tadeja opened a new pull request, #49931: URL: https://github.com/apache/arrow/pull/49931
### Rationale for this change Both MinGW jobs fail every run since 2026 April 30, likely because of two MSYS2 updates: 1. MINGW64: `gcc 15.2 -> 16.1` made the intermittent `__emutls` race in `ThreadPool` always reproduce (see #49272, fix in #49462). 2. Both MINGW64 and CLANG64: `aws-sdk-cpp 1.11.479 -> 1.11.801` stopped sending `Content-Md5` on `DeleteObjects`; bundled MinIO `RELEASE.2024-09-13` still requires it. ### What changes are included in this PR? CI change, new `Pin MSYS2 packages` step in `cpp.yml` ### Are these changes tested? Tested on a fork: [failing](https://github.com/tadeja/arrow/actions/runs/25371378601) -> [passing](https://github.com/tadeja/arrow/actions/runs/25381631674) ### Are there any user-facing changes? No -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
