Revert dotnet-optimization dependency update from #129405 by Copilot · Pull Request #129706 · dotnet/runtime

Copilot · 2026-06-22T18:34:01Z

The windows-x86 release CoreCLR_Libraries build failed in the MergeMibcFiles target of src/coreclr/crossgen-corelib.proj with MSB3077. dotnet-pgo merge printed a non-fatal "Attempting to merge MIBCs collected on different RIDs: Windows-x86 != Windows-x64" message (restored optimization data mixes mibc files whose embedded RID metadata differs) and still exited 0, but MSBuild's Exec task scanned the output, treated that line as an error, and failed the build.

The regression was traced to the dotnet-optimization package update in #129405 (MIBC/PGO packages bumped from 1.0.0-prerelease.26276.2 to 1.0.0-prerelease.26317.1). Rather than masking the symptom, this PR reverts that dependency update so the underlying package change can be investigated separately.

Change

eng/Version.Details.props and eng/Version.Details.xml — reverted the dotnet-optimization MIBC/PGO dependencies from 1.0.0-prerelease.26317.1 back to 1.0.0-prerelease.26276.2 (and the corresponding SHA 4c45d9931b393b94ee8ae20e20ced71a02317e19 back to 66482c2bec0351f496e4cc18d98f0f55f78b0c78), undoing [main] Update dependencies from dnceng/internal/dotnet-optimization #129405.
src/coreclr/crossgen-corelib.proj — restored to its original <Exec Command="$(DotNetPgoCmd)" />, dropping the earlier IgnoreStandardErrorWarningFormat="true" workaround.

Notes

These are dependency-version metadata changes only, so no build/test run was required.

… fail build Co-authored-by: EgorBo <523221+EgorBo@users.noreply.github.com>

EgorBo · 2026-06-22T19:05:46Z

Seems like it was regressed via #129405, the proposed fix in this PR just masks it out (although, generally it should be fine to use MIBC from any RID on any RID so the fix seems to be fine to me), but we probably need to figure out what happened to dotnet-optimization package.

EgorBo · 2026-06-22T19:16:42Z

@copilot please revert #129405 instead

…3077 Co-authored-by: EgorBo <523221+EgorBo@users.noreply.github.com>

Copilot · 2026-06-22T19:22:05Z

@copilot please revert #129405 instead

Done. Reverted the dotnet-optimization dependency bump from #129405 (1.0.0-prerelease.26317.1 → 1.0.0-prerelease.26276.2) in eng/Version.Details.props and eng/Version.Details.xml, and restored src/coreclr/crossgen-corelib.proj to its original Exec (dropping the IgnoreStandardErrorWarningFormat workaround).

Note

This response was generated by AI/Copilot.

Copilot

Pull request overview

This PR reverts a recent dotnet-optimization dependency bump by restoring the prior MIBC/PGO package versions and SHAs, aiming to return the repo to a previously working state while the underlying regression in the newer packages is investigated separately.

Changes:

Revert optimization.*.MIBC.Runtime and optimization.PGO.CoreCLR versions from 1.0.0-prerelease.26317.1 back to 1.0.0-prerelease.26276.2 (including the corresponding commit SHA rollback).
Restore src/coreclr/crossgen-corelib.proj’s MergeMibcFilesExec invocation to the original form (no IgnoreStandardErrorWarningFormat workaround).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
eng/Version.Details.props	Rolls back `dotnet-optimization` package version properties to the prior prerelease version.
eng/Version.Details.xml	Rolls back the recorded dependency versions and SHAs for the `dotnet-optimization` inputs (MIBC + PGO).
src/coreclr/crossgen-corelib.proj	Restores the original `dotnet-pgo mergeExec` configuration in `MergeMibcFiles`.

EgorBo · 2026-06-22T19:48:12Z

PTAL @dotnet/jit-contrib a revert to unblock CI, see #129705

AndyAyersMS · 2026-06-23T00:56:18Z

/ba-g wasm tests timeout

The `windows-x86 release CoreCLR_Libraries` build failed in the `MergeMibcFiles` target of `src/coreclr/crossgen-corelib.proj` with `MSB3077`. `dotnet-pgo merge` printed a non-fatal "Attempting to merge MIBCs collected on different RIDs: Windows-x86 != Windows-x64" message (restored optimization data mixes mibc files whose embedded RID metadata differs) and still exited 0, but MSBuild's `Exec` task scanned the output, treated that line as an error, and failed the build. The regression was traced to the dotnet-optimization package update in #129405 (MIBC/PGO packages bumped from `1.0.0-prerelease.26276.2` to `1.0.0-prerelease.26317.1`). Rather than masking the symptom, this PR reverts that dependency update so the underlying package change can be investigated separately. ### Change - **`eng/Version.Details.props`** and **`eng/Version.Details.xml`** — reverted the dotnet-optimization MIBC/PGO dependencies from `1.0.0-prerelease.26317.1` back to `1.0.0-prerelease.26276.2` (and the corresponding SHA `4c45d9931b393b94ee8ae20e20ced71a02317e19` back to `66482c2bec0351f496e4cc18d98f0f55f78b0c78`), undoing #129405. - **`src/coreclr/crossgen-corelib.proj`** — restored to its original `<Exec Command="$(DotNetPgoCmd)" />`, dropping the earlier `IgnoreStandardErrorWarningFormat="true"` workaround. ### Notes - These are dependency-version metadata changes only, so no build/test run was required. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: EgorBo <523221+EgorBo@users.noreply.github.com>

Initial plan
62c522d

CopilotAI assigned Copilot and EgorBo Jun 22, 2026

CopilotAI requested review from Copilot and removed request for Copilot June 22, 2026 18:34

Copilotstarted work on behalf of EgorBo June 22, 2026 18:35 View session

Ignore dotnet-pgo merge output warning format so RID mismatch doesn't…
4922505
… fail build Co-authored-by: EgorBo <523221+EgorBo@users.noreply.github.com>

CopilotAI requested review from Copilot and removed request for Copilot June 22, 2026 18:48

CopilotAI changed the title ~~[WIP] Fix build failure due to merging MIBCs on different RIDs~~Fix build failure when merging MIBCs collected on different RIDsJun 22, 2026

Copilotfinished work on behalf of EgorBo June 22, 2026 18:49

CopilotAI requested a review from EgorBo June 22, 2026 18:49

github-actionsBot added the area-Infrastructure-coreclr Only use for closed issues label Jun 22, 2026

github-project-automationBot added this to Runtime Infra Jun 22, 2026

Copilotstarted work on behalf of EgorBo June 22, 2026 19:17 View session

Revert dotnet-optimization update from#129405instead of masking MSB…
a071511
…3077 Co-authored-by: EgorBo <523221+EgorBo@users.noreply.github.com>

CopilotAI requested review from Copilot and removed request for Copilot June 22, 2026 19:22

EgorBo approved these changes Jun 22, 2026
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CopilotAI changed the title ~~Fix build failure when merging MIBCs collected on different RIDs~~Revert dotnet-optimization dependency update from #129405Jun 22, 2026

EgorBo marked this pull request as ready for review June 22, 2026 19:22

Copilotfinished work on behalf of EgorBo June 22, 2026 19:22

CopilotAI review requested due to automatic review settings June 22, 2026 19:23

CopilotAI requested a review from EgorBo June 22, 2026 19:23

Copilotstarted reviewing on behalf of EgorBo June 22, 2026 19:23 View session

CopilotAI reviewed Jun 22, 2026
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AndyAyersMS approved these changes Jun 22, 2026
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jakobbotsch mentioned this pull request Jun 22, 2026
Compile runtime async versions of synchronous task-returning methods #128384
Merged

This was referenced Jun 23, 2026
tracing/runtimeeventsource/nativeruntimeeventsource/nativeruntimeeventsource failing in CI #90605
Open
The Operation will be canceled. The next steps may not contain expected logs. dotnet/dnceng#3008
Open

AndyAyersMS merged commit b308edd into mainJun 23, 2026
168 of 171 checks passed

AndyAyersMS deleted the copilot/fix-build-failure-windows branch June 23, 2026 00:56

github-project-automationBot moved this to Done in Runtime Infra Jun 23, 2026

dotnet-maestroBot mentioned this pull request Jun 23, 2026
[main] Source code updates from dotnet/runtime dotnet/dotnet#7320
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dotnet-milestone-botBot added this to the 11.0-preview6 milestone Jun 23, 2026

steveisok mentioned this pull request Jun 23, 2026
Intermittent build failure in AfterSourceBuild: "Could not write state file" #76488
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Revert dotnet-optimization dependency update from #129405 - #129706

Revert dotnet-optimization dependency update from #129405#129706
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