Prevent crash on shutdown which can occur if we are finalizing
and the module dict has been cleared already and some object
raises a warning (like in a __del__).
Will backport.
diff --git a/Misc/NEWS b/Misc/NEWS
index f3749ab..b1a794b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
Core and builtins
-----------------
+- Prevent seg fault on shutdown which could occur if an object
+ raised a warning.
+
- Bug #1566280: Explicitly invoke threading._shutdown from Py_Main,
to avoid relying on atexit.