From bc9da959c7a9230820f39255dee52efba27e5219 Mon Sep 17 00:00:00 2001
From: Fukaya Temma <tenma.fukaya@kyash.co>
Date: Fri, 30 Aug 2019 09:58:02 +0900
Subject: [PATCH] fix: duplicate frozen string

---
 lib/ruboty/adapters/slack_rtm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ruboty/adapters/slack_rtm.rb b/lib/ruboty/adapters/slack_rtm.rb
index b7078d3..82b0d8f 100644
--- a/lib/ruboty/adapters/slack_rtm.rb
+++ b/lib/ruboty/adapters/slack_rtm.rb
@@ -237,7 +237,7 @@ def extract_mention(text)
       end
 
       def resolve_send_mention(text)
-        text = text.to_s
+        text = text.dup.to_s
         text.gsub!(/@(?<mention>[0-9a-z._-]+)/) do |_|
           mention = Regexp.last_match[:mention]
           msg = "@#{mention}"