https://github.com/python/cpython/commit/43cd277ae924c6288eaa9998720c25cb2c26d694
commit: 43cd277ae924c6288eaa9998720c25cb2c26d694
branch: main
author: Hugo van Kemenade <[email protected]>
committer: hugovk <[email protected]>
date: 2026-01-13T12:26:56+02:00
summary:
Python 3.15.0a4
files:
A Misc/NEWS.d/3.15.0a4.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-10-11-17-01-21.gh-issue-139922.RUkXyd.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-11-06-05-21-25.gh-issue-100964.TxPf1b.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-13-01-11-03.gh-issue-142476.44Sp4N.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-24-24.gh-issue-134584.tJ1usH.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-52-37.gh-issue-134584.VsfOQR.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-11-56-20.gh-issue-142766.Uy2HTm.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-20-38-17.gh-issue-142448.mAFqwL.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-23-26-41.gh-issue-142543.wJKjBs.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-10-49-03.gh-issue-129068.GlYnrO.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-20-31-09.gh-issue-139757.6DWxeQ.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-18-01-00-14.gh-issue-142776.ACaoeP.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-19-00-59-29.gh-issue-142961.q8WRSq.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-21-00-25-26.gh-issue-139109.gwSsOL.rst
D
Misc/NEWS.d/next/Core_and_Builtins/2025-12-22-12-03-09.gh-issue-143057.Majsre.rst
D Misc/NEWS.d/next/Library/2025-07-05-08-30-07.gh-issue-136282.K3JKyD.rst
D Misc/NEWS.d/next/Library/2025-07-20-15-39-54.gh-issue-124098.znFPIp.rst
D Misc/NEWS.d/next/Library/2025-10-12-12-05-52.gh-issue-139971.UdoStU.rst
D Misc/NEWS.d/next/Library/2025-12-10-02-31-43.gh-issue-142419.C8_LES.rst
D Misc/NEWS.d/next/Library/2025-12-11-22-59-33.gh-issue-142560.GkJrkk.rst
D Misc/NEWS.d/next/Library/2025-12-13-10-34-59.gh-issue-142654.fmm974.rst
D Misc/NEWS.d/next/Library/2025-12-13-23-26-42.gh-issue-142495.I88Uv_.rst
D Misc/NEWS.d/next/Library/2025-12-15-02-00-31.gh-issue-138122.m3EF9E.rst
D Misc/NEWS.d/next/Library/2025-12-16-04-39-27.gh-issue-142784.HBGJag.rst
D Misc/NEWS.d/next/Library/2025-12-16-14-21-20.gh-issue-76007.O4AmYl.rst
D Misc/NEWS.d/next/Library/2025-12-16-14-49-19.gh-issue-142783.VPV1ig.rst
D Misc/NEWS.d/next/Library/2025-12-16-15-32-41.gh-issue-142834.g7mHw_.rst
D Misc/NEWS.d/next/Library/2025-12-17-03-03-12.gh-issue-138122.m3EF9E.rst
D Misc/NEWS.d/next/Library/2025-12-17-14-41-09.gh-issue-112127.13OHQk.rst
D Misc/NEWS.d/next/Library/2025-12-20-01-49-02.gh-issue-143010._-SWX0.rst
D Misc/NEWS.d/next/Library/2025-12-20-02-33-05.gh-issue-138122.m3EF9E.rst
D Misc/NEWS.d/next/Library/2025-12-20-16-35-42.gh-issue-80744.X4pZ2N.rst
D Misc/NEWS.d/next/Library/2025-12-21-17-44-28.gh-issue-143046.GBa5Ip.rst
D Misc/NEWS.d/next/Library/2025-12-22-22-36-21.gh-issue-122431.9E3085.rst
D Misc/NEWS.d/next/Tests/2025-12-17-02-02-57.gh-issue-142836.mR-fvK.rst
M Doc/library/mmap.rst
M Include/patchlevel.h
M Lib/pydoc_data/topics.py
M README.rst
diff --git a/Doc/library/mmap.rst b/Doc/library/mmap.rst
index 41b90f2c3b3111..cd5f960a08a489 100644
--- a/Doc/library/mmap.rst
+++ b/Doc/library/mmap.rst
@@ -337,7 +337,7 @@ To map anonymous memory, -1 should be passed as the fileno
along with the length
.. availability:: Linux >= 5.17 (kernel built with
``CONFIG_ANON_VMA_NAME`` option)
- .. versionadded:: next
+ .. versionadded:: 3.15
.. method:: size()
diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index 90a73c8f2b1ecc..eb0875c908a9d8 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h
@@ -24,10 +24,10 @@
#define PY_MINOR_VERSION 15
#define PY_MICRO_VERSION 0
#define PY_RELEASE_LEVEL PY_RELEASE_LEVEL_ALPHA
-#define PY_RELEASE_SERIAL 3
+#define PY_RELEASE_SERIAL 4
/* Version as a string */
-#define PY_VERSION "3.15.0a3+"
+#define PY_VERSION "3.15.0a4"
/*--end constants--*/
diff --git a/Lib/pydoc_data/topics.py b/Lib/pydoc_data/topics.py
index 2f19e84d2e47e5..c290f950100a7d 100644
--- a/Lib/pydoc_data/topics.py
+++ b/Lib/pydoc_data/topics.py
@@ -1,4 +1,4 @@
-# Autogenerated by Sphinx on Tue Dec 16 14:26:04 2025
+# Autogenerated by Sphinx on Tue Jan 13 12:26:49 2026
# as part of the release process.
topics = {
@@ -888,8 +888,8 @@ class to a new value, *value*.
created for each of the iterator’s values. However, the *__slots__*
attribute will be an empty iterator.
-Changed in version 3.15.0a2 (unreleased): Allowed defining the
-*__dict__* and *__weakref__* *__slots__* for any class.
+Changed in version 3.15: Allowed defining the *__dict__* and
+*__weakref__* *__slots__* for any class.
''',
'attribute-references': r'''Attribute references
********************
@@ -4563,8 +4563,8 @@ class pdb.Pdb(completekey='tab', stdin=None, stdout=None,
skip=None, nosigint=Fa
To remove all commands from a breakpoint, type "commands" and
follow it immediately with "end"; that is, give no commands.
- With no *bpnumber* argument, "commands" refers to the last
- breakpoint set.
+ With no *bpnumber* argument, "commands" refers to the most recently
+ set breakpoint that still exists.
You can use breakpoint commands to start your program up again.
Simply use the "continue" command, or "step", or any other command
@@ -9032,8 +9032,8 @@ class to a new value, *value*.
created for each of the iterator’s values. However, the *__slots__*
attribute will be an empty iterator.
-Changed in version 3.15.0a2 (unreleased): Allowed defining the
-*__dict__* and *__weakref__* *__slots__* for any class.
+Changed in version 3.15: Allowed defining the *__dict__* and
+*__weakref__* *__slots__* for any class.
Customizing class creation
@@ -11466,8 +11466,11 @@ class is used in a class pattern with positional
arguments, each
By default, an object is considered true unless its class defines
either a "__bool__()" method that returns "False" or a "__len__()"
-method that returns zero, when called with the object. [1] Here are
-most of the built-in objects considered false:
+method that returns zero, when called with the object. [1] If one of
+the methods raises an exception when called, the exception is
+propagated and the object does not have a truth value (for example,
+"NotImplemented"). Here are most of the built-in objects considered
+false:
* constants defined to be false: "None" and "False"
diff --git a/Misc/NEWS.d/3.15.0a4.rst b/Misc/NEWS.d/3.15.0a4.rst
new file mode 100644
index 00000000000000..408f76cab411e3
--- /dev/null
+++ b/Misc/NEWS.d/3.15.0a4.rst
@@ -0,0 +1,351 @@
+.. date: 2025-12-17-02-02-57
+.. gh-issue: 142836
+.. nonce: mR-fvK
+.. release date: 2026-01-13
+.. section: Tests
+
+Accommodated Solaris in ``test_pdb.test_script_target_anonymous_pipe``.
+
+..
+
+.. date: 2025-12-22-22-36-21
+.. gh-issue: 122431
+.. nonce: 9E3085
+.. section: Library
+
+Corrected the error message in :func:`readline.append_history_file` to state
+that ``nelements`` must be non-negative instead of positive.
+
+..
+
+.. date: 2025-12-21-17-44-28
+.. gh-issue: 143046
+.. nonce: GBa5Ip
+.. section: Library
+
+The :mod:`asyncio` REPL no longer prints copyright and version messages in
+the quiet mode (:option:`-q`). Patch by Bartosz Sławecki.
+
+..
+
+.. date: 2025-12-20-16-35-42
+.. gh-issue: 80744
+.. nonce: X4pZ2N
+.. section: Library
+
+Fix issue where ``pdb`` would read a ``.pdbrc`` twice if launched from the
+home directory
+
+..
+
+.. date: 2025-12-20-02-33-05
+.. gh-issue: 138122
+.. nonce: m3EF9E
+.. section: Library
+
+Add blocking mode to Tachyon for accurate stack traces in applications with
+many generators or fast-changing call stacks. Patch by Pablo Galindo.
+
+..
+
+.. date: 2025-12-20-01-49-02
+.. gh-issue: 143010
+.. nonce: _-SWX0
+.. section: Library
+
+Fixed a bug in :mod:`mailbox` where the precise timing of an external event
+could result in the library opening an existing file instead of a file it
+expected to create.
+
+..
+
+.. date: 2025-12-17-14-41-09
+.. gh-issue: 112127
+.. nonce: 13OHQk
+.. section: Library
+
+Fix possible use-after-free in :func:`atexit.unregister` when the callback
+is unregistered during comparison.
+
+..
+
+.. date: 2025-12-17-03-03-12
+.. gh-issue: 138122
+.. nonce: m3EF9E
+.. section: Library
+
+Fix incomplete stack traces in the Tachyon profiler's frame cache when
+profiling code with deeply nested generators. The frame cache now validates
+that stack traces reach the base frame before caching, preventing broken
+flamegraphs. Patch by Pablo Galindo.
+
+..
+
+.. date: 2025-12-16-15-32-41
+.. gh-issue: 142834
+.. nonce: g7mHw_
+.. section: Library
+
+Change the :mod:`pdb` ``commands`` command to use the last available
+breakpoint instead of failing when the most recently created breakpoint was
+deleted.
+
+..
+
+.. date: 2025-12-16-14-49-19
+.. gh-issue: 142783
+.. nonce: VPV1ig
+.. section: Library
+
+Fix zoneinfo use-after-free with descriptor _weak_cache. a descriptor as
+_weak_cache could cause crashes during object creation. The fix ensures
+proper reference counting for descriptor-provided objects.
+
+..
+
+.. date: 2025-12-16-14-21-20
+.. gh-issue: 76007
+.. nonce: O4AmYl
+.. section: Library
+
+Deprecate ``VERSION`` from :mod:`xml.etree.ElementTree` and ``version`` from
+:mod:`!xml.sax.expatreader` and :mod:`xml.sax.handler`. Patch by Hugo van
+Kemenade.
+
+..
+
+.. date: 2025-12-16-04-39-27
+.. gh-issue: 142784
+.. nonce: HBGJag
+.. section: Library
+
+The :mod:`asyncio` REPL now properly closes the loop upon the end of
+interactive session. Previously, it could cause surprising warnings.
+Contributed by Bartosz Sławecki.
+
+..
+
+.. date: 2025-12-15-02-00-31
+.. gh-issue: 138122
+.. nonce: m3EF9E
+.. section: Library
+
+Add binary output format to :mod:`profiling.sampling` for compact storage of
+profiling data. The new ``--binary`` option captures samples to a file that
+can be converted to other formats using the ``replay`` command. Patch by
+Pablo Galindo
+
+..
+
+.. date: 2025-12-13-23-26-42
+.. gh-issue: 142495
+.. nonce: I88Uv_
+.. section: Library
+
+:class:`collections.defaultdict` now prioritizes :meth:`~object.__setitem__`
+when inserting default values from ``default_factory``. This prevents race
+conditions where a default value would overwrite a value set before
+``default_factory`` returns.
+
+..
+
+.. date: 2025-12-13-10-34-59
+.. gh-issue: 142654
+.. nonce: fmm974
+.. section: Library
+
+Show the clearer error message when using ``profiling.sampling`` on an
+unknown PID.
+
+..
+
+.. date: 2025-12-11-22-59-33
+.. gh-issue: 142560
+.. nonce: GkJrkk
+.. section: Library
+
+Fix use-after-free in :class:`bytearray` search-like methods
+(:meth:`~bytearray.find`, :meth:`~bytearray.count`,
+:meth:`~bytearray.index`, :meth:`~bytearray.rindex`, and
+:meth:`~bytearray.rfind`) by marking the storage as exported which causes
+reallocation attempts to raise :exc:`BufferError`. For
+:func:`~operator.contains`, :meth:`~bytearray.split`, and
+:meth:`~bytearray.rsplit` the :ref:`buffer protocol <bufferobjects>` is used
+for this.
+
+..
+
+.. date: 2025-12-10-02-31-43
+.. gh-issue: 142419
+.. nonce: C8_LES
+.. section: Library
+
+:meth:`mmap.mmap.set_name` method added to annotate an anonymous memory map
+if Linux kernel supports ``PR_SET_VMA_ANON_NAME`` (Linux 5.17 or newer).
+Patch by Donghee Na.
+
+..
+
+.. date: 2025-10-12-12-05-52
+.. gh-issue: 139971
+.. nonce: UdoStU
+.. section: Library
+
+:mod:`pydoc`: Ensure that the link to the online documentation of a
+:term:`stdlib` module is correct.
+
+..
+
+.. date: 2025-07-20-15-39-54
+.. gh-issue: 124098
+.. nonce: znFPIp
+.. section: Library
+
+Fix issue where methods in handlers that lacked the protocol name but
+matched a valid base handler method (e.g., ``_open()`` or ``error()``) were
+incorrectly added to :class:`urllib.request.OpenerDirector`'s handlers.
+Contributed by Andrea Mattei.
+
+..
+
+.. date: 2025-07-05-08-30-07
+.. gh-issue: 136282
+.. nonce: K3JKyD
+.. section: Library
+
+Add support for :const:`~configparser.UNNAMED_SECTION` when creating a
+section via the mapping protocol access
+
+..
+
+.. date: 2025-12-22-12-03-09
+.. gh-issue: 143057
+.. nonce: Majsre
+.. section: Core and Builtins
+
+Avoid locking in :c:func:`PyTraceMalloc_Track` and
+:c:func:`PyTraceMalloc_Untrack` when :mod:`tracemalloc` is not enabled.
+
+..
+
+.. date: 2025-12-21-00-25-26
+.. gh-issue: 139109
+.. nonce: gwSsOL
+.. section: Core and Builtins
+
+Add missing terminator in certain cases when tracing in the new JIT
+compiler.
+
+..
+
+.. date: 2025-12-19-00-59-29
+.. gh-issue: 142961
+.. nonce: q8WRSq
+.. section: Core and Builtins
+
+Fix a segfault in the JIT when constant folding ``len(tuple)``.
+
+..
+
+.. date: 2025-12-18-01-00-14
+.. gh-issue: 142776
+.. nonce: ACaoeP
+.. section: Core and Builtins
+
+Fix a file descriptor leak in import.c
+
+..
+
+.. date: 2025-12-17-20-31-09
+.. gh-issue: 139757
+.. nonce: 6DWxeQ
+.. section: Core and Builtins
+
+Fix building JIT stencils on free-threaded builds.
+
+..
+
+.. date: 2025-12-17-10-49-03
+.. gh-issue: 129068
+.. nonce: GlYnrO
+.. section: Core and Builtins
+
+Make concurrent iteration over the same range iterator thread-safe in the
+free threading build.
+
+..
+
+.. date: 2025-12-16-23-26-41
+.. gh-issue: 142543
+.. nonce: wJKjBs
+.. section: Core and Builtins
+
+Fix a stack overflow on Clang JIT build configurations with full LTO.
+
+..
+
+.. date: 2025-12-16-20-38-17
+.. gh-issue: 142448
+.. nonce: mAFqwL
+.. section: Core and Builtins
+
+Fix a bug when using monitoring with the JIT.
+
+..
+
+.. date: 2025-12-16-11-56-20
+.. gh-issue: 142766
+.. nonce: Uy2HTm
+.. section: Core and Builtins
+
+Clear the frame of a generator when :meth:`generator.close` is called.
+
+..
+
+.. date: 2025-12-16-05-52-37
+.. gh-issue: 134584
+.. nonce: VsfOQR
+.. section: Core and Builtins
+
+Eliminate redundant refcounting from ``_LOAD_ATTR_INSTANCE_VALUE``.
+
+..
+
+.. date: 2025-12-16-05-24-24
+.. gh-issue: 134584
+.. nonce: tJ1usH
+.. section: Core and Builtins
+
+Eliminate redundant refcounting from ``_STORE_ATTR_WITH_HINT``.
+
+..
+
+.. date: 2025-12-13-01-11-03
+.. gh-issue: 142476
+.. nonce: 44Sp4N
+.. section: Core and Builtins
+
+Fix a memory leak in the experimental Tier 2 optimizer when creating
+executors. Patched by Shamil Abdulaev.
+
+..
+
+.. date: 2025-11-06-05-21-25
+.. gh-issue: 100964
+.. nonce: TxPf1b
+.. section: Core and Builtins
+
+Fix reference cycle in exhausted generator frames. Patch by Savannah
+Ostrowski.
+
+..
+
+.. date: 2025-10-11-17-01-21
+.. gh-issue: 139922
+.. nonce: RUkXyd
+.. section: Core and Builtins
+
+Allow building CPython with the tail calling interpreter on Visual Studio
+2026 MSVC. This provides a performance gain over the prior interpreter for
+MSVC. Patch by Ken Jin, Brandt Bucher, and Chris Eibl. With help from the
+MSVC team including Hulon Jenkins.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-11-17-01-21.gh-issue-139922.RUkXyd.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-11-17-01-21.gh-issue-139922.RUkXyd.rst
deleted file mode 100644
index d498db07f91454..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-11-17-01-21.gh-issue-139922.RUkXyd.rst
+++ /dev/null
@@ -1 +0,0 @@
-Allow building CPython with the tail calling interpreter on Visual Studio 2026
MSVC. This provides a performance gain over the prior interpreter for MSVC.
Patch by Ken Jin, Brandt Bucher, and Chris Eibl. With help from the MSVC team
including Hulon Jenkins.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-11-06-05-21-25.gh-issue-100964.TxPf1b.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-11-06-05-21-25.gh-issue-100964.TxPf1b.rst
deleted file mode 100644
index 7c554cf8dda5d1..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-11-06-05-21-25.gh-issue-100964.TxPf1b.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix reference cycle in exhausted generator frames. Patch by Savannah Ostrowski.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-13-01-11-03.gh-issue-142476.44Sp4N.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-13-01-11-03.gh-issue-142476.44Sp4N.rst
deleted file mode 100644
index eae1f3a1ce53b6..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-13-01-11-03.gh-issue-142476.44Sp4N.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Fix a memory leak in the experimental Tier 2 optimizer when creating
-executors. Patched by Shamil Abdulaev.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-24-24.gh-issue-134584.tJ1usH.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-24-24.gh-issue-134584.tJ1usH.rst
deleted file mode 100644
index aa096fc827dbc4..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-24-24.gh-issue-134584.tJ1usH.rst
+++ /dev/null
@@ -1 +0,0 @@
-Eliminate redundant refcounting from ``_STORE_ATTR_WITH_HINT``.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-52-37.gh-issue-134584.VsfOQR.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-52-37.gh-issue-134584.VsfOQR.rst
deleted file mode 100644
index d92f2c166c56a4..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-05-52-37.gh-issue-134584.VsfOQR.rst
+++ /dev/null
@@ -1 +0,0 @@
-Eliminate redundant refcounting from ``_LOAD_ATTR_INSTANCE_VALUE``.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-11-56-20.gh-issue-142766.Uy2HTm.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-11-56-20.gh-issue-142766.Uy2HTm.rst
deleted file mode 100644
index 6a14976a6dcf94..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-11-56-20.gh-issue-142766.Uy2HTm.rst
+++ /dev/null
@@ -1 +0,0 @@
-Clear the frame of a generator when :meth:`generator.close` is called.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-20-38-17.gh-issue-142448.mAFqwL.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-20-38-17.gh-issue-142448.mAFqwL.rst
deleted file mode 100644
index bcc7c1fb12d094..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-20-38-17.gh-issue-142448.mAFqwL.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix a bug when using monitoring with the JIT.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-23-26-41.gh-issue-142543.wJKjBs.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-23-26-41.gh-issue-142543.wJKjBs.rst
deleted file mode 100644
index 0897127fec747e..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-16-23-26-41.gh-issue-142543.wJKjBs.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix a stack overflow on Clang JIT build configurations with full LTO.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-10-49-03.gh-issue-129068.GlYnrO.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-10-49-03.gh-issue-129068.GlYnrO.rst
deleted file mode 100644
index 16b19524cd4057..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-10-49-03.gh-issue-129068.GlYnrO.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Make concurrent iteration over the same range iterator thread-safe in the
-free threading build.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-20-31-09.gh-issue-139757.6DWxeQ.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-20-31-09.gh-issue-139757.6DWxeQ.rst
deleted file mode 100644
index 3c476d3eaea574..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-17-20-31-09.gh-issue-139757.6DWxeQ.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix building JIT stencils on free-threaded builds.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-18-01-00-14.gh-issue-142776.ACaoeP.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-18-01-00-14.gh-issue-142776.ACaoeP.rst
deleted file mode 100644
index 3039b04d89cb88..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-18-01-00-14.gh-issue-142776.ACaoeP.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix a file descriptor leak in import.c
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-19-00-59-29.gh-issue-142961.q8WRSq.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-19-00-59-29.gh-issue-142961.q8WRSq.rst
deleted file mode 100644
index 4b75ab232d50e4..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-19-00-59-29.gh-issue-142961.q8WRSq.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix a segfault in the JIT when constant folding ``len(tuple)``.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-21-00-25-26.gh-issue-139109.gwSsOL.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-21-00-25-26.gh-issue-139109.gwSsOL.rst
deleted file mode 100644
index 17cceac4e09057..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-21-00-25-26.gh-issue-139109.gwSsOL.rst
+++ /dev/null
@@ -1 +0,0 @@
-Add missing terminator in certain cases when tracing in the new JIT compiler.
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-22-12-03-09.gh-issue-143057.Majsre.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-22-12-03-09.gh-issue-143057.Majsre.rst
deleted file mode 100644
index 2eac8c1cfdc10c..00000000000000
---
a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-22-12-03-09.gh-issue-143057.Majsre.rst
+++ /dev/null
@@ -1 +0,0 @@
-Avoid locking in :c:func:`PyTraceMalloc_Track` and
:c:func:`PyTraceMalloc_Untrack` when :mod:`tracemalloc` is not enabled.
diff --git
a/Misc/NEWS.d/next/Library/2025-07-05-08-30-07.gh-issue-136282.K3JKyD.rst
b/Misc/NEWS.d/next/Library/2025-07-05-08-30-07.gh-issue-136282.K3JKyD.rst
deleted file mode 100644
index b5589b47716c70..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-07-05-08-30-07.gh-issue-136282.K3JKyD.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Add support for :const:`~configparser.UNNAMED_SECTION` when creating a
-section via the mapping protocol access
diff --git
a/Misc/NEWS.d/next/Library/2025-07-20-15-39-54.gh-issue-124098.znFPIp.rst
b/Misc/NEWS.d/next/Library/2025-07-20-15-39-54.gh-issue-124098.znFPIp.rst
deleted file mode 100644
index 236b37d268ef2d..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-07-20-15-39-54.gh-issue-124098.znFPIp.rst
+++ /dev/null
@@ -1,4 +0,0 @@
-Fix issue where methods in handlers that lacked the protocol name but
-matched a valid base handler method (e.g., ``_open()`` or ``error()``)
-were incorrectly added to :class:`urllib.request.OpenerDirector`'s
-handlers. Contributed by Andrea Mattei.
diff --git
a/Misc/NEWS.d/next/Library/2025-10-12-12-05-52.gh-issue-139971.UdoStU.rst
b/Misc/NEWS.d/next/Library/2025-10-12-12-05-52.gh-issue-139971.UdoStU.rst
deleted file mode 100644
index 720397e2729c0a..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-10-12-12-05-52.gh-issue-139971.UdoStU.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-:mod:`pydoc`: Ensure that the link to the online documentation of a
-:term:`stdlib` module is correct.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-10-02-31-43.gh-issue-142419.C8_LES.rst
b/Misc/NEWS.d/next/Library/2025-12-10-02-31-43.gh-issue-142419.C8_LES.rst
deleted file mode 100644
index 63955923cd157c..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-10-02-31-43.gh-issue-142419.C8_LES.rst
+++ /dev/null
@@ -1,3 +0,0 @@
-:meth:`mmap.mmap.set_name` method added to annotate an anonymous memory map
-if Linux kernel supports ``PR_SET_VMA_ANON_NAME`` (Linux 5.17 or newer).
-Patch by Donghee Na.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-11-22-59-33.gh-issue-142560.GkJrkk.rst
b/Misc/NEWS.d/next/Library/2025-12-11-22-59-33.gh-issue-142560.GkJrkk.rst
deleted file mode 100644
index 9c0657214b0751..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-11-22-59-33.gh-issue-142560.GkJrkk.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix use-after-free in :class:`bytearray` search-like methods
(:meth:`~bytearray.find`, :meth:`~bytearray.count`, :meth:`~bytearray.index`,
:meth:`~bytearray.rindex`, and :meth:`~bytearray.rfind`) by marking the storage
as exported which causes reallocation attempts to raise :exc:`BufferError`. For
:func:`~operator.contains`, :meth:`~bytearray.split`, and
:meth:`~bytearray.rsplit` the :ref:`buffer protocol <bufferobjects>` is used
for this.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-13-10-34-59.gh-issue-142654.fmm974.rst
b/Misc/NEWS.d/next/Library/2025-12-13-10-34-59.gh-issue-142654.fmm974.rst
deleted file mode 100644
index 7bb14cb499d850..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-13-10-34-59.gh-issue-142654.fmm974.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Show the clearer error message when using ``profiling.sampling`` on an
-unknown PID.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-13-23-26-42.gh-issue-142495.I88Uv_.rst
b/Misc/NEWS.d/next/Library/2025-12-13-23-26-42.gh-issue-142495.I88Uv_.rst
deleted file mode 100644
index 3e1a624fe56473..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-13-23-26-42.gh-issue-142495.I88Uv_.rst
+++ /dev/null
@@ -1,4 +0,0 @@
-:class:`collections.defaultdict` now prioritizes :meth:`~object.__setitem__`
-when inserting default values from ``default_factory``. This prevents race
-conditions where a default value would overwrite a value set before
-``default_factory`` returns.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-15-02-00-31.gh-issue-138122.m3EF9E.rst
b/Misc/NEWS.d/next/Library/2025-12-15-02-00-31.gh-issue-138122.m3EF9E.rst
deleted file mode 100644
index f9c2cee51d1dcd..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-15-02-00-31.gh-issue-138122.m3EF9E.rst
+++ /dev/null
@@ -1,4 +0,0 @@
-Add binary output format to :mod:`profiling.sampling` for compact storage of
-profiling data. The new ``--binary`` option captures samples to a file that
-can be converted to other formats using the ``replay`` command. Patch by
-Pablo Galindo
diff --git
a/Misc/NEWS.d/next/Library/2025-12-16-04-39-27.gh-issue-142784.HBGJag.rst
b/Misc/NEWS.d/next/Library/2025-12-16-04-39-27.gh-issue-142784.HBGJag.rst
deleted file mode 100644
index 92a723cbc29739..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-16-04-39-27.gh-issue-142784.HBGJag.rst
+++ /dev/null
@@ -1,3 +0,0 @@
-The :mod:`asyncio` REPL now properly closes the loop upon the end of
interactive session.
-Previously, it could cause surprising warnings.
-Contributed by Bartosz Sławecki.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-16-14-21-20.gh-issue-76007.O4AmYl.rst
b/Misc/NEWS.d/next/Library/2025-12-16-14-21-20.gh-issue-76007.O4AmYl.rst
deleted file mode 100644
index cfda7327e8fee8..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-16-14-21-20.gh-issue-76007.O4AmYl.rst
+++ /dev/null
@@ -1,3 +0,0 @@
-Deprecate ``VERSION`` from :mod:`xml.etree.ElementTree` and ``version`` from
-:mod:`!xml.sax.expatreader` and :mod:`xml.sax.handler`. Patch by Hugo van
-Kemenade.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-16-14-49-19.gh-issue-142783.VPV1ig.rst
b/Misc/NEWS.d/next/Library/2025-12-16-14-49-19.gh-issue-142783.VPV1ig.rst
deleted file mode 100644
index f014771ae9a146..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-16-14-49-19.gh-issue-142783.VPV1ig.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix zoneinfo use-after-free with descriptor _weak_cache. a descriptor as
_weak_cache could cause crashes during object creation. The fix ensures proper
reference counting for descriptor-provided objects.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-16-15-32-41.gh-issue-142834.g7mHw_.rst
b/Misc/NEWS.d/next/Library/2025-12-16-15-32-41.gh-issue-142834.g7mHw_.rst
deleted file mode 100644
index 8cde592e7c937d..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-16-15-32-41.gh-issue-142834.g7mHw_.rst
+++ /dev/null
@@ -1 +0,0 @@
-Change the :mod:`pdb` ``commands`` command to use the last available
breakpoint instead of failing when the most recently created breakpoint was
deleted.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-17-03-03-12.gh-issue-138122.m3EF9E.rst
b/Misc/NEWS.d/next/Library/2025-12-17-03-03-12.gh-issue-138122.m3EF9E.rst
deleted file mode 100644
index e33a761aa61825..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-17-03-03-12.gh-issue-138122.m3EF9E.rst
+++ /dev/null
@@ -1,4 +0,0 @@
-Fix incomplete stack traces in the Tachyon profiler's frame cache when
-profiling code with deeply nested generators. The frame cache now validates
-that stack traces reach the base frame before caching, preventing broken
-flamegraphs. Patch by Pablo Galindo.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-17-14-41-09.gh-issue-112127.13OHQk.rst
b/Misc/NEWS.d/next/Library/2025-12-17-14-41-09.gh-issue-112127.13OHQk.rst
deleted file mode 100644
index c983683ebd5589..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-17-14-41-09.gh-issue-112127.13OHQk.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Fix possible use-after-free in :func:`atexit.unregister` when the callback
-is unregistered during comparison.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-20-01-49-02.gh-issue-143010._-SWX0.rst
b/Misc/NEWS.d/next/Library/2025-12-20-01-49-02.gh-issue-143010._-SWX0.rst
deleted file mode 100644
index 4914d0b7be727b..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-20-01-49-02.gh-issue-143010._-SWX0.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fixed a bug in :mod:`mailbox` where the precise timing of an external event
could result in the library opening an existing file instead of a file it
expected to create.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-20-02-33-05.gh-issue-138122.m3EF9E.rst
b/Misc/NEWS.d/next/Library/2025-12-20-02-33-05.gh-issue-138122.m3EF9E.rst
deleted file mode 100644
index a5785a88b0f433..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-20-02-33-05.gh-issue-138122.m3EF9E.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Add blocking mode to Tachyon for accurate stack traces in applications with
-many generators or fast-changing call stacks. Patch by Pablo Galindo.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-20-16-35-42.gh-issue-80744.X4pZ2N.rst
b/Misc/NEWS.d/next/Library/2025-12-20-16-35-42.gh-issue-80744.X4pZ2N.rst
deleted file mode 100644
index 03ec9e4652b8cc..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-20-16-35-42.gh-issue-80744.X4pZ2N.rst
+++ /dev/null
@@ -1 +0,0 @@
-Fix issue where ``pdb`` would read a ``.pdbrc`` twice if launched from the
home directory
diff --git
a/Misc/NEWS.d/next/Library/2025-12-21-17-44-28.gh-issue-143046.GBa5Ip.rst
b/Misc/NEWS.d/next/Library/2025-12-21-17-44-28.gh-issue-143046.GBa5Ip.rst
deleted file mode 100644
index ac819a47f4cde9..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-21-17-44-28.gh-issue-143046.GBa5Ip.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-The :mod:`asyncio` REPL no longer prints copyright and version messages in
-the quiet mode (:option:`-q`). Patch by Bartosz Sławecki.
diff --git
a/Misc/NEWS.d/next/Library/2025-12-22-22-36-21.gh-issue-122431.9E3085.rst
b/Misc/NEWS.d/next/Library/2025-12-22-22-36-21.gh-issue-122431.9E3085.rst
deleted file mode 100644
index 8936ac9395f743..00000000000000
--- a/Misc/NEWS.d/next/Library/2025-12-22-22-36-21.gh-issue-122431.9E3085.rst
+++ /dev/null
@@ -1 +0,0 @@
-Corrected the error message in :func:`readline.append_history_file` to state
that ``nelements`` must be non-negative instead of positive.
diff --git
a/Misc/NEWS.d/next/Tests/2025-12-17-02-02-57.gh-issue-142836.mR-fvK.rst
b/Misc/NEWS.d/next/Tests/2025-12-17-02-02-57.gh-issue-142836.mR-fvK.rst
deleted file mode 100644
index dd84ce9839ffa9..00000000000000
--- a/Misc/NEWS.d/next/Tests/2025-12-17-02-02-57.gh-issue-142836.mR-fvK.rst
+++ /dev/null
@@ -1 +0,0 @@
-Accommodated Solaris in ``test_pdb.test_script_target_anonymous_pipe``.
diff --git a/README.rst b/README.rst
index 5f451c6876ccfe..e9bf44ad14fb79 100644
--- a/README.rst
+++ b/README.rst
@@ -1,4 +1,4 @@
-This is Python version 3.15.0 alpha 3
+This is Python version 3.15.0 alpha 4
=====================================
.. image::
https://github.com/python/cpython/actions/workflows/build.yml/badge.svg?branch=main&event=push
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