Import CPython 3.14.7+ stable branch (2026-08-31)

Summary:
Imported python/cpython `3.14.7+` from upstream rev [`4e8bce4`](https://www.github.com/python/cpython/commit/4e8bce4d547eab49410ae9fb0fcf7b67c2349056) (committed 2026-08-31 22:19:05+00:00).

# Commit Info

- Base: (`3.14.7+`) - [`686b543`](https://www.github.com/python/cpython/commit/686b543e1ea13f0161dc46da59770be283c3b54c) (commit date: 2026-08-30 22:10:27+00:00)
- Imported: (`3.14.7+`) - [`4e8bce4`](https://www.github.com/python/cpython/commit/4e8bce4d547eab49410ae9fb0fcf7b67c2349056) (commit date: 2026-08-31 22:19:05+00:00)

# Noteworthy file changes

- Low-signal files (6 added, 1 removed) (NEWS.d, docs, .github)

Complete list of added/removed files: https://www.internalfb.com/intern/everpaste/?color=0&handle=GMWRlRbVc_zTkaIFADlTbQBwU7swbr0LAAAz

Reviewed By: itamaro

Differential Revision: D118270998

fbshipit-source-id: cb1a19102846a23d59835babd7e78f08666d48e6

Author: generatedunixname1734921407115435

Doc/library/ast.rst

@@ -2257,7 +2257,7 @@ and classes for traversing abstract syntax trees:
 
    In addition, if ``mode`` is ``'func_type'``, the input syntax is
    modified to correspond to :pep:`484` "signature type comments",
-   e.g. ``(str, int) -> List[str]``.
+   for example ``(str, int) -> List[str]``.
 
    Setting ``feature_version`` to a tuple ``(major, minor)`` will result in
    a "best-effort" attempt to parse using that Python version's grammar.

Lib/asyncio/tasks.py

@@ -562,9 +562,11 @@ def __init__(self, aws, timeout):
         self._timeout_handle = None
 
         loop = events.get_event_loop()
+        self._cur_task = current_task()
         todo = {ensure_future(aw, loop=loop) for aw in set(aws)}
         for f in todo:
             f.add_done_callback(self._handle_completion)
+            futures.future_add_to_awaited_by(f, self._cur_task)
         if todo and timeout is not None:
             self._timeout_handle = (
                 loop.call_later(timeout, self._handle_timeout)
@@ -595,13 +597,15 @@ def __next__(self):
     def _handle_timeout(self):
         for f in self._todo:
             f.remove_done_callback(self._handle_completion)
+            futures.future_discard_from_awaited_by(f, self._cur_task)
             self._done.put_nowait(None)  # Sentinel for _wait_for_one().
         self._todo.clear()  # Can't do todo.remove(f) in the loop.
 
     def _handle_completion(self, f):
         if not self._todo:
             return  # _handle_timeout() was here first.
         self._todo.remove(f)
+        futures.future_discard_from_awaited_by(f, self._cur_task)
         self._done.put_nowait(f)
         if not self._todo and self._timeout_handle is not None:
             self._timeout_handle.cancel()

Lib/configparser.py

@@ -618,7 +618,8 @@ class RawConfigParser(MutableMapping):
     _OPT_TMPL = r"""
         (?P<option>                        # very permissive!
             (?:(?!{delim})\S)*             # non-delimiter non-whitespace
-            (?:\s+(?:(?!{delim})\S)+)*)    # optionally more words
+            (?:(?:(?!{delim})\s)+          # optionally more
+             (?:(?!{delim})\S)+)*)         #   space-separated words
         \s*(?P<vi>{delim})\s*              # any number of space/tab,
                                            # followed by any of the
                                            # allowed delimiters,
@@ -628,7 +629,8 @@ class RawConfigParser(MutableMapping):
     _OPT_NV_TMPL = r"""
         (?P<option>                        # very permissive!
             (?:(?!{delim})\S)*             # non-delimiter non-whitespace
-            (?:\s+(?:(?!{delim})\S)+)*)    # optionally more words
+            (?:(?:(?!{delim})\s)+          # optionally more
+             (?:(?!{delim})\S)+)*)         #   space-separated words
         \s*(?:                             # any number of space/tab,
         (?P<vi>{delim})\s*                 # optionally followed by
                                            # any of the allowed

Lib/test/support/os_helper.py

@@ -433,7 +433,10 @@ def _rmtree_inner(path):
                           file=sys.__stderr__)
                     mode = 0
                 if stat.S_ISDIR(mode):
-                    _waitfor(_rmtree_inner, fullname, waitall=True)
+                    # Do not follow junctions, which os.lstat() reports
+                    # as directories.
+                    if not os.path.isjunction(fullname):
+                        _waitfor(_rmtree_inner, fullname, waitall=True)
                     _force_run(fullname, os.rmdir, fullname)
                 else:
                     _force_run(fullname, os.unlink, fullname)

Lib/test/test_ast/test_ast.py

@@ -152,6 +152,15 @@ def test_parse_invalid_ast(self):
             self.assertRaises(TypeError, ast.parse, ast.Constant(42),
                               optimize=optval)
 
+    def test_parse_ast_func_type(self):
+        # see gh-156689
+        tree = ast.parse('(int, str) -> bool', mode='func_type')
+        self.assertEqual(ast.dump(ast.parse(tree, mode='func_type')),
+                         ast.dump(tree))
+        self.assertRaises(TypeError, ast.parse, ast.Constant(42),
+                          mode='func_type')
+        self.assertRaises(TypeError, ast.parse, tree, mode='exec')
+
     def test_optimization_levels__debug__(self):
         cases = [(-1, '__debug__'), (0, '__debug__'), (1, False), (2, False)]
         for (optval, expected) in cases:

Lib/test/test_asyncio/test_graph.py

@@ -271,6 +271,68 @@ async def main(t1, t2):
             ]
         ])
 
+    async def test_stack_as_completed(self):
+        # gh-156523: as_completed() must record the awaiting task
+        stack_for_inner = None
+
+        async def inner():
+            await asyncio.sleep(0)
+            nonlocal stack_for_inner
+            stack_for_inner = capture_test_stack()
+
+        async def main(t):
+            for f in asyncio.as_completed([t]):
+                await f
+
+        t = asyncio.create_task(inner(), name='inner')
+        await main(t)
+        self.assertFalse(t._asyncio_awaited_by)
+
+        self.assertEqual(stack_for_inner[0], [
+            'T<inner>',
+            ['s capture_test_stack', 'a inner'],
+            [
+                ['T<anon>',
+                    ['a get', 'a _wait_for_one', 'a main',
+                     'a test_stack_as_completed'],
+                    []
+                ]
+            ]
+        ])
+
+    async def test_stack_as_completed_timeout(self):
+        # gh-156523: the awaiting task must be dropped when as_completed() times out
+        stack_for_inner = None
+
+        async def inner():
+            nonlocal stack_for_inner
+            stack_for_inner = capture_test_stack()
+            await asyncio.sleep(3600)
+
+        async def main(t):
+            with self.assertRaises(TimeoutError):
+                for f in asyncio.as_completed([t], timeout=0.01):
+                    await f
+
+        t = asyncio.create_task(inner(), name='inner')
+        await main(t)
+        self.assertFalse(t._asyncio_awaited_by)
+        t.cancel()
+        with self.assertRaises(asyncio.CancelledError):
+            await t
+
+        self.assertEqual(stack_for_inner[0], [
+            'T<inner>',
+            ['s capture_test_stack', 'a inner'],
+            [
+                ['T<anon>',
+                    ['a get', 'a _wait_for_one', 'a main',
+                     'a test_stack_as_completed_timeout'],
+                    []
+                ]
+            ]
+        ])
+
     async def test_stack_task(self):
 
         stack_for_inner = None

Lib/test/test_configparser.py

@@ -43,7 +43,7 @@ class CfgParserTestCaseClass:
     default_section = configparser.DEFAULTSECT
     interpolation = configparser._UNSET
 
-    def newconfig(self, defaults=None):
+    def newconfig(self, defaults=None, **kwargs):
         arguments = dict(
             defaults=defaults,
             allow_no_value=self.allow_no_value,
@@ -56,6 +56,7 @@ def newconfig(self, defaults=None):
             default_section=self.default_section,
             interpolation=self.interpolation,
         )
+        arguments.update(kwargs)
         instance = self.config_class(**arguments)
         return instance
 
@@ -358,6 +359,32 @@ def test_basic(self):
                 the larch {0[1]} 1
             """.format(self.delimiters)))
 
+    @support.subTests('data', [
+        'foo bar=baz',
+        'foo   bar=baz',
+        'foo=bar=baz',
+        'foo = bar=baz',
+        'foo\t \t=\t \tbar=baz',
+    ])
+    def test_space_delimiter(self, data):
+        # gh-156353: Space should be accepted as a delimiter
+        cf = self.newconfig(delimiters=(' ', '='))
+        cf.read_string(f"[all]\n{data}")
+        self.assertEqual(cf.options('all'), ['foo'])
+        self.assertEqual(cf.get('all', 'foo'), 'bar=baz')
+
+    @support.subTests('delimiter', ' =:;#x\t\0\N{RS}\N{CEDILLA}\N{CAT}')
+    @support.subTests('space_before', ['', ' ', '\t', ' \t'])
+    @support.subTests('space_after', ['', ' ', '\t', ' \t'])
+    def test_any_delimiter(self, delimiter, space_before, space_after):
+        cf = self.newconfig(
+            delimiters=(delimiter,),
+            inline_comment_prefixes=None,
+        )
+        cf.read_string(f"[all]\nfoo{space_before}{delimiter}{space_after}bar=baz")
+        self.assertEqual(cf.options('all'), ['foo'])
+        self.assertEqual(cf.get('all', 'foo'), 'bar=baz')
+
     def test_basic_from_dict(self):
         config = {
             "Foo Bar": {
@@ -1991,8 +2018,8 @@ class ConvertersTestCase(BasicTestCase, unittest.TestCase):
 
     config_class = configparser.ConfigParser
 
-    def newconfig(self, defaults=None):
-        instance = super().newconfig(defaults=defaults)
+    def newconfig(self, defaults=None, **kwargs):
+        instance = super().newconfig(defaults=defaults, **kwargs)
         instance.converters['list'] = lambda v: [e.strip() for e in v.split()
                                                  if e.strip()]
         return instance

Lib/test/test_xml_etree.py

@@ -1024,6 +1024,34 @@ def bxml(encoding, body=''):
         self.assertRaises(ValueError, ET.XML, xml('undefined').encode('ascii'))
         self.assertRaises(LookupError, ET.XML, xml('xxx').encode('ascii'))
 
+    def test_parse_text_source(self):
+        # gh-99064: The encoding declared in the document does not apply
+        # to a source which is already decoded.
+        def check(encoding, body):
+            xml = (f"<?xml version='1.0' encoding='{encoding}'?>"
+                   f"<xml>{body}</xml>")
+            with self.subTest(encoding=encoding):
+                self.assertEqual(ET.parse(io.StringIO(xml)).getroot().text,
+                                 body)
+                # the same with an explicitly created parser
+                self.assertEqual(
+                    ET.parse(io.StringIO(xml), ET.XMLParser()).getroot().text,
+                    body)
+        check("ascii", 'a')
+        check("iso-8859-1", '\xbd')
+        check("iso-8859-15", '\u20ac')
+        check("cp437", '\u221a')
+        check("utf-8", '\u4e2d')
+        # not ASCII compatible, unsupported for a bytes source
+        check("utf-16", '\u4e2d')
+        check("utf-32", '\u4e2d')
+
+    def test_parse_text_source_multiple_chunks(self):
+        # the encoding is overridden before the first chunk is parsed
+        body = '\xe4' * 100_000
+        xml = "<?xml version='1.0' encoding='ISO-8859-1'?><xml>%s</xml>" % body
+        self.assertEqual(ET.parse(io.StringIO(xml)).getroot().text, body)
+
     def test_methods(self):
         # Test serialization methods.
 

Misc/NEWS.d/next/C_API/2026-08-31-19-14-15.gh-issue-156101.d4PSIF.rst

@@ -0,0 +1,4 @@
+Don't set the result in error in :c:func:`PyLong_AsInt32`,
+:c:func:`PyLong_AsUInt32`, :c:func:`PyLong_AsInt64` and
+:c:func:`PyLong_AsUInt64`. Leave the result unchanged in this case. Patch by
+Victor Stinner.

Misc/NEWS.d/next/Core_and_Builtins/2026-08-31-10-45-11.gh-issue-156689.Jq3xNv.rst

@@ -0,0 +1,2 @@
+Fix an out-of-bounds read in :func:`compile` and :func:`ast.parse` when an AST
+object is passed with ``mode='func_type'``.