From 02a3300f25e796749d920e237f978c87c2a12bfd Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Fri, 10 Feb 2017 02:16:30 +0900
Subject: [PATCH] Fix bug

---
 src/common/text/elements/code.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/common/text/elements/code.js b/src/common/text/elements/code.js
index 456fe83f47..c3a3e86dd0 100644
--- a/src/common/text/elements/code.js
+++ b/src/common/text/elements/code.js
@@ -221,7 +221,9 @@ const elements = [
 	// label
 	code => {
 		if (code[0] != '@') return null;
-		const label = code.match(/^@([a-zA-Z_-]+?)\n/)[0];
+		const match = code.match(/^@([a-zA-Z_-]+?)\n/);
+		if (!match) return null;
+		const label = match[0];
 		return {
 			html: `<span class="label">${label}</span>`,
 			next: label.length