commit a59f2dfd0cf9ee1a584d3de5b7c2d47648e79060
author Bram Moolenaar <Bram@vim.org> Wed May 11 11:42:28 2022 +0100
committer Bram Moolenaar <Bram@vim.org> Wed May 11 11:42:28 2022 +0100
tree 7983fe4811bf949c7a7ca174775428a096a7e20d
parent ead241538cdd26cbf02599b6e23cd8baeafbcbb2

patch 8.2.4938: crash when matching buffer with invalid pattern

Problem:    Crash when matching buffer with invalid pattern.
Solution:   Check for NULL regprog.

src/testdir/test_buffer.vim

diff --git a/src/testdir/test_buffer.vim b/src/testdir/test_buffer.vim
index aea3995..55ef0fd 100644
--- a/src/testdir/test_buffer.vim
+++ b/src/testdir/test_buffer.vim
@@ -415,6 +415,10 @@
   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