vim-patch:7.4.814

Problem:    Illegal memory access with "sy match a fold".
Solution:   Check for empty string. (Dominique Pelle)

382197865c

src/nvim/syntax.c

@@ -4843,9 +4843,10 @@ static char_u *get_syn_pattern(char_u *arg, synpat_T *ci)
   int idx;
   char_u      *cpo_save;
 
-  /* need at least three chars */
+  // 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);
   if (*end != *arg) {                       /* end delimiter not found */

src/nvim/version.c

@@ -474,7 +474,7 @@ static int included_patches[] = {
   // 817,
   // 816,
   // 815,
-  // 814,
+  814,
   813,
   // 812,
   811,