I think it could be this:
A backslash-character pair that is not a valid escape sequence now
generates a SyntaxWarning, instead of DeprecationWarning. For example,
re.compile("\d+\.\d+") now emits a SyntaxWarning ("\d" is an invalid
escape sequence, use raw strings for regular expression:
re.compile(r"\d+\.\d+")). In a future Python version, SyntaxError will
eventually be raised, instead of SyntaxWarning. (Contributed by Victor
Stinner in gh-98401.)
Found in:
https://docs.python.org/3/whatsnew/3.12.html#other-language-changes
It's not supposed to crash your program though. If the program crashes
because of it, it's a bug in Python.
On Thu, May 8, 2025 at 7:00 AM Bob van der Poel via Python-list
<python-list@python.org> wrote:
>
> Did something change in python buggering up my use of a "\ " sequence in a
> triple quoted string?
>
> I have yet to go through my archive on the program, but I tried to run it
> today and it crashed quite spectacularly when it hit a """ .... """ line
> being used as a comment at the top of a function. I changed the "\" to a
> "/" and all is well now.
>
>
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>
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