ios - Grand Central Dispatch EXC_BAD_ACCESS Exception -


I have an empty block that runs fine in the iPhone 6.0 simulator in Xcode, but when I switch to the iPhone 5.1 simulator Exception to the following: "EXC_BAD_ACCESS". 

  Sender_Assic (send_gate_global_que (DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^ {// I have removed all the codes from here and the exception is still.});   
 Any idea what happens to this? The exception is thrown on sender_sync line. I'm sure if this is the case, although I am using ARC.   
 
 
 Error on my part, I have fixed the iOS deployment target at 6.0. I updated it to 5.1 and it works fine.

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