From 9c20edb310150356132d05c0a6c65f3531b77dc8 Mon Sep 17 00:00:00 2001
From: Victor Mayorov <victormayorov@v-mayorov-mac.local>
Date: Wed, 10 Jun 2015 17:58:35 +0300
Subject: [PATCH] Added checking that sessionTask hasn't been added during
 creation of previous one

---
 AsyncDisplayKit/Details/ASBasicImageDownloader.mm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/AsyncDisplayKit/Details/ASBasicImageDownloader.mm b/AsyncDisplayKit/Details/ASBasicImageDownloader.mm
index f6b4dfdd34..8f69b50e45 100644
--- a/AsyncDisplayKit/Details/ASBasicImageDownloader.mm
+++ b/AsyncDisplayKit/Details/ASBasicImageDownloader.mm
@@ -154,7 +154,11 @@ static ASDN::RecursiveMutex currentRequestsLock;
     if (self.isCancelled) {
       return nil;
     }
-    
+
+    if (self.sessionTask && (self.sessionTask.state == NSURLSessionTaskStateRunning)) {
+      return nil;
+    }
+
     self.sessionTask = newTask;
     
     return self.sessionTask;