Import CPython 3.14.6+ stable branch (2026-07-14)

Summary:
Imported python/cpython `3.14.6+` from upstream rev [`e2818a7`](https://www.github.com/python/cpython/commit/e2818a74c65f0937eec071ae3fc0032e59b80c09) (committed 2026-07-14 08:22:43+00:00).

# Commit Info

- Base: (`3.14.6+`) - [`c628cd7`](https://www.github.com/python/cpython/commit/c628cd70506c66aee281a47be5627cbced10f3b2) (commit date: 2026-07-13 10:10:10+00:00)
- Imported: (`3.14.6+`) - [`e2818a7`](https://www.github.com/python/cpython/commit/e2818a74c65f0937eec071ae3fc0032e59b80c09) (commit date: 2026-07-14 08:22:43+00:00)

# Noteworthy file changes

- Low-signal files (1 added) (NEWS.d, docs, .github)

Complete list of added/removed files: https://www.internalfb.com/intern/everpaste/?color=0&handle=GBmu9yV86nlhGnoHAFMEONkimiRpbr0LAAAz

Reviewed By: itamaro

Differential Revision: D111998264

fbshipit-source-id: ed79a690a8ec5e9189a1b0588886f7923d7317b7

Author: generatedunixname1734921407115435

.github/workflows/build.yml

@@ -387,23 +387,14 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-ios == 'true'
     timeout-minutes: 60
-    runs-on: macos-14
+    runs-on: macos-26
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
-      # GitHub recommends explicitly selecting the desired Xcode version:
-      # https://github.com/actions/runner-images/issues/12541#issuecomment-3083850140
-      # This became a necessity as a result of
-      # https://github.com/actions/runner-images/issues/12541 and
-      # https://github.com/actions/runner-images/issues/12751.
-      - name: Select Xcode version
-        run: |
-          sudo xcode-select --switch /Applications/Xcode_15.4.app
-
       - name: Build and test
-        run: python3 Apple ci iOS --fast-ci --simulator 'iPhone SE (3rd generation),OS=17.5'
+        run: python3 Apple ci iOS --fast-ci
 
   build-emscripten:
     name: 'Emscripten'

Apple/testbed/__main__.py

@@ -271,8 +271,14 @@ def run_testbed(
     update_test_plan(location, platform, args)
     print(" done.")
 
+    # xcodebuild doesn't guarantee that the CoreSimulatorService daemon is
+    # running prior to using a simulator, but calling `xcrun simctl list` does.
+    # Determining the default simulator that *would* be used is a cheap action;
+    # so use that as a way to ensure that the CoreSimulatorService daemon is
+    # running.
+    default_simulator = select_simulator_device(platform)
     if simulator is None:
-        simulator = select_simulator_device(platform)
+        simulator = default_simulator
     print(f"Running test on {simulator}")
 
     xcode_test(

Doc/library/asyncio-eventloop.rst

@@ -1274,7 +1274,9 @@ Working with pipes
    *protocol_factory* must be a callable returning an
    :ref:`asyncio protocol <asyncio-protocol>` implementation.
 
-   *pipe* is a :term:`file-like object <file object>`.
+   *pipe* is a :term:`file-like object <file object>`.  See
+   :ref:`Supported pipe objects <asyncio-pipe-objects>` for the objects
+   supported as *pipe*.
 
    Return pair ``(transport, protocol)``, where *transport* supports
    the :class:`ReadTransport` interface and *protocol* is an object
@@ -1291,7 +1293,9 @@ Working with pipes
    *protocol_factory* must be a callable returning an
    :ref:`asyncio protocol <asyncio-protocol>` implementation.
 
-   *pipe* is :term:`file-like object <file object>`.
+   *pipe* is a :term:`file-like object <file object>`.  See
+   :ref:`Supported pipe objects <asyncio-pipe-objects>` for the objects
+   supported as *pipe*.
 
    Return pair ``(transport, protocol)``, where *transport* supports
    :class:`WriteTransport` interface and *protocol* is an object
@@ -1300,6 +1304,33 @@ Working with pipes
    With :class:`SelectorEventLoop` event loop, the *pipe* is set to
    non-blocking mode.
 
+.. _asyncio-pipe-objects:
+
+.. rubric:: Supported pipe objects
+
+These methods only work with objects the operating system can poll for
+readiness or perform overlapped I/O on.  Regular files on disk are **not**
+supported on any platform.  There is no asynchronous file I/O in asyncio;
+use :meth:`loop.run_in_executor` to read and write regular files without
+blocking the event loop.
+
+On Unix, with :class:`SelectorEventLoop`, *pipe* must wrap one of the
+following:
+
+* a pipe, such as an end of an :func:`os.pipe` pair or a FIFO created with
+  :func:`os.mkfifo`;
+* a socket;
+* a character device, such as a terminal.
+
+On Windows, where only :class:`ProactorEventLoop` implements these methods,
+*pipe* must wrap a handle opened for overlapped I/O (that is, created with the
+``FILE_FLAG_OVERLAPPED`` flag), since the handle has to be associated with an
+I/O completion port.  Handles that were not opened for overlapped I/O are
+rejected.  In particular, the standard streams (:data:`sys.stdin`,
+:data:`sys.stdout` and :data:`sys.stderr`), console handles, and the pipes
+created by :func:`os.pipe` are **not** opened for overlapped I/O and therefore
+cannot be used with these methods.
+
 .. note::
 
    :class:`SelectorEventLoop` does not support the above methods on

Doc/library/asyncio-platforms.rst

@@ -19,6 +19,11 @@ All Platforms
 * :meth:`loop.add_reader` and :meth:`loop.add_writer`
   cannot be used to monitor file I/O.
 
+* :meth:`loop.connect_read_pipe` and :meth:`loop.connect_write_pipe`
+  cannot be used with regular files.  See :ref:`Supported pipe objects
+  <asyncio-pipe-objects>` for the objects that are accepted on each
+  platform.
+
 
 Windows
 =======
@@ -62,6 +67,10 @@ All event loops on Windows do not support the following methods:
 * The :meth:`loop.add_reader` and :meth:`loop.add_writer`
   methods are not supported.
 
+* :meth:`loop.connect_read_pipe` and :meth:`loop.connect_write_pipe` only
+  accept a handle opened for overlapped I/O.
+  See :ref:`Supported pipe objects <asyncio-pipe-objects>` for which objects are supported.
+
 The resolution of the monotonic clock on Windows is usually around 15.6
 milliseconds.  The best resolution is 0.5 milliseconds. The resolution depends on the
 hardware (availability of `HPET

Lib/asyncio/proactor_events.py

@@ -62,6 +62,7 @@ def __init__(self, loop, sock, protocol, waiter=None,
         self._closing = False  # Set when close() called.
         self._called_connection_lost = False
         self._eof_written = False
+        self._empty_waiter = None
         if self._server is not None:
             self._server._attach(self)
         self._loop.call_soon(self._protocol.connection_made, self)
@@ -331,10 +332,6 @@ class _ProactorBaseWritePipeTransport(_ProactorBasePipeTransport,
 
     _start_tls_compatible = True
 
-    def __init__(self, *args, **kw):
-        super().__init__(*args, **kw)
-        self._empty_waiter = None
-
     def write(self, data):
         if not isinstance(data, (bytes, bytearray, memoryview)):
             raise TypeError(
@@ -465,7 +462,6 @@ class _ProactorDatagramTransport(_ProactorBasePipeTransport,
     def __init__(self, loop, sock, protocol, address=None,
                  waiter=None, extra=None):
         self._address = address
-        self._empty_waiter = None
         self._buffer_size = 0
         # We don't need to call _protocol.connection_made() since our base
         # constructor does it for us.

Lib/sqlite3/dump.py

@@ -11,8 +11,12 @@ def _quote_name(name):
     return '"{0}"'.format(name.replace('"', '""'))
 
 
+def _escape_single_quotes(value):
+    return value.replace("'", "''")
+
+
 def _quote_value(value):
-    return "'{0}'".format(value.replace("'", "''"))
+    return "'{0}'".format(_escape_single_quotes(value))
 
 
 def _iterdump(connection, *, filter=None):
@@ -80,11 +84,12 @@ def _iterdump(connection, *, filter=None):
         table_name_ident = _quote_name(table_name)
         res = cu.execute(f'PRAGMA table_info({table_name_ident})')
         column_names = [str(table_info[1]) for table_info in res.fetchall()]
-        q = "SELECT 'INSERT INTO {0} VALUES('{1}')' FROM {0};".format(
-            table_name_ident,
+        q = "SELECT 'INSERT INTO {0} VALUES('{1}')' FROM {2};".format(
+            _escape_single_quotes(table_name_ident),
             "','".join(
                 "||quote({0})||".format(_quote_name(col)) for col in column_names
-            )
+            ),
+            table_name_ident,
         )
         query_res = cu.execute(q)
         for row in query_res:

Lib/test/test_asyncio/test_events.py

@@ -33,6 +33,7 @@
 from multiprocessing.util import _cleanup_tests as multiprocessing_cleanup_tests
 from test.test_asyncio import utils as test_utils
 from test import support
+from test.support import os_helper
 from test.support import socket_helper
 from test.support import threading_helper
 from test.support import ALWAYS_EQ, LARGEST, SMALLEST
@@ -3172,5 +3173,100 @@ def test_get_loop(self):
             events.AbstractServer().get_loop()
 
 
+@unittest.skipIf(sys.platform == 'win32', 'Unix pipe transport semantics')
+class UnixPipeObjectSupportTests(unittest.TestCase):
+    def setUp(self):
+        super().setUp()
+        self.loop = asyncio.SelectorEventLoop()
+        self.addCleanup(self.loop.close)
+
+    def check_accepted(self, connect, pipeobj):
+        lost = self.loop.create_future()
+
+        class Proto(asyncio.Protocol):
+            def connection_lost(self, exc):
+                if not lost.done():
+                    lost.set_result(exc)
+
+        async def run():
+            transport, protocol = await connect(Proto, pipeobj)
+            self.assertIsInstance(protocol, Proto)
+            self.assertFalse(pipeobj.closed)
+            transport.close()
+            self.assertIsNone(await lost)
+
+        self.loop.run_until_complete(run())
+        self.assertTrue(pipeobj.closed)
+
+    def check_rejected(self, connect, pipeobj):
+        self.addCleanup(pipeobj.close)
+        with self.assertRaisesRegex(ValueError, 'Pipe transport is'):
+            self.loop.run_until_complete(connect(asyncio.Protocol, pipeobj))
+
+    def test_read_pipe(self):
+        rfd, wfd = os.pipe()
+        self.addCleanup(os.close, wfd)
+        self.check_accepted(self.loop.connect_read_pipe, open(rfd, 'rb', 0))
+
+    def test_write_pipe(self):
+        rfd, wfd = os.pipe()
+        self.addCleanup(os.close, rfd)
+        self.check_accepted(self.loop.connect_write_pipe, open(wfd, 'wb', 0))
+
+    def test_read_fifo(self):
+        path = os_helper.TESTFN
+        os.mkfifo(path)
+        self.addCleanup(os_helper.unlink, path)
+        rfd = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
+        wfd = os.open(path, os.O_WRONLY)
+        self.addCleanup(os.close, wfd)
+        self.check_accepted(self.loop.connect_read_pipe, open(rfd, 'rb', 0))
+
+    def test_write_fifo(self):
+        path = os_helper.TESTFN
+        os.mkfifo(path)
+        self.addCleanup(os_helper.unlink, path)
+        rfd = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
+        self.addCleanup(os.close, rfd)
+        wfd = os.open(path, os.O_WRONLY)
+        self.check_accepted(self.loop.connect_write_pipe, open(wfd, 'wb', 0))
+
+    def test_read_socket(self):
+        rsock, wsock = socket.socketpair()
+        self.addCleanup(wsock.close)
+        self.check_accepted(self.loop.connect_read_pipe,
+                            open(rsock.detach(), 'rb', 0))
+
+    def test_write_socket(self):
+        rsock, wsock = socket.socketpair()
+        self.addCleanup(rsock.close)
+        self.check_accepted(self.loop.connect_write_pipe,
+                            open(wsock.detach(), 'wb', 0))
+
+    @unittest.skipUnless(hasattr(os, 'openpty'), 'need os.openpty()')
+    def test_read_character_device(self):
+        master, slave = os.openpty()
+        self.addCleanup(os.close, slave)
+        self.check_accepted(self.loop.connect_read_pipe, open(master, 'rb', 0))
+
+    @unittest.skipUnless(hasattr(os, 'openpty'), 'need os.openpty()')
+    def test_write_character_device(self):
+        master, slave = os.openpty()
+        self.addCleanup(os.close, master)
+        self.check_accepted(self.loop.connect_write_pipe, open(slave, 'wb', 0))
+
+    def test_read_regular_file(self):
+        self.addCleanup(os_helper.unlink, os_helper.TESTFN)
+        with open(os_helper.TESTFN, 'wb') as f:
+            f.write(b'spam')
+        self.check_rejected(self.loop.connect_read_pipe,
+                            open(os_helper.TESTFN, 'rb', 0))
+
+    def test_write_regular_file(self):
+        self.addCleanup(os_helper.unlink, os_helper.TESTFN)
+        self.check_rejected(self.loop.connect_write_pipe,
+                            open(os_helper.TESTFN, 'wb', 0))
+
+
 if __name__ == '__main__':
     unittest.main()