bug#42522: closed (Emacs 27: 100% CPU when setting mode-name with ligatures)

[GNU bug Tracking System]

Your message dated Thu, 13 Aug 2020 09:54:50 -0700
with message-id 
<CADwFkmkDcbffnD6BfEoS637aWKdO9kTkakjP5iem6ZnXESRMXQ@mail.gmail.com>
and subject line Re: bug#42522: Emacs 27: 100% CPU when setting mode-name with 
ligatures
has caused the debbugs.gnu.org bug report #42522,
regarding Emacs 27: 100% CPU when setting mode-name with ligatures
to be marked as done.

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help-debbugs@gnu.org.)


-- 
42522: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=42522
GNU Bug Tracking System
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--- Begin Message --- Subject: Emacs 27: 100% CPU when setting mode-name with ligatures Date: Fri, 24 Jul 2020 14:35:50 -0700

Emacs version: GNU Emacs 27.0.91 (build 1, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G5033)) of 2020-07-24

Built d5acc509415869bce22c49ae311f2960494a0bdc locally

To reproduce, evaluate this

(set-char-table-range composition-function-table 47 '([".\\(?:\\(?:\\*\\*\\|//\\|==\\)\\|[*/=>]\\)" 0 font-shape-gstring]))

And then evaluate

(setq mode-name "test//")

Emacs will become unresponsive and consume 100% CPU.

--

Evan Moses
emoses@gmail.com

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#42522: Emacs 27: 100% CPU when setting mode-name with ligatures
>
>
>
>
> Date: 
>
> Thu, 13 Aug 2020 09:54:50 -0700
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>
>
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> Evan Moses <emoses@gmail.com> writes:
>
> > Seems to work fine now; Thanks!
>
> Thanks.  I'm therefore closing this bug report.
>
> Best regards,
> Stefan Kangas
>
>
> --- End Message ---