# HG changeset patch
# User Bram Moolenaar <bram@vim.org>
# Date 1438086348 -7200
# Node ID 86d43639de31ba99947cf9bfe0a3fd171ca7019e
# Parent  6c62ad33faf2519738c69da4ebf49930f2f7700f
patch 7.4.800
Problem:    Using freed memory when triggering CmdUndefined autocommands.
Solution:   Set pointer to NULL. (Dominique Pelle)

diff --git a/src/ex_docmd.c b/src/ex_docmd.c
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -2365,8 +2365,9 @@ do_one_cmd(cmdlinep, sourcing,
 	p = vim_strnsave(ea.cmd, (int)(p - ea.cmd));
 	ret = apply_autocmds(EVENT_CMDUNDEFINED, p, p, TRUE, NULL);
 	vim_free(p);
-	if (ret && !aborting())
-	    p = find_command(&ea, NULL);
+	/* If the autocommands did something and didn't cause an error, try
+	 * finding the command again. */
+	p = (ret && !aborting()) ? find_command(&ea, NULL) : NULL;
     }
 #endif
 
diff --git a/src/version.c b/src/version.c
--- 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 */
 /**/
+    800,
+/**/
     799,
 /**/
     798,