Infinite recursion in the tokenizer when emitting invalid escape sequence warnings #107967
Description
Checklist
- I am confident this is a bug in CPython, not a bug in a third-party project
- I have searched the CPython issue tracker,
and am confident this bug has not been reported before
CPython versions tested on:
3.12, CPython main branch
Operating systems tested on:
macOS
Output from running 'python -VV' on the command line:
Python 3.11.3 (main, May 8 2023, 13:16:43) [Clang 14.0.3 (clang-1403.0.22.14.1)]
A clear and concise description of the bug:
The tokenizer has an infinite recursion when emitting an invalid escape sequence SyntaxWarning. This was probably introduced in #106993. Fix will be up shortly.