https://github.com/python/cpython/commit/52e73026282ecff5e58890cea356dff21ef8346a
commit: 52e73026282ecff5e58890cea356dff21ef8346a
branch: 3.15
author: Miss Islington (bot) <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2026-07-19T15:28:16Z
summary:

[3.15] gh-139806: Mention pickle error changes in What's New in 3.14 
(GH-154020) (GH-154161)

The gh-122311 changes made pickle.dump() and pickle.dumps() raise
PicklingError for some failures that previously raised AttributeError,
ImportError, ValueError or UnicodeEncodeError, depending on the
implementation.
Add an entry about this in the "Porting to Python 3.14" section.
(cherry picked from commit eb447081ed8182f825fa01953ec87cff41f3d585)

Co-authored-by: Serhiy Storchaka <[email protected]>
Co-authored-by: Claude Fable 5 <[email protected]>

files:
M Doc/whatsnew/3.14.rst

diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
index 0bb8858aea16fe..d3bc21e82eda40 100644
--- a/Doc/whatsnew/3.14.rst
+++ b/Doc/whatsnew/3.14.rst
@@ -3310,6 +3310,16 @@ Changes in the Python API
   This temporary change affects other threads.
   (Contributed by Serhiy Storchaka in :gh:`69998`.)
 
+* :func:`pickle.dump` and :func:`pickle.dumps` now raise
+  :exc:`~pickle.PicklingError` for some failures that previously raised
+  :exc:`AttributeError`, :exc:`ImportError`, :exc:`ValueError`,
+  :exc:`UnicodeEncodeError` or :exc:`!PicklingError`,
+  depending on the implementation
+  (for example, pickling a local object, or an object whose module cannot be 
imported).
+  The original exception is chained to the :exc:`!PicklingError`.
+  Code that caught these exceptions should also catch :exc:`!PicklingError`.
+  (Contributed by Serhiy Storchaka in :gh:`122311`.)
+
 * :class:`types.UnionType` is now an alias for :class:`typing.Union`,
   causing changes in some behaviors.
   See :ref:`above <whatsnew314-typing-union>` for more details.

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