Fix #27014 -- infinite recursion using typing.py. (Merge 3.5 -> 3.6.)

diff --cc Misc/NEWS
index 8cd2d2d8e0d7a5a0c8c554ec853b75efde9124d4,8d91d7882a9afa33b7f07a747743f94d77f6b13b..11152361e003caad4201233243f83780ea60f96c
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -297,9 -122,9 +297,11 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #27014: Fix infinite recursion using typing.py.  Thanks to Kalle Tuure!
+ 
 +- Issue #27031: Removed dummy methods in Tkinter widget classes: tk_menuBar()
 +  and tk_bindForTraversal().
 +
  - Issue #14132: Fix urllib.request redirect handling when the target only has
    a query string.  Original fix by Ján Janech.