GeezerVison

…lots1

* origin/master: (365 commits)
  bpo-42029: Remove IRIX code (pythonGH-23023)
  bpo-42143: Ensure PyFunction_NewWithQualName() can't fail after creating the func object (pythonGH-22953)
  bpo-34204: Use pickle.DEFAULT_PROTOCOL in shelve (pythonGH-19639)
  bpo-41805: Documentation for PEP 585 (pythonGH-22615)
  bpo-42161: Micro-optimize _collections._count_elements() (pythonGH-23008)
  bpo-42161: Remove private _PyLong_Zero and _PyLong_One (pythonGH-23003)
  bpo-42099: Fix reference to ob_type in unionobject.c and ceval (pythonGH-22829)
  bpo-41659: Disallow curly brace directly after primary (pythonGH-22996)
  bpo-6761: Enhance __call__ documentation (pythonGH-7987)
  bpo-42161: Modules/ uses _PyLong_GetZero() and _PyLong_GetOne() (pythonGH-22998)
  bpo-41474, Makefile: Add dependency on cpython/frameobject.h (pythonGH-22999)
  bpo-42157: Rename unicodedata.ucnhash_CAPI (pythonGH-22994)
  bpo-42161: Use _PyLong_GetZero() and _PyLong_GetOne() (pythonGH-22995)
  bpo-30681: Support invalid date format or value in email Date header (pythonGH-22090)
  bpo-42161: Add _PyLong_GetZero() and _PyLong_GetOne() (pythonGH-22993)
  bpo-42123: Run the parser two times and only enable invalid rules on the second run (pythonGH-22111)
  bpo-42157: Convert unicodedata.UCD to heap type (pythonGH-22991)
  bpo-42157: unicodedata avoids references to UCD_Type (pythonGH-22990)
  bpo-39101: Fixes BaseException hang in IsolatedAsyncioTestCase. (pythonGH-22654)
  bpo-1635741: _PyUnicode_Name_CAPI moves to internal C API (pythonGH-22713)
  ...

…ythonGH-22090)

I am re-submitting an older PR which was abandoned but is still relevant, python#10783 by @timb07.

The issue being solved () is still relevant. The original PR python#10783 was closed as
the final request changes were not applied and since abandoned.

In this new PR I have re-used the original patch plus applied both comments from the review, by @maxking and @pganssle.


For reference, here is the original PR description:
In email.utils.parsedate_to_datetime(), a failure to parse the date, or invalid date components (such as hour outside 0..23) raises an exception. Document this behaviour, and add tests to test_email/test_utils.py to confirm this behaviour.

In email.headerregistry.DateHeader.parse(), check when parsedate_to_datetime() raises an exception and add a new defect InvalidDateDefect; preserve the invalid value as the string value of the header, but set the datetime attribute to None.

Add tests to test_email/test_headerregistry.py to confirm this behaviour; also added test to test_email/test_inversion.py to confirm emails with such defective date headers round trip successfully.

This pull request incorporates feedback gratefully received from @bitdancer, @brettcannon, @Mariatta and @warsaw, and replaces the earlier PR python#2254.

Automerge-Triggered-By: GH:warsaw