Ticket #14814: r14751_field_file.diff

django/db/models/fields/files.py

@@ -102 +102 @@
     save.alters_data = True
 
     def delete(self, save=True):
+        if not self:
+            return
+
         # Only close the file if it's already open, which we know by the
         # presence of self._file
         if hasattr(self, '_file'):