# HG changeset patch
# User Bram Moolenaar <bram@vim.org>
# Date 1438083225 -7200
# Node ID 4bf9538ff25e208503d313ef99e661124394fbd2
# Parent  c622e7e60aa9fa722a003e766a46b49e96521920
patch 7.4.799
Problem:    Accessing memory before an allocated block.
Solution:   Check for not going before the start of a pattern. (Dominique
            Pelle)

diff --git a/src/fileio.c b/src/fileio.c
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -8514,7 +8514,7 @@ do_autocmd_event(event, pat, nested, cmd
 	 */
 	brace_level = 0;
 	for (endpat = pat; *endpat && (*endpat != ',' || brace_level
-					     || endpat[-1] == '\\'); ++endpat)
+			   || (endpat > pat && endpat[-1] == '\\')); ++endpat)
 	{
 	    if (*endpat == '{')
 		brace_level++;
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 */
 /**/
+    799,
+/**/
     798,
 /**/
     797,