From d85f94da9674c85db89e9b87898d2041a8840b66 Mon Sep 17 00:00:00 2001
From: Gondnat <julykitt@gmail.com>
Date: Fri, 29 Mar 2019 14:16:36 +0800
Subject: [PATCH] Fix a crash, when SDAnimatedImageView dealloc,
 displayLinkContext in block will be a bad pointer

---
 SDWebImage/SDAnimatedImageView.m | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/SDWebImage/SDAnimatedImageView.m b/SDWebImage/SDAnimatedImageView.m
index 42c731d2..fc4a9988 100644
--- a/SDWebImage/SDAnimatedImageView.m
+++ b/SDWebImage/SDAnimatedImageView.m
@@ -742,8 +742,10 @@ static CVReturn renderCallback(CVDisplayLinkRef displayLink, const CVTimeStamp *
     // Calculate refresh duration
     NSTimeInterval duration = (double)inOutputTime->videoRefreshPeriod / ((double)inOutputTime->videoTimeScale * inOutputTime->rateScalar);
     // CVDisplayLink callback is not on main queue
+    SDAnimatedImageView *imageView = (__bridge SDAnimatedImageView *)displayLinkContext;
+    __weak SDAnimatedImageView *weakImageView = imageView;
     dispatch_async(dispatch_get_main_queue(), ^{
-        [(__bridge SDAnimatedImageView *)displayLinkContext displayDidRefresh:displayLink duration:duration];
+        [weakImageView displayDidRefresh:displayLink duration:duration];
     });
     return kCVReturnSuccess;
 }