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bug#53203: Comment with lots of color codes crashes or hangs emacs in sc
From: |
Eli Zaretskii |
Subject: |
bug#53203: Comment with lots of color codes crashes or hangs emacs in scss-mode |
Date: |
Thu, 13 Jan 2022 10:58:34 +0200 |
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Colin <my.old.email.sucked@gmail.com>, 53203@debbugs.gnu.org
> Date: Thu, 13 Jan 2022 08:00:18 +0100
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > It seems to infloop in JIT font-lock, and the culprit seems to be this
> > part of font-lock-keywords:
> >
> > ;; Even though pseudo-elements should be prefixed by ::, a
> > ;; single colon is accepted for backward compatibility.
> > "\\(?:\\(:" (regexp-opt (append css-pseudo-class-ids
> > css-pseudo-element-ids)
> > t)
>
> Trying to understand the regexp used for scss here, I think that bit is
> somewhat innocuous -- it just matches those words.
>
> ;; Even though pseudo-elements should be prefixed by ::, a
> ;; single colon is accepted for backward compatibility.
> "\\(?:\\(:" (regexp-opt (append css-pseudo-class-ids
> css-pseudo-element-ids)
> t)
> "\\|::" (regexp-opt css-pseudo-element-ids t) "\\)"
I posted that because I saw this regexp in the backtrace obtained by
interrupting the infloop.