# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1652265904 -7200
# Node ID 2d0bd5601c3081c3a22a7332eabcce2db13c85ea
# Parent  f4d6061c882f183c3074b30a8faa6be53d04a33c
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.

diff --git a/src/buffer.c b/src/buffer.c
--- 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;
diff --git a/src/testdir/test_buffer.vim b/src/testdir/test_buffer.vim
--- a/src/testdir/test_buffer.vim
+++ b/src/testdir/test_buffer.vim
@@ -415,6 +415,10 @@ func Test_buf_pattern_invalid()
   vsplit 0000000
   silent! buf [0--]\&\zs*\zs*e
   bwipe!
+
+  vsplit 00000000000000000000000000
+  silent! buf [0--]\&\zs*\zs*e
+  bwipe!
 endfunc
 
 " Test for the 'maxmem' and 'maxmemtot' options
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4938,
+/**/
     4937,
 /**/
     4936,