From f6f3ab5b822c8273f9f72d3ed50bffd79bb96742 Mon Sep 17 00:00:00 2001
From: mAAdhaTTah <jamesorodig@gmail.com>
Date: Tue, 26 Sep 2017 22:59:32 -0400
Subject: [PATCH] Check if tokens exists and return

If the language was autoloaded, the grammar may not exist yet.
We need to check if it exists before we attempt to modify it.
---
 plugins/show-invisibles/prism-show-invisibles.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/show-invisibles/prism-show-invisibles.js b/plugins/show-invisibles/prism-show-invisibles.js
index 72833fa949..f3d120a9e8 100644
--- a/plugins/show-invisibles/prism-show-invisibles.js
+++ b/plugins/show-invisibles/prism-show-invisibles.js
@@ -10,6 +10,8 @@ if (
 Prism.hooks.add('before-highlight', function(env) {
 	var tokens = env.grammar;
 
+	if (!tokens) return;
+
 	tokens.tab = /\t/g;
 	tokens.crlf = /\r\n/g;
 	tokens.lf = /\n/g;