[llvm-branch-commits] [libcxx] release/21.x: [libc++] Fix broken precondition of __bit_log2 (#155476) (PR #155932)

[Tobias Hieta via llvm-branch-commits]

tru wrote:

Confirmed with @philnik777 on Discord that it should be merged for 21.1.1.

https://github.com/llvm/llvm-project/pull/155932