[ci-scan] Known Build Error: JIT AV in optAssertionPropMain during type comparison folding under jitstress on arm64

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1415298
Build error leg or test failing: windows-arm64 libraries-jitstress - Microsoft.Extensions.DependencyInjection.Tests

Error Message

{
  "ErrorMessage": ["Consistency check failed: AV in clr at this callstack:", "Compiler::optAssertionPropMain"],
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Summary:
JIT access violation during assertion propagation phase (optAssertionPropMain) under jitstress on windows-arm64. The AV occurs in TypeHandle::Verify called from CEEInfo::isExactType during type comparison folding (gtFoldTypeCompare). Different tests trigger the crash each build (DI tests, System.Text.Json.Tests), indicating a systemic JIT bug rather than a test-specific issue.

Failed in (2+):

• runtime-coreclr libraries-jitstress 1415298 — Microsoft.Extensions.DependencyInjection.Tests
• runtime-coreclr libraries-jitstress 1414757 — System.Text.Json.Tests

Console Log: Console Log

Failed tests:

runtime-coreclr libraries-jitstress (def 138)
- net11.0-windows-Release-arm64-jitstress2-Windows.11.Arm64.Open
  - Microsoft.Extensions.DependencyInjection.Tests (build 1415298)
  - System.Text.Json.Tests (build 1414757)

Error Message:

Assert failure(PID 9344 [0x00002480], Thread: 8548 [0x2164]): Consistency check failed: AV in clr at this callstack:
------
CORECLR! TypeHandle::Verify + 0x20
CORECLR! CEEInfo::isExactType + 0xC8
CLRJIT! Compiler::gtGetClassHandle + 0x920
CLRJIT! Compiler::gtGetTypeProducerKind + 0xF4
CLRJIT! Compiler::gtFoldTypeCompare + 0xEC
CLRJIT! Compiler::fgMorphSmpOp + 0x108C
CLRJIT! Compiler::fgMorphTree + 0x580
CLRJIT! Compiler::fgMorphBlockStmt + 0x84
CLRJIT! Compiler::optAssertionPropMain + 0xCCC

Stack Trace:

CLRJIT! Compiler::optAssertionPropMain + 0xCCC
exit code -1073740286

Recommended action: JIT product bug in type comparison folding under jitstress on ARM64. The AV fires in TypeHandle::Verify when the JIT queries isExactType during gtFoldTypeCompare in the assertion propagation phase. Investigation should focus on src/coreclr/jit/morph.cpp (gtFoldTypeCompare) and src/coreclr/vm/jitinterface.cpp (isExactType) for invalid type handle access under stress. cc @dotnet/jit-contrib @JulieLeeMSFT

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Note

🔒 Integrity filter blocked 4 items

The following items were blocked because they don't meet the GitHub integrity level.

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• #86273 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
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Generated by CI Outer-Loop Failure Scanner · ● 56.5M · ◷

Report

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	0

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1415298
Error message validated: [Consistency check failed: AV in clr at this callstack: Compiler::optAssertionPropMain]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/12/2026 11:31:25 AM UTC

Report

Build	Definition	Test	Pull Request
1415298	dotnet/runtime	Microsoft.Extensions.DependencyInjection.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	1	1

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1415298
Error message validated: [Consistency check failed: AV in clr at this callstack: Compiler::optAssertionPropMain]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/12/2026 11:31:25 AM UTC

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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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[kotlarmilos]

@EgorBo Here is the dump for DependencyInjection tests: #128177 (comment)