commit 5921aeb5741fc6e84c870d68c7c35b93ad0c9f87
author Bram Moolenaar <Bram@vim.org> Sat Feb 19 11:20:12 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Sat Feb 19 11:20:12 2022 +0000
tree 4021a330986b5974383318a43a0e440b6bfb7503
parent e89bfd212b21c227f026e467f882c62cdd6e642d

patch 8.2.4418: crash when using special multi-byte character

Problem:    Crash when using special multi-byte character.
Solution:   Don't use isalpha() for an arbitrary character.

src/filepath.c

diff --git a/src/filepath.c b/src/filepath.c
index 929fa56..7a5dae4 100644
--- a/src/filepath.c
+++ b/src/filepath.c
@@ -3626,7 +3626,7 @@
 	else if (path_end >= path + wildoff
 			 && (vim_strchr((char_u *)"*?[{~$", *path_end) != NULL
 			     || (!p_fic && (flags & EW_ICASE)
-					     && isalpha(PTR2CHAR(path_end)))))
+					  && vim_isalpha(PTR2CHAR(path_end)))))
 	    e = p;
 	if (has_mbyte)
 	{