Commit 0308abf
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>
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