From bc1a5db6cc103f125a3705970d0018fb145aca4a Mon Sep 17 00:00:00 2001
From: Stéphane Campinas <stephane.campinas@gmail.com>
Date: Sat, 10 Sep 2016 20:35:47 +0100
Subject: vim-patch:7.4.1547 #5326

Problem:    Getting a cterm highlight attribute that is not set results in the
            string "-1".
Solution:   Return an empty string. (Taro Muraoka)

https://github.com/vim/vim/commit/385111bd86e0b38667879c3e89506ca1ae98e1df
---
 src/nvim/syntax.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'src/nvim/syntax.c')

diff --git a/src/nvim/syntax.c b/src/nvim/syntax.c
index c753c6fabd..6fd7603629 100644
--- a/src/nvim/syntax.c
+++ b/src/nvim/syntax.c
@@ -7001,11 +7001,15 @@ highlight_color (
   if (font || sp)
     return NULL;
   if (modec == 'c') {
-    if (fg)
+    if (fg) {
       n = HL_TABLE()[id - 1].sg_cterm_fg - 1;
-    else
+    } else {
       n = HL_TABLE()[id - 1].sg_cterm_bg - 1;
-    sprintf((char *)name, "%d", n);
+    }
+    if (n < 0) {
+      return NULL;
+    }
+    snprintf((char *)name, sizeof(name), "%d", n);
     return name;
   }
   /* term doesn't have color */
-- 
cgit