From 54973477e7a7cc8f955d1755d3243e7f89461e34 Mon Sep 17 00:00:00 2001
From: Chiu-Hsiang Hsu <wdv4758h@gmail.com>
Date: Fri, 31 Jul 2015 02:18:18 +0800
Subject: [PATCH] vim-patch:7.4.799

Problem:    Accessing memory before an allocated block.
Solution:   Check for not going before the start of a pattern.  (Dominique Pelle)

https://github.com/vim/vim/commit/v7-4-799
---
 src/nvim/fileio.c  | 11 +++++++----
 src/nvim/version.c |  2 +-
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/nvim/fileio.c b/src/nvim/fileio.c
index 70cdac7947..7689b750c5 100644
--- a/src/nvim/fileio.c
+++ b/src/nvim/fileio.c
@@ -5749,16 +5749,19 @@ static int do_autocmd_event(event_T event, char_u *pat, int nested, char_u *cmd,
      * Find end of the pattern.
      * Watch out for a comma in braces, like "*.\{obj,o\}".
      */
+    endpat = pat;
+    // ignore single comma
+    if (*endpat == ',') {
+      continue;
+    }
     brace_level = 0;
-    for (endpat = pat; *endpat && (*endpat != ',' || brace_level
-                                   || endpat[-1] == '\\'); ++endpat) {
+    for (; *endpat && (*endpat != ',' || brace_level || endpat[-1] == '\\');
+         ++endpat) {
       if (*endpat == '{')
         brace_level++;
       else if (*endpat == '}')
         brace_level--;
     }
-    if (pat == endpat)                  /* ignore single comma */
-      continue;
     patlen = (int)(endpat - pat);
 
     /*
diff --git a/src/nvim/version.c b/src/nvim/version.c
index c79c9d0f38..439292d0d6 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -98,7 +98,7 @@ static int included_patches[] = {
   //802,
   //801,
   //800,
-  //799,
+  799,
   //798,
   //797,
   //796,