# HG changeset patch
# User Bram Moolenaar <bram@vim.org>
# Date 1439299633 -7200
# Node ID dcc108222d704bbf6ac21cac3ad3b7324b2e45f1
# Parent  942510a7c61bcdb20401012fd2aac92804a063e5
patch 7.4.814
Problem:    Illegal memory access with "sy match a fold".
Solution:   Check for empty string. (Dominique Pelle)

diff --git a/src/syntax.c b/src/syntax.c
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -5654,7 +5654,7 @@ get_syn_pattern(arg, ci)
     char_u	*cpo_save;
 
     /* need at least three chars */
-    if (arg == NULL || arg[1] == NUL || arg[2] == NUL)
+    if (arg == NULL || arg[0] == NUL || arg[1] == NUL || arg[2] == NUL)
 	return NULL;
 
     end = skip_regexp(arg + 1, *arg, TRUE, NULL);
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 */
 /**/
+    814,
+/**/
     813,
 /**/
     812,