python / cpython

…H-23062)

…GH-23059)

[bpo-29566]() notes that binhex.binhex uses inconsistent line endings (both Unix and MacOS9 line endings are used). This PR changes this to use the MacOS9 line endings everywhere.

* bpo-42146: Unify cleanup in subprocess_fork_exec()

Also ignore errors from _enable_gc():
* They are always suppressed by the current code due to a bug.
* _enable_gc() is only used if `preexec_fn != None`, which is unsafe.
* We don't have a good way to handle errors in case we successfully
  created a child process.

Co-authored-by: Gregory P. Smith <greg@krypto.org>

Left-recursive rules need to check for errors explicitly, since
even if the rule returns NULL, the parsing might continue and lead
to long-distance failures.

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

No backport is required since union is only in 3.10.

This addresses "3. Consistency nitpicks for Union's docs" in the bpo.

Please skip news. Thank you.

…GH-22484)

`_RandomNameSequence` is not true singleton so using `os.register_at_fork` doesn't make sense unlike `random._inst`.

This reverts commit 8e409ce.

* Add a new _locale._get_locale_encoding() function to get the
  current locale encoding.
* Modify locale.getpreferredencoding() to use it.
* Remove the _bootlocale module.

_io.TextIOWrapper no longer calls getpreferredencoding(False) of
_bootlocale to get the locale encoding, but calls
_Py_GetLocaleEncoding() instead.

Add config_get_fs_encoding() sub-function. Reorganize also
config_get_locale_encoding() code.

…ry_as_flufl rule (GH-23048)

Sort also dependencies and remove duplicates (liblzma-dev).

…23044)

The last GC collection is now done before clearing builtins and sys
dictionaries. Add also assertions to ensure that gc.collect() is no
longer called after _PyGC_Fini().

Pass also the tstate to PyInterpreterState_Clear() to pass the
correct tstate to _PyGC_CollectNoFail() and _PyGC_Fini().

This is a little bit of clean-up, small fixes, and additional helpers prior to building an updated & accurate list of globals to eliminate.

The gcmodule.c collect() function was renamed to gc_collect_main():
update gdb/libpython.py (python-gdb.py).

Move _PyImport_Cleanup() to pylifecycle.c, rename it to
finalize_modules(), split it (200 lines) into many smaller
sub-functions and cleanup the code.

Move private _PyGC_CollectNoFail() to the internal C API.

Remove the private _PyGC_CollectIfEnabled() which was just an alias
to the public PyGC_Collect() function since Python 3.8.

Rename functions:

* collect() => gc_collect_main()
* collect_with_callback() => gc_collect_with_callback()
* collect_generations() => gc_collect_generations()

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

…er (GH-23035)

The _RandomSequence class in tempfile used to check the current pid every time its rng property was used.
This commit replaces this code with `os.register_at_fork` to reduce the overhead.

Follow up to 7cdf30f and 4173320. This addresses the point "1. Update links in typing, subscription and union to point to GenericAlias." in the bpo for this PR.

Automerge-Triggered-By: GH:ericvsmith

https://bugs.python.org/issue42180

IRIX code was slowy removed in Python 2.4 (--with-sgi-dl), Python 3.3
(Irix threads), and Python 3.7.

…ing the func object (GH-22953)

func_dealloc() does not handle partially-created objects. Best not to give it any.

Use pickle.DEFAULT_PROTOCOL (currently 5) in shelve instead of a
hardcoded 3.

Move the _PyLong_GetOne() call outside the fast-path loop.

Use PyLong_FromLong(0) and PyLong_FromLong(1) of the public C API
instead. For Python internals, _PyLong_GetZero() and _PyLong_GetOne()
of pycore_long.h can be used.

)

* Use Py_TYPE() rather than o->ob_type.