[ci-scan] Build break: -cdacPath requires the matching universal DBI in runtime-diagnostics cDAC leg

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1582309
Build error leg or test failing: runtime-diagnostics (definition 309) — cDAC_windows_x64_release leg, eng/build.ps1 cDAC validation step.

Pipeline: runtime-diagnostics (definition 309), branch main. The SOS/cDAC test leg builds with -dacMode cdac -cdacPath .../artifacts/cdac/mscordaccore_universal.dll, then build.ps1 fails its own precondition check: it requires the matching universal DBI (mscordbi_universal.dll) to be present alongside the cDAC path, aborts with a WriteErrorException, and Cmd.exe exits code 1 before any test runs. This is a build/infra break, not a test failure — the leg never produces test results. Reproduces across source build 1582309 and follow-up build 1584156.

Error Details

D:\a\_work\1\s\eng\build.ps1 : -cdacPath requires the matching universal DBI at
'D:\a\_work\1\s\artifacts\cdac\mscordbi_universal.dll'.
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,build.ps1
##[error]Cmd.exe exited with code '1'.

Error Message

{
  "ErrorMessage": "-cdacPath requires the matching universal DBI at",
  "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
First build it occurred: 1582309

Duplicate search

Searched open/closed Known Build Error issues and merged PRs for cdacPath / universal DBI / mscordbi_universal. No existing KBE matches this runtime-diagnostics cDAC build break, and no fix PR has merged after the source build.

---

Filed by ci-failure-scan (detection only). ci-failure-fix walks open [ci-scan] KBEs and either opens a small fix PR or comments to loop in owners — it never disables the test.

Note

Generated by the CI Outer-Loop Failure Scanner agentic workflow (AI-generated content).

Generated by CI Outer-Loop Failure Scanner · opus48 · 457.6 AIC · ⌖ 13 AIC · ⊞ 20.7K · ◷

Report

Build	Repository	Step Name	Console log	Pull Request
1584744	dotnet/runtime	Build / Test	Log
1584637	dotnet/runtime	Build / Test	Log	#130050
1584624	dotnet/runtime	Build / Test	Log	#133265
1584496	dotnet/runtime	Build / Test	Log	#133309
1584464	dotnet/runtime	Build / Test	Log	#133308
1584432	dotnet/runtime	Build / Test	Log	#133265
1583986	dotnet/runtime	Build / Test	Log	#133203

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
3	7	7