Attempt to fix #1883 by using a weakSelf reference to remove from callbackBlocks (on the barrierQueue)
Attempt to fix #1883 by using a weakSelf reference to remove from callbackBlocks (on the barrierQueue)

zhang-yawei/SDWebImage,altrooz/SDWebImage,odyth/SDWebImage,Insfgg99x/SDWebImage,dreampiggy/SDWebImage,smule/SDWebImage,dreampiggy/SDWebImage,tualatrix/SDWebImage,dreampiggy/SDWebImage,rs/SDWebImage,dpettigrew/SDWebImage,awkward/SDWebImage,iheartradio/SDWebImage,awkward/SDWebImage,Kekanto/SDWebImage,awkward/SDWebImage