From 1afe26afb3ebf0166131fee7265e3adf6675967e Mon Sep 17 00:00:00 2001
From: Simon Grim <scary@tasty.sexy>
Date: Sat, 24 Oct 2015 02:10:58 +0500
Subject: [PATCH] fix check for emptiness of input in htmlFormatMsg()

---
 js/twister_formatpost.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/js/twister_formatpost.js b/js/twister_formatpost.js
index 4489050..77e1e10 100644
--- a/js/twister_formatpost.js
+++ b/js/twister_formatpost.js
@@ -603,6 +603,11 @@ function htmlFormatMsg(msg) {
         return msg.str;
     }
 
+    if (!msg) {
+        console.warn('htmlFormatMsg() error: input string is empty');
+        return {html: '', mentions: []};
+    }
+
     var mentionsChars = 'abcdefghijklmnopqrstuvwxyz_0123456789';
     var stopCharsTrailing = '/\\*~_-`.,:;?!%\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011\u2047\u2048\u2049';
     var stopCharsTrailingUrl = stopCharsTrailing.slice(1);