commit 5937c7505f444dd896f336fa0119a93a55ebe9a2
author Bram Moolenaar <Bram@vim.org> Fri Dec 24 16:46:14 2021 +0000
committer Bram Moolenaar <Bram@vim.org> Fri Dec 24 16:46:14 2021 +0000
tree 0a4b41be25a8752a8063d15a63e808afe9df89a8
parent fa3b72348d88343390fbe212cfc230fec1602fc2

patch 8.2.3883: crash when switching to other regexp engine fails

Problem:    Crash when switching to other regexp engine fails.
Solution:   Check for regprog being NULL.

src/ex_cmds.c

diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 10c8e61..1404526 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -4975,6 +4975,8 @@
 	    // a match on this line?
 	    match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
 						       (colnr_T)0, NULL, NULL);
+	    if (regmatch.regprog == NULL)
+		break;  // re-compiling regprog failed
 	    if ((type == 'g' && match) || (type == 'v' && !match))
 	    {
 		ml_setmarked(lnum);