The instance destructor for a type is responsible for preparing
an instance for deallocation by decrementing the reference counts
of its referents.

If an instance belongs to a heap type, the type object of an instance
has its reference count decremented while for static types, which
are permanently allocated, the type object is unaffected by the
instance destructor.

Previously, the default instance destructor searched the class
hierarchy for an inherited instance destructor and, if present,
would invoke it.

Then, if the instance type is a heap type, it would decrement the
reference count of that heap type.  However, this could result in the
premature destruction of a type because the inherited instance
destructor should have already decremented the reference count
of the type object.

This change avoids the premature destruction of the type object
by suppressing the decrement of its reference count when an
inherited, non-default instance destructor has been invoked.

Finally, an assertion on the Py_SIZE of a type was deleted.  Heap
types have a non zero size, making this into an incorrect assertion.

https://github.com/python/cpython/pull/15323

https://bugs.python.org/issue36373

Add unittests for executables with a zipfile appended to test_zipfile, as zipfile.is_zipfile and zipfile.ZipFile work properly on these today.

The `wb.len = -1` assignment is unneeded since its introduction in 161d695f as `PyObject_GetBuffer` always fills it in.

In text mode, the "size" parameter indicates the number of characters, not bytes.

In the table model used by docutils, the `cols` attribute of `tgroup`
nodes is mandatory, see [1]. It is used in texinfo builder in [2].

[1]: https://www.oasis-open.org/specs/tm9901.htm#AEN348
[2]: https://github.com/sphinx-doc/sphinx/blob/v2.1.2/sphinx/writers/texinfo.py#L1129

* Doc: Add texinfo support to the Makefile

https://gitlab.com/python-devs/importlib_metadata/-/tags/0.21

It looks like "cryptographically strong" is the preferred phrase from the surrounding documentation.

Automerge-Triggered-By: @tiran

* Optimize sum() for bools.

* Fix sum([], False).

* Add a NEWS entry.

* Improve doc on open's mode +

* Improve wording

* Address comment from Rémi

Makes the pwd module PEP-384 compatible


https://bugs.python.org/issue38073



Automerge-Triggered-By: @tiran

feed_eof(), feed_data(), set_exception(), and set_transport() are prefixed with underscore now.


https://bugs.python.org/issue38066

Document how $ and % can be escaped in configparser.

This PR deprecate explicit loop parameters in all public asyncio APIs

This issues is split to be easier to review.

fourth step: queue.py





https://bugs.python.org/issue36373

Add functions with various calling conventions to `_testcapi`, expose them as module-level functions, bound methods, class methods, and static methods, and test calling them and introspecting them through GDB.


https://bugs.python.org/issue37499Co-authored-by: Jeroen Demeyer <J.Demeyer@UGent.be>
Automerge-Triggered-By: @pganssle

Summary:
Eliminate uses of `_Py_IDENTIFIER` from `_posixsubprocess`, replacing them with interned strings.

Also tries to find an existing version of the module, which will allow subinterpreters.



https://bugs.python.org/issue38069

This PR deprecate explicit loop parameters in all public asyncio APIs

This issues is split to be easier to review.

Third step: locks.py





https://bugs.python.org/issue36373

Assume gettimeofday exists and takes two arguments.

Add examples for mocking asynchronous iterators and asynchronous context managers.


https://bugs.python.org/issue37052

Make the termios module PEP-384 compatible.

Make the grp module PEP-384 compliant.