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-rw-r--r--Doc/whatsnew/3.4.rst6
1 files changed, 5 insertions, 1 deletions
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index 26dc2fa..a2701a2 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -209,4 +209,8 @@ Porting to Python 3.4
This section lists previously described changes and other bugfixes
that may require changes to your code.
-* Nothing yet.
+* The ABCs defined in :mod:`importlib.abc` now either raise the appropriate
+ exception or return a default value instead of raising
+ :exc:`NotImplementedError` blindly. This will only affect code calling
+ :func:`super` and falling through all the way to the ABCs. For compatibility,
+ catch both :exc:`NotImplementedError` or the appropriate exception as needed.