[ci-scan] Test failure: HandlerException assertion INTERPRETER_CODE_POISON in SetInterpreterCode

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1461426
Build error leg or test failing: coreclr Pri1 Runtime Tests Run linux arm64 checked - baseservices-exceptions

Error Details

The interpreter-mode runtime test baseservices/exceptions/regressions/V1/SEH/VJ/HandlerException/HandlerException.cmd fails with a native assertion in SetInterpreterCode (method.hpp:1950). The assertion dac_cast<TADDR>(m_interpreterCode) != INTERPRETER_CODE_POISON fires, causing an Aborted (core dumped) crash.

ASSERT FAILED
	Expression: dac_cast<TADDR>(m_interpreterCode) != INTERPRETER_CODE_POISON
	Location:   /__w/1/s/src/coreclr/vm/method.hpp:1950
	Function:   SetInterpreterCode
	Process:    35200

Affected legs:

• runtime-interpreter (def 316): linux arm64 checked (azurelinux.3.arm64.open)

First build it occurred:

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1424718
• Finished: 2026-05-18
• Persistent across the entire scanned window (13 consecutive builds); true origin may predate 2026-05-18. No succeeded builds exist for this pipeline.
• Confirmed in follow-up: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1464535 (2026-06-15)

Error Message

{
  "ErrorMessage": "dac_cast<TADDR>(m_interpreterCode) != INTERPRETER_CODE_POISON",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

---

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Note

🔒 Integrity filter blocked 9 items

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

• #129159 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #128392 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #127128 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #127131 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #96038 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #81869 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #8692 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #9087 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #114222 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by CI Outer-Loop Failure Scanner · ● 39.9M · ◷

Report

Build	Repository	Test	Pull Request
1480683	dotnet/runtime	GC/Scenarios/THDChaos/thdchaos/thdchaos.cmd	#129795
1479249	dotnet/runtime	threading_group2.WorkItemExecution
1479255	dotnet/runtime	IntrinsicsInSystemPrivateCoreLib.Tests.WorkItemExecution
1472538	dotnet/runtime	JIT/Regression/CLR-x86-JIT/V1.1-M1-Beta1/b143840/b143840/b143840.cmd

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	4	4

[dotnet-policy-service]

Tagging subscribers to this area: @JulieLeeMSFT, @BrzVlad, @janvorli, @kg
See info in area-owners.md if you want to be subscribed.

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Details

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Review the workflow run logs for details.

Workflow artifact: ci-fix
Artifact kind: handoff
Linked KBE: #129465

Root-cause analysis

The interpreter-mode runtime test baseservices/exceptions/regressions/V1/SEH/VJ/HandlerException/HandlerException.cmd crashes with a native assertion failure:

ASSERT FAILED
    Expression: dac_cast(m_interpreterCode) != INTERPRETER_CODE_POISON
    Location:   /__w/1/s/src/coreclr/vm/method.hpp:1950
    Function:   SetInterpreterCode
    Process:    35200

Timeline:

• First appeared: Build 1424718, 2026-05-18
• Persistent across the entire scanned window (13 consecutive builds); true origin may predate 2026-05-18
• Platform: linux arm64 checked, runtime-interpreter (def 316)
• Confirmed in follow-up: Build 1464535, 2026-06-15

No code fix producible: This is a VM-level assertion in the interpreter's SetInterpreterCode path (method.hpp:1950). The INTERPRETER_CODE_POISON guard fires during exception handling in an interpreter-mode runtime test. This is a runtime-internal invariant violation in the interpreter exception handling path and is out of bounds for an automated fix.

Suggested reviewers / area contacts

• @BrzVlad (area-CodeGen-Interpreter-coreclr owner, already assigned to this issue)

---

Filed by ci-failure-fix, which attempts validated fixes for [ci-scan] Known Build Errors and otherwise loops in owners. Comment here or on the workflow file to suggest changes; ci-failure-scan-feedback reads in-scope feedback daily and opens (or updates) a PR with prompt edits.

Note

🔒 Integrity filter blocked 2 items

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

• #128501 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• [ci-scan] Test failure: OutOfMemoryException.cmd on NativeAOT CET/CFG #129209 issue_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by CI Outer-Loop Failure Fixer · ● 17.1M · ◷