pitrou opened a new issue, #49586: URL: https://github.com/apache/arrow/issues/49586
### Describe the bug, including details regarding any error messages, version, and platform. This has started appearing on MinGW CLang CI, see https://github.com/apache/arrow/actions/runs/23467758420/job/68341855187 for example The root cause is in a libc++ change in `std::multimap`, see https://github.com/llvm/llvm-project/pull/152370#issuecomment-4117495445 . It's unclear yet whether our code or the libc++ change is incorrect. ### Component(s) C++, Continuous Integration -- 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]
