patch 8.2.4938: crash when matching buffer with invalid pattern Commit: https://github.com/vim/vim/commit/a59f2dfd0cf9ee1a584d3de5b7c2d47648e79060 Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 11 11:42:28 2022 +0100 patch 8.2.4938: crash when matching buffer with invalid pattern Problem: Crash when matching buffer with invalid pattern. Solution: Check for NULL regprog.

--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2932,7 +2932,7 @@ buflist_match(
 
     // First try the short file name, then the long file name.
     match = fname_match(rmp, buf->b_sfname, ignore_case);
-    if (match == NULL)
+    if (match == NULL && rmp->regprog != NULL)
 	match = fname_match(rmp, buf->b_ffname, ignore_case);
 
     return match;