[llvm-branch-commits] [libcxx] [lldb] release/21.x: [libc++] Ensure that we restore invariants in basic_filebuf::overflow (#147389) (PR #155712)

[Nikolas Klauser via llvm-branch-commits]

philnik777 wrote:

Yeah, this should be good. We should probably also backport the AIX CI fix (I just have to remember where it was).

https://github.com/llvm/llvm-project/pull/155712