From dc6ba104a83d3f372b87f00d3fa22fc5d1100abf Mon Sep 17 00:00:00 2001
From: ccd0 <admin@containerchan.org>
Date: Thu, 28 Jan 2016 14:05:06 -0800
Subject: [PATCH] Handle case when setup() is quickly followed by destroy().
 #615

---
 src/Posting/Captcha.v2.coffee | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Posting/Captcha.v2.coffee b/src/Posting/Captcha.v2.coffee
index 326f888ab..aea247525 100644
--- a/src/Posting/Captcha.v2.coffee
+++ b/src/Posting/Captcha.v2.coffee
@@ -128,6 +128,7 @@ Captcha.v2 =
     return
 
   setupIFrame: (iframe) ->
+    return unless doc.contains iframe
     Captcha.replace.iframe iframe
     $.addClass QR.nodes.el, 'captcha-open'
     @fixQRPosition()