From 0519639d3348c7c13ef4be0ff81f7821c6c1a10b Mon Sep 17 00:00:00 2001
From: akshayaurora <akshayaurora@gmail.com>
Date: Sun, 20 Nov 2011 01:51:25 +0530
Subject: [PATCH] fix Async image crash when source is set to '' while
 loader.gif is animating

---
 kivy/uix/image.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kivy/uix/image.py b/kivy/uix/image.py
index e83761ce3..ce8531aac 100644
--- a/kivy/uix/image.py
+++ b/kivy/uix/image.py
@@ -237,6 +237,7 @@ class AsyncImage(Image):
 
     def on_source(self, instance, value):
         if not value:
+            self._coreimage.unbind(on_texture=self._on_tex_change)
             self.texture = None
             self._coreimage = None
         else:
@@ -258,4 +259,5 @@ class AsyncImage(Image):
         return proto in ('http', 'https', 'ftp')
 
     def _on_tex_change(self, *largs):
-        self.texture = self._coreimage.texture
+        if self._coreimage:
+            self.texture = self._coreimage.texture