Index: Lib/tempfile.py
===================================================================
--- Lib/tempfile.py	(revision 74178)
+++ Lib/tempfile.py	(working copy)
@@ -568,11 +568,11 @@
 
     @property
     def mode(self):
-        return self._file.mode
+        return self._file.mode if self._rolled else None
 
     @property
     def name(self):
-        return self._file.name
+        return self._file.name if self._rolled else None
 
     @property
     def newlines(self):
Index: Lib/test/test_tempfile.py
===================================================================
--- Lib/test/test_tempfile.py	(revision 74178)
+++ Lib/test/test_tempfile.py	(working copy)
@@ -814,6 +814,11 @@
                 pass
         self.failUnlessRaises(ValueError, use_closed)
 
+    def test_properties(self):
+        # Don't throw AttributeError just because we haven't rolled yet
+        with tempfile.SpooledTemporaryFile(max_size=1) as f:
+            self.assertEqual(f.name, None)
+            self.assertEqual(f.mode, None)
 
 test_classes.append(test_SpooledTemporaryFile)