id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 35361 SafeMIMEText.set_payload() crash on Python 3.11.9 Sarah Boyce Natalia Bidart "A recent bug fix to Python [https://github.com/python/cpython/issues/76511 gh-76511] has been back ported to Python 3.11 and 3.12. See the release notes of [https://docs.python.org/release/3.11.9/whatsnew/changelog.html#python-3-11-9 Python 3.11.9] and the soon to be released [https://docs.python.org/3/whatsnew/changelog.html Python 3.12.3]. As part of the work to prepare Django for [https://code.djangoproject.com/ticket/34900 Python 3.13], a fix for this has already been merged to main in b231bcd19e57267ce1fc21d42d46f0b65fdcfcf8. Believe this needs to be back ported to Django 4.2 and Django 5.0 to support the latest (or soon to be latest) Python 3.11 and Python 3.12 versions. Confirmed when testing Django 4.2 against Python 3.11.9, we know have the following test failure: {{{ ====================================================================== ERROR [0.034s]: test_dont_base64_encode (tests.mail.tests.MailTests.test_dont_base64_encode) ---------------------------------------------------------------------- Traceback (most recent call last): File ""/tests/django/tests/mail/tests.py"", line 902, in test_dont_base64_encode s = msg.message().as_string() ^^^^^^^^^^^^^^^^^^^^^^^^^ File ""/tests/django/django/core/mail/message.py"", line 133, in as_string g.flatten(self, unixfrom=unixfrom, linesep=linesep) File ""/usr/local/lib/python3.11/email/generator.py"", line 115, in flatten self._write(msg) File ""/usr/local/lib/python3.11/email/generator.py"", line 180, in _write self._dispatch(msg) File ""/usr/local/lib/python3.11/email/generator.py"", line 217, in _dispatch meth(msg) File ""/usr/local/lib/python3.11/email/generator.py"", line 246, in _handle_text msg.set_payload(msg._payload, charset) File ""/tests/django/django/core/mail/message.py"", line 168, in set_payload has_long_lines = any( ^^^^ File ""/tests/django/django/core/mail/message.py"", line 169, in len(line.encode()) > RFC5322_EMAIL_LINE_LENGTH_LIMIT ^^^^^^^^^^^^^ UnicodeEncodeError: 'utf-8' codec can't encode characters in position 28-33: surrogates not allowed }}} " Bug closed Core (Mail) 4.2 Release blocker fixed Accepted 1 0 0 0 0 0