From 3b039d5910df77722eab6e44c2a2e7fd8f81f0b2 Mon Sep 17 00:00:00 2001
From: sukeban <cmaxwell@slack-corp.com>
Date: Mon, 25 Jan 2016 14:21:17 -0800
Subject: [PATCH] Protect against malformed image
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Don’t add nil to the array, just skip the frame.
---
 SDWebImage/UIImage+GIF.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/SDWebImage/UIImage+GIF.m b/SDWebImage/UIImage+GIF.m
index e1ded2aa..e6d8577d 100755
--- a/SDWebImage/UIImage+GIF.m
+++ b/SDWebImage/UIImage+GIF.m
@@ -32,6 +32,8 @@
 
         for (size_t i = 0; i < count; i++) {
             CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);
+            if (!image)
+                continue;
 
             duration += [self sd_frameDurationAtIndex:i source:source];