From f66ff0556ac8c0dcc3616d002eb77f8c52507c84 Mon Sep 17 00:00:00 2001
From: Charles Gueunet <charles.gueunet@gmail.com>
Date: Wed, 17 Apr 2019 22:54:56 +0200
Subject: [PATCH] fix(error): key with now impact on text

When pressing esc (to go out of vim insert mode), the function was
trigger with an empty string leading to an annoying permission denied.
---
 zsh-syntax-highlighting-filetypes.zsh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zsh-syntax-highlighting-filetypes.zsh b/zsh-syntax-highlighting-filetypes.zsh
index c6eb94d..e89ce60 100644
--- a/zsh-syntax-highlighting-filetypes.zsh
+++ b/zsh-syntax-highlighting-filetypes.zsh
@@ -78,7 +78,7 @@ _zsh_highlight-zle-buffer-p() {
   local region_highlight_size="$1" highlight_predicate="$2"
   # If any highlightings are not taken into account, asume it is needed.
   # This holds for some up/down-history commands, for example.
-  ((region_highlight_size == 0)) || "$highlight_predicate"
+  ((region_highlight_size == 0)) || [[ -n "$highlight_predicate" ]] && "$highlight_predicate"
 }
 
 # Whether the command line buffer is modified or not.