diff -r 1291649f38df Lib/tempfile.py
--- a/Lib/tempfile.py	Fri Mar 20 03:06:12 2015 +0100
+++ b/Lib/tempfile.py	Fri Mar 20 08:17:06 2015 +0200
@@ -428,7 +428,8 @@ class _TemporaryFileWrapper:
     def __iter__(self):
         # don't return iter(self.file), but yield from it to avoid closing
         # file as long as it's being used as iterator, see issue #23000
-        yield from iter(self.file)
+        for line in self.file:
+            yield line
 
 
 def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,