New warning: `unused variable ‘st’ [-Wunused-variable]`

[Eclips4]

Bug report

Bug description:

Popped up in https://github.com/python/cpython/pull/117372/files and https://github.com/python/cpython/pull/117371/files

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

[Eclips4]

Ah, already solved by #117373 :)