From 3ebc0f2455b095d452a36f3d44fcfb87627db121 Mon Sep 17 00:00:00 2001
From: Eric Soroos <eric-github@soroos.net>
Date: Wed, 3 Jan 2018 10:56:17 +0000
Subject: [PATCH] Don't reassign crc on close

---
 src/PIL/PngImagePlugin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/PIL/PngImagePlugin.py b/src/PIL/PngImagePlugin.py
index 51e5ad768..2da44140c 100644
--- a/src/PIL/PngImagePlugin.py
+++ b/src/PIL/PngImagePlugin.py
@@ -121,7 +121,7 @@ class ChunkStream(object):
         self.close()
 
     def close(self):
-        self.queue = self.crc = self.fp = None
+        self.queue = self.fp = None
 
     def push(self, cid, pos, length):