[llvm] [LLVM][DWARF] Make dwarf::getDebugNamesBucketCount return a pair. (PR #83047)

[via llvm-commits]

cmtice wrote:

The buildkit build failure appears to have not relation to this change. Does anybody know how I can force the build test to re-run, so that I can get a green "Squash and merge" button?

https://github.com/llvm/llvm-project/pull/83047