From 1e7b5a0a983dd997a3123526a51a9dfb8d8a294f Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Fri, 7 Dec 2018 17:54:35 +0900
Subject: [PATCH] Resolve #3529

---
 src/mfm/parser.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mfm/parser.ts b/src/mfm/parser.ts
index de1bc89d2b..8970d14840 100644
--- a/src/mfm/parser.ts
+++ b/src/mfm/parser.ts
@@ -211,6 +211,7 @@ const mfm = P.createLanguage({
 			hashtag = hashtag.substr(0, getTrailingPosition(hashtag));
 			if (hashtag.match(/^[0-9]+$/)) return P.makeFailure(i, 'not a hashtag');
 			if (input[i - 1] != null && input[i - 1].match(/[a-z0-9]/i)) return P.makeFailure(i, 'not a hashtag');
+			if (hashtag.length > 30) return P.makeFailure(i, 'not a hashtag');
 			return P.makeSuccess(i + ('#' + hashtag).length, makeNode('hashtag', { hashtag: hashtag }));
 		}),
 	//#endregion