[llvm-branch-commits] [flang] release/22.x: [flang][Lower] Fix UB in location handling (#177944) (PR #177965)

[Tom Eccles via llvm-branch-commits]

tblah wrote:

This fixes an issue called out by the release manager: https://github.com/llvm/llvm-project/issues/176404

https://github.com/llvm/llvm-project/pull/177965