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2d2c1d0c97
In Python 3.9.5+ urllib.parse() automatically removes ASCII newlines
and tabs from URLs [1, 2]. Unfortunately it created an issue in
the URLValidator. URLValidator uses urllib.urlsplit() and
urllib.urlunsplit() for creating a URL variant with Punycode which no
longer contains newlines and tabs in Python 3.9.5+. As a consequence,
the regular expression matched the URL (without unsafe characters) and
the source value (with unsafe characters) was considered valid.
[1] https://bugs.python.org/issue43882 and
[2] 76cd81d603
Backport of e1e81aa1c4427411e3c68facdd761229ffea6f6f from main.
To run the test suite, first, create and activate a virtual environment. Then
install some requirements and run the tests::
$ cd tests
$ python -m pip install -e ..
$ python -m pip install -r requirements/py3.txt
$ ./runtests.py
For more information about the test suite, see
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/.