From e031fe90cf2e375ce861ff5e5e281e4ad229ebb9 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 5 Dec 2021 12:06:24 +0000
Subject: [PATCH] patch 8.2.3741: using freed memory in open command

Problem:    Using freed memory in open command.
Solution:   Make a copy of the current line.

Reference:https://github.com/vim/vim/commit/e031fe90cf2e375ce861ff5e5e281e4ad229ebb9
Conflict:src/testdir/test_ex_mode.vim, The current version does not exist and therefore does not fit into this test case
---
 src/ex_docmd.c | 10 +++++++---
 src/version.c  |  2 ++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 203174a..cb6b64a 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -6030,13 +6030,17 @@ ex_open(exarg_T *eap)
 	regmatch.regprog = vim_regcomp(eap->arg, p_magic ? RE_MAGIC : 0);
 	if (regmatch.regprog != NULL)
 	{
+	    // make a copy of the line, when searching for a mark it might be
+	    // flushed
+	    char_u *line = vim_strsave(ml_get_curline());
+
 	    regmatch.rm_ic = p_ic;
-	    p = ml_get_curline();
-	    if (vim_regexec(&regmatch, p, (colnr_T)0))
-		curwin->w_cursor.col = (colnr_T)(regmatch.startp[0] - p);
+	    if (vim_regexec(&regmatch, line, (colnr_T)0))
+		curwin->w_cursor.col = (colnr_T)(regmatch.startp[0] - line);
 	    else
 		emsg(_(e_nomatch));
 	    vim_regfree(regmatch.regprog);
+	    vim_free(line);
 	}
 	// Move to the NUL, ignore any other arguments.
 	eap->arg += STRLEN(eap->arg);
diff --git a/src/version.c b/src/version.c
index 035c46f..bd45631 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3741,
 /**/
     3403,
 /**/
-- 
2.27.0