int)
3: 0x3bfffd - corerun!TGcInfoDecoder<Wasm32GcInfoEncoding>::ReportStackSlotToGC(int, GcStackSlotBase, unsigned int, REGDISPLAY*, unsigned int, void (*)(void*, OBJECTREF*, unsigned int), void*)
4: 0x3bf56f - corerun!TGcInfoDecoder<Wasm32GcInfoEncoding>::ReportSlotToGC(GcSlotDecoder<Wasm32GcInfoEncoding>&, unsigned int, REGDISPLAY*, bool, unsigned int, void (*)(void*, OBJECTREF*, unsigned int), void*)
5: 0x3bdb94 - corerun!TGcInfoDecoder<Wasm32GcInfoEncoding>::EnumerateLiveSlots(REGDISPLAY*, bool, unsigned int, void (*)(void*, OBJECTREF*, unsigned int), void*)
6: 0x18e908 - corerun!EECodeManager::EnumGcRefs(REGDISPLAY*, EECodeInfo*, unsigned int, void (*)(void*, OBJECTREF*, unsigned int), void*, unsigned int)
7: 0x1e0ef3 - corerun!GcStackCrawlCallBack(CrawlFrame*, void*)
8: 0x17ae7b - corerun!Thread::MakeStackwalkerCallback(CrawlFrame*, StackWalkAction (*)(CrawlFrame*, void*), void*, unsigned int)
9: 0x17b111 - corerun!Thread::StackWalkFramesEx(REGDISPLAY*, StackWalkAction (*)(CrawlFrame*, void*), void*, unsigned int, Frame*)
10: 0x17db30 - corerun!Thread::StackWalkFrames(StackWalkAction (*)(CrawlFrame*, void*), void*, unsigned int, Frame*)
11: 0x3c6c47 - corerun!ScanStackRoots(Thread*, void (*)(Object**, ScanContext*, unsigned int), ScanContext*)
12: 0x3c6773 - corerun!GCToEEInterface::GcScanRoots(void (*)(Object**, ScanContext*, unsigned int), int, int, ScanContext*)
13: 0x3d8025 - corerun!GCScan::GcScanRoots(void (*)(Object**, ScanContext*, unsigned int), int, int, ScanContext*)
14: 0x3e145c - corerun!WKS::gc_heap::mark_phase(int)
15: 0x3e27a6 - corerun!WKS::gc_heap::gc1()
16: 0x3e3a85 - corerun!WKS::gc_heap::garbage_collect(int)
17: 0x3e7069 - corerun!WKS::GCHeap::GarbageCollectGeneration(unsigned int, gc_reason)
18: 0x3f0d67 - corerun!WKS::gc_heap::try_allocate_more_space(alloc_context*, unsigned long, unsigned int, int)
19: 0x3f0da9 - corerun!WKS::gc_heap::allocate_more_space(alloc_context*, unsigned long, unsigned int, int)
note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable may show more debugging information
2: wasm trap: wasm `unreachable` instruction executed
Error Message
{
"ErrorMessage": [
"Running test: JIT/opt/ObjectStackAllocation/Runtime_115979/Runtime_115979.dll",
"Expression: !CREATE_CHECK_STRING(pMT && pMT->Validate())"
],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Agentic workflow metadata (ci-failure-scan)
Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 1 hits in failure.log
Note
This issue was prepared with GitHub Copilot assistance.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1636145
Error message validated: [Running test: JIT/opt/ObjectStackAllocation/Runtime_115979/Runtime_115979.dll Expression: !CREATE_CHECK_STRING(pMT && pMT->Validate())]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/20/2026 2:00:06 PM UTC
Report
| Build | Repository | Test | Pull Request |
|---|---|---|---|
| 1636145 | dotnet/runtime | JIT.opt.WorkItemExecution | #135823 |
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 0 | 1 |
Activity
dotnet-policy-service commentedon Oct 20, 2026
Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
See info in area-owners.md if you want to be subscribed.
dotnet-policy-service commentedon Oct 20, 2026
Tagging subscribers to this area: @dotnet/crossgen-contrib
See info in area-owners.md if you want to be subscribed.