Vincent Michel [Thu, 9 Sep 2021 13:12:03 +0000 (15:12 +0200)]
bpo-44219: Release the GIL during isatty syscalls (GH-28250)
Release the GIL while performing isatty() system calls on arbitrary
file descriptors. In particular, this affects os.isatty(),
os.device_encoding() and io.TextIOWrapper. By extension,
io.open() in text mode is also affected.
Due to significant security concerns, the reuse_address parameter of
asyncio.loop.create_datagram_endpoint, deprecated in Python 3.9, is
now removed. This is because of the behavior of the socket option
SO_REUSEADDR in UDP.
Remove deprecated __getitem__ methods of xml.dom.pulldom.DOMEventStream,
wsgiref.util.FileWrapper and fileinput.FileInput, deprecated since Python 3.9.
Victor Stinner [Wed, 8 Sep 2021 09:59:13 +0000 (11:59 +0200)]
bpo-39573: Py_TYPE becomes a static inline function (GH-28128)
Convert the Py_TYPE() and Py_SIZE() macros to static inline
functions. The Py_SET_TYPE() and Py_SET_SIZE() functions must now be
used to set an object type and size.
The deallocator function of the BaseException type now uses the
trashcan mecanism to prevent stack overflow. For example, when a
RecursionError instance is raised, it can be linked to another
RecursionError through the __context__ attribute or the __traceback__
attribute, and then a chain of exceptions is created. When the chain
is destroyed, nested deallocator function calls can crash with a
stack overflow if the chain is too long compared to the available
stack memory.
bpo-45123: PyAiter_Check and PyObject_GetAiter fix & rename. (GH-28194)
Fix PyAiter_Check to only check for the `__anext__` presense (not for
`__aiter__`). Rename `PyAiter_Check()` to `PyAIter_Check()`,
`PyObject_GetAiter()` -> `PyObject_GetAIter()`.
Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
Tim Peters [Mon, 6 Sep 2021 17:54:41 +0000 (12:54 -0500)]
bpo-34561: Switch to Munro & Wild "powersort" merge strategy. (#28108)
For list.sort(), replace our ad hoc merge ordering strategy with the principled, elegant,
and provably near-optimal one from Munro and Wild's "powersort".
Victor Stinner [Thu, 2 Sep 2021 17:02:03 +0000 (19:02 +0200)]
bpo-45082: Cleanup ctypes.c_buffer alias (GH-28129)
* Remove commented deprecation of ctypes.c_buffer.
* Remove references to ctypes.c_string which doesn't exist.
* Remove StringTestCase: it only had skipped test methods.
Ville Korhonen [Thu, 2 Sep 2021 16:03:22 +0000 (16:03 +0000)]
[doc] Reword sentinel object summary in dataclasses (GH-27792)
This sentinel value (`MISSING`) is also used as default value for the `kw_only` parameter introduced in Python 3.10. It's cleaner to simply omit the usage here.
Victor Stinner [Thu, 2 Sep 2021 10:58:00 +0000 (12:58 +0200)]
bpo-37330: open() no longer accept 'U' in file mode (GH-28118)
open(), io.open(), codecs.open() and fileinput.FileInput no longer
accept "U" ("universal newline") in the file mode. This flag was
deprecated since Python 3.3.
Victor Stinner [Wed, 1 Sep 2021 15:45:27 +0000 (17:45 +0200)]
bpo-44895: libregrtest: refleak check clears types later (GH-28113)
libregrtest now clears the type cache later to reduce the risk of
false alarm when checking for reference leaks. Previously, the type
cache was cleared too early and libregrtest raised a false alarm
about reference leaks under very specific conditions.
Move also support.gc_collect() outside clear/cleanup functions to
make the garbage collection more explicit.
Eric Snow [Mon, 30 Aug 2021 23:25:11 +0000 (17:25 -0600)]
bpo-45019: Add a tool to generate list of modules to include for frozen modules (gh-27980)
Frozen modules must be added to several files in order to work properly. Before this change this had to be done manually. Here we add a tool to generate the relevant lines in those files instead. This helps us avoid mistakes and omissions.
Serhiy Storchaka [Mon, 30 Aug 2021 16:25:59 +0000 (19:25 +0300)]
bpo-43913: Fix bugs in cleaning up classes and modules in unittest. (GH-28006)
* Functions registered with addModuleCleanup() were not called unless
the user defines tearDownModule() in their test module.
* Functions registered with addClassCleanup() were not called if
tearDownClass is set to None.
* Buffering in TestResult did not work with functions registered
with addClassCleanup() and addModuleCleanup().
* Errors in functions registered with addClassCleanup() and
addModuleCleanup() were not handled correctly in buffered and
debug modes.
* Errors in setUpModule() and functions registered with
addModuleCleanup() were reported in wrong order.
* And several lesser bugs.
Tobias Bergkvist [Mon, 30 Aug 2021 06:55:47 +0000 (08:55 +0200)]
bpo-44689: ctypes.util.find_library() now finds macOS 11+ system libraries when built on older macOS systems (#27251)
Previously, when built on older macOS systems, `find_library` was not able to find macOS system libraries when running on Big Sur due to changes in how system libraries are stored.
Victor Stinner [Sun, 29 Aug 2021 14:08:24 +0000 (16:08 +0200)]
bpo-44394: Update libexpat copy to 2.4.1 (GH-26945)
Update the vendored copy of libexpat to 2.4.1 (from 2.2.8) to get the
fix for the CVE-2013-0340 "Billion Laughs" vulnerability. This copy
is most used on Windows and macOS.