New submission from Sergey B Kirpichev:
We know from release notes, that "A backslash-character pair that is not a
valid escape sequence now generates a DeprecationWarning". Sometimes it's true:
$ python -W error
Python 3.6.0b1+ (default, Oct 4 2016, 08:47:51)
[GCC 4.9.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> "xxx" != "hello \world"
DeprecationWarning: invalid escape sequence '\w'
But shouldn't DeprecationWarning be in the following case as well?
$ cat a.py
def f(s):
return s != "hello \world"
$ cat b.py
import a
print(a.f("xxx"))
$ python b.py
True
$ python -W error b.py
True
----------
components: Interpreter Core
messages: 278020
nosy: Sergey.Kirpichev
priority: normal
severity: normal
status: open
title: DeprecationWarning not reported for invalid escape sequences
versions: Python 3.6
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue28354>
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