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gh-74917: Raise TypeError in the JSON encoder if the default function returns the same type #113458

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gh-74917: Raise TypeError in the JSON encoder if the default function returns the same type #113458

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03beb5a
bpo-30732: json.dumps() lacks information about RecursionError relate…
svelankar Jul 25, 2017
4165b10
bpo-30732: json.dumps() lacks information about RecursionError relate…
svelankar Jul 30, 2017
31673b2
bpo-30732: json.dumps() lacks information about RecursionError relate…
svelankar Aug 1, 2017
6040758
bpo-30732: json.dumps() lacks information about RecursionError relate…
svelankar Aug 1, 2017
7c7c35a
Merge branch 'main' into bpo-30732
serhiy-storchaka Dec 24, 2023
0d72b0d
Add a test and Python implementation.
serhiy-storchaka Dec 24, 2023
8fcc89a
Improve the C implementation.
serhiy-storchaka Dec 24, 2023
4366dd6
Update docs.
serhiy-storchaka Dec 24, 2023
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Update docs.
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@serhiy-storchaka
serhiy-storchaka committed Dec 24, 2023
commit 4366dd62609ac0a4b0cb3f8ea121fedc45d6ee8d
4 changes: 4 additions & 0 deletions Doc/library/json.rst
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Expand Up @@ -486,6 +486,10 @@ Encoders and Decoders
.. versionchanged:: 3.6
All parameters are now :ref:`keyword-only <keyword-only_parameter>`.

.. versionchanged:: 3.13
:exc:`TypeError` is raised if the default serialization function
returns a result of the same type as the input.


.. method:: default(o)

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4 changes: 4 additions & 0 deletions Doc/whatsnew/3.13.rst
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Expand Up @@ -1163,6 +1163,10 @@ Changes in the Python API
other "private" attributes.
(See :gh:`112826`.)

* :exc:`TypeError` is now raised in the :mod:`json` encoder if the default
serialization function returns a result of the same type as the input.
(Contributed by Siddharth Velankar and Serhiy Storchaka in :gh:`74917`.)


Build Changes
=============
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2023-12-24-15-39-00.gh-issue-74917.48uE7k.rst
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@@ -0,0 +1,2 @@
:exc:`TypeError` is now raised in the :mod:`json` encoder if the default
serialization function returns a result of the same type as the input.