bug#39598: 26.3; Emacs is extremely unresponsive on a trivial python file

[Lars Ingebrigtsen]

Noam Postavsky <npostavs@gmail.com> writes:

> So any repetitions of the while loop after the second one are useless.
> The patch (generated with --ignore-all-space) below fixes it:
>
> --- c/lisp/progmodes/python.el
> +++ i/lisp/progmodes/python.el
> @@ -5135,7 +5135,8 @@ python-info-docstring-p
>               (>=
>                2
>                (let (last-backward-sexp-point)
> -                (while (save-excursion
> +                (while (and (<= counter 2)
> +                            (save-excursion

There wasn't any discussion of this patch, but it seems to fix the
problem and doesn't introduce any obvious regressions that I can see, so
I've applied it to Emacs 28.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no