patch 9.0.1555: setcharsearch() does not clear last searched char properly Commit: https://github.com/vim/vim/commit/e5d91ba1de83949eb9357c0fb8cbd91e7e69be6f Author: zeertzjq <zeertzjq@outlook.com> Date: Sun May 14 17:39:18 2023 +0100 patch 9.0.1555: setcharsearch() does not clear last searched char properly Problem: setcharsearch() does not clear last searched char properly. Solution: Do not accept lastc_bytelen smaller than one. (closes https://github.com/vim/vim/issues/12398)