Jul 1, 2025 · Jun 26, 2025 · Jun 27, 2025 · Jun 27, 2025 · Jun 27, 2025 · Jun 27, 2025
diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst

   * Creating a new Python thread.
   * :meth:`Joining <threading.Thread.join>` a running daemon thread.
   * :func:`os.fork`.
   * :func:`os.fork`,
   * acquiring a lock such as :cls:`threading.Lock`, when it is known that
     the operation would otherwise deadlock.

   See also the :func:`sys.is_finalizing` function.


      :meth:`threading.Thread.join` can now raise this exception.

   .. versionchanged:: next

      This exception may be raised when acquiring :meth:`threading.Lock`
      or :meth:`threading.RLock`.

 .. exception:: RecursionError

   This exception is derived from :exc:`RuntimeError`.  It is raised when the
diff --git a/Misc/NEWS.d/next/Library/2025-06-27-09-26-04.gh-issue-87135.33z0UW.rst b/Misc/NEWS.d/next/Library/2025-06-27-09-26-04.gh-issue-87135.33z0UW.rst
 Acquiring a :cls:`threading.Lock` or :cls:`threading.RLock` at interpreter
 shutdown will raise :exc:`PythonFinalizationError` if Python can determine
 that it would otherwise deadlock.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -429,7 +429,9 @@ The following exceptions are the exceptions that are usually raised.

		* Creating a new Python thread.
		* :meth:`Joining <threading.Thread.join>` a running daemon thread.
		* :func:`os.fork`.
		* :func:`os.fork`,
		* acquiring a lock such as :cls:`threading.Lock`, when it is known that
		the operation would otherwise deadlock.

		See also the :func:`sys.is_finalizing` function.

Expand All		@@ -440,6 +442,11 @@ The following exceptions are the exceptions that are usually raised.

		:meth:`threading.Thread.join` can now raise this exception.

		.. versionchanged:: next

		This exception may be raised when acquiring :meth:`threading.Lock`
		or :meth:`threading.RLock`.

		.. exception:: RecursionError

		This exception is derived from :exc:`RuntimeError`. It is raised when the
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		Acquiring a :cls:`threading.Lock` or :cls:`threading.RLock` at interpreter
		shutdown will raise :exc:`PythonFinalizationError` if Python can determine
		that it would otherwise deadlock.