Merge 22d3e6a into bdf56fa

python-pillow · Feb 23, 2016 · 51b7381 · 51b7381
2 parents bdf56fa + 22d3e6a
commit 51b7381
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/PIL/SpiderImagePlugin.py b/PIL/SpiderImagePlugin.py
@@ -173,7 +173,7 @@ def tell(self):
 
     def seek(self, frame):
         if self.istack == 0:
-            return
+            raise EOFError("attempt to seek in a non-stack file")
         if frame >= self._nimages:
             raise EOFError("attempt to seek past end of file")
         self.stkoffset = self.hdrlen + frame * (self.hdrlen + self.imgbytes)