Import upstream CPython branch '3.14'

Summary:
Python `3.14.0rc1+` (`3.14`) was **published** on 2025-07-31 04:07:44+00:00.

# Commit Info

Base: (`3.14.0rc1+`) - `38a42fe32c9cdca6e17026bba18c6eb711325f75` (commit date: 2025-07-29 20:10:39+00:00)

Imported: (`3.14.0rc1+`) - `3.14` (commit date: 2025-07-31 04:07:44+00:00)

# Files added

```javascript
Lib/test/test_free_threading/test_bisect.py
```

Reviewed By: itamaro

Differential Revision: D79341181

fbshipit-source-id: e531e9a979bed758ed21a5215c086da1a40b8421

Author: generatedunixname1734921407115435

Doc/library/bisect.rst

@@ -24,6 +24,16 @@ method to determine whether a value has been found.  Instead, the
 functions only call the :meth:`~object.__lt__` method and will return an insertion
 point between values in an array.
 
+.. note::
+
+   The functions in this module are not thread-safe. If multiple threads
+   concurrently use :mod:`bisect` functions on the same sequence, this
+   may result in undefined behaviour. Likewise, if the provided sequence
+   is mutated by a different thread while a :mod:`bisect` function
+   is operating on it, the result is undefined. For example, using
+   :py:func:`~bisect.insort_left` on the same list from multiple threads
+   may result in the list becoming unsorted.
+
 .. _bisect functions:
 
 The following functions are provided:

Doc/library/http.cookies.rst

@@ -148,9 +148,12 @@ Morsel Objects
    in HTTP requests, and is not accessible through JavaScript. This is intended
    to mitigate some forms of cross-site scripting.
 
-   The attribute :attr:`samesite` specifies that the browser is not allowed to
-   send the cookie along with cross-site requests. This helps to mitigate CSRF
-   attacks. Valid values for this attribute are "Strict" and "Lax".
+   The attribute :attr:`samesite` controls when the browser sends the cookie with
+   cross-site requests. This helps to mitigate CSRF attacks. Valid values are
+   "Strict" (only sent with same-site requests), "Lax" (sent with same-site
+   requests and top-level navigations), and "None" (sent with same-site and
+   cross-site requests). When using "None", the "secure" attribute must also
+   be set, as required by modern browsers.
 
    The attribute :attr:`partitioned` indicates to user agents that these
    cross-site cookies *should* only be available in the same top-level context

Doc/library/typing.rst

@@ -3357,7 +3357,7 @@ Introspection helpers
      with ``T``, unless *include_extras* is set to ``True`` (see
      :class:`Annotated` for more information).
 
-   See also :func:`inspect.get_annotations`, a lower-level function that
+   See also :func:`annotationlib.get_annotations`, a lower-level function that
    returns annotations more directly.
 
    .. note::

Lib/test/test_free_threading/test_bisect.py

@@ -0,0 +1,56 @@
+import unittest
+from test.support import import_helper, threading_helper
+import random
+
+py_bisect = import_helper.import_fresh_module('bisect', blocked=['_bisect'])
+c_bisect = import_helper.import_fresh_module('bisect', fresh=['_bisect'])
+
+
+NTHREADS = 4
+OBJECT_COUNT = 500
+
+
+class TestBase:
+    def do_racing_insort(self, insert_method):
+        def insert(data):
+            for _ in range(OBJECT_COUNT):
+                x = random.randint(-OBJECT_COUNT, OBJECT_COUNT)
+                insert_method(data, x)
+
+        data = list(range(OBJECT_COUNT))
+        threading_helper.run_concurrently(
+            worker_func=insert, args=(data,), nthreads=NTHREADS
+        )
+        if False:
+            # These functions are not thread-safe and so the list can become
+            # unsorted.  However, we don't want Python to crash if these
+            # functions are used concurrently on the same sequence.  This
+            # should also not produce any TSAN warnings.
+            self.assertTrue(self.is_sorted_ascending(data))
+
+    def test_racing_insert_right(self):
+        self.do_racing_insort(self.mod.insort_right)
+
+    def test_racing_insert_left(self):
+        self.do_racing_insort(self.mod.insort_left)
+
+    @staticmethod
+    def is_sorted_ascending(lst):
+        """
+        Check if the list is sorted in ascending order (non-decreasing).
+        """
+        return all(lst[i - 1] <= lst[i] for i in range(1, len(lst)))
+
+
+@threading_helper.requires_working_threading()
+class TestPyBisect(unittest.TestCase, TestBase):
+    mod = py_bisect
+
+
+@threading_helper.requires_working_threading()
+class TestCBisect(unittest.TestCase, TestBase):
+    mod = c_bisect
+
+
+if __name__ == "__main__":
+    unittest.main()