[ci-scan] Build break: crosscomp.h CONTEXT_UNWOUND_TO_CALL macro redefinition in runtime-diagnostics

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1452363
Build error leg or test failing: DAC_windows_x64_release / cDAC_windows_x64_release / cDAC_no_fallback_windows_x64_release

Error Details

All three DAC build legs in runtime-diagnostics (def 309) fail with a C++ compilation error in crosscomp.h line 199. The Windows SDK winnt.h (10.0.28000.0) now defines CONTEXT_UNWOUND_TO_CALL, colliding with the definition in src/shared/inc/crosscomp.h. Since /WX (warnings as errors) is enabled, the C4005 macro-redefinition warning promotes to a hard error.

FAILED: [code=2] src/SOS/Strike/CMakeFiles/sos.dir/disasmARM64.cpp.obj
src\shared\inc\crosscomp.h(199): error C2220: the following warning is treated as an error
src\shared\inc\crosscomp.h(199): warning C4005: 'CONTEXT_UNWOUND_TO_CALL': macro redefinition
C:\Program Files (x86)\Windows Kits\10\include\10.0.28000.0\um\winnt.h(4340): note: see previous definition of 'CONTEXT_UNWOUND_TO_CALL'
ninja: build stopped: subcommand failed.

Error Message

true only for clear infra flakes. ExcludeConsoleLog skips helix log scanning. -->

{
  "ErrorMessage": "crosscomp.h(199): warning C4005: 'CONTEXT_UNWOUND_TO_CALL': macro redefinition",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Impact on platforms

• runtime-diagnostics (def 309) / DAC_windows_x64_release / Build / Test / exit code 1
• runtime-diagnostics (def 309) / cDAC_windows_x64_release / Build / Test / exit code 1
• runtime-diagnostics (def 309) / cDAC_no_fallback_windows_x64_release / Build / Test / exit code 1

First build it occurred

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1450770
• Finished: 2026-06-05T05:18:14Z
• Commit: (from main branch)
• Occurrences in window: 3 (builds 1450770, 1452363, 1452869)
• Last green build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1449070 (2026-06-04)
• Computed within the scanned window; may not be the true origin.

Duplicate search

• CONTEXT_UNWOUND_TO_CALL crosscomp label:"Known Build Error" — 0 results
• crosscomp.h C4005 macro redefinition diagnostics — 0 results
• crosscomp.h disasmARM64 diagnostics — 0 results
• is:pr is:open crosscomp.h CONTEXT_UNWOUND_TO_CALL — integrity-filtered PR Arm64: [PAC-RET] Add Pointer Authentication support for Arm64 #125436 (cannot verify)
• is:pr is:merged crosscomp.h CONTEXT_UNWOUND_TO_CALL merged:>=2026-06-06 — 0 results

No existing KBE matches this signature.

---

Filed by ci-failure-scan, which scans dnceng-public outer-loop pipelines on main and converts stable failures into KBEs and test-disable PRs. 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 15 items

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

• #125436 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #90711 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66563 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #56156 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #127367 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #115324 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #128466 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #129042 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #92420 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #58388 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #38958 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #68491 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #96066 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #107632 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 · ● 68.8M · ◷

Report

Build	Repository	Step Name	Console log	Pull Request
1454733	dotnet/runtime	Build / Test	Log	#129091
1454652	dotnet/runtime	Build / Test	Log	#128448
1454514	dotnet/runtime	Build / Test	Log	#128872
1453898	dotnet/runtime	Build / Test	Log	#128479
1453881	dotnet/runtime	Build / Test	Log	#128950
1453875	dotnet/runtime	Build / Test	Log	#125436
1453798	dotnet/runtime	Build / Test	Log	#128448
1453750	dotnet/runtime	Build / Test	Log	#129098
1453693	dotnet/runtime	Build / Test	Log	#129120
1453414	dotnet/runtime	Build / Test	Log	#129114
1453369	dotnet/runtime	Build / Test	Log
1453329	dotnet/runtime	Build / Test	Log	#129109
1453313	dotnet/runtime	Build / Test	Log	#128921

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
13	13	13

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