bug#41957: closed (27.0.91; overlay-put freeze with auto-composition-mode ligatures)

[GNU bug Tracking System]

Your message dated Sat, 20 Jun 2020 09:52:38 +0300
with message-id <83tuz6w7nt.fsf@gnu.org>
and subject line Re: bug#41957: 27.0.91; overlay-put freeze with 
auto-composition-mode ligatures
has caused the debbugs.gnu.org bug report #41957,
regarding 27.0.91; overlay-put freeze with auto-composition-mode ligatures
to be marked as done.

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-- 
41957: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=41957
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> --- Begin Message ---
>
>
>
> Subject: 
>
> 27.0.91; overlay-put freeze with auto-composition-mode ligatures
>
>
>
>
> Date: 
>
> Fri, 19 Jun 2020 17:05:30 -0400
>
>
>
>
> It seems that when putting the after-string property to an overlay, if
> auto-composition-mode is enabled and the string contains a ligature,
> Emacs freezes in overlay-put.
>
> The below code freezes when starting with emacs -Q:
>
>
>     (auto-composition-mode)
>     (set-char-table-range composition-function-table ?= `(["=>" 0 
> compose-gstring-for-graphic]))
>     (let ((o (make-overlay (point-min) (+ (point-min) 3) (current-buffer))))
>       (overlay-put o 'after-string "=>"))
>
> If auto-composition-mode is disabled or the string doesn't contain any 
> ligatures, it works as expected.
>
> Additionally, if I create the overlay then enable auto-composition-mode 
> afterwards, it then freezes.
>
> In GNU Emacs 27.0.91 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo 
> version 1.15.10)
>  of 2020-06-17 built on gonk
> Repository revision: c36c5a3dedbb2e0349be1b6c3b7567ea7b594f1c
> Repository branch: HEAD
> Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
> System Description: Ubuntu 18.04.4 LTS
>
> Configured using:
>  'configure --with-xwidgets --with-cairo'
>
> Configured features:
> XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
> INOTIFY GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB
> TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS
> LIBSYSTEMD JSON PDUMPER LCMS2 GMP
>
> Important settings:
>   value of $LANG: en_CA.UTF-8
>   value of $XMODIFIERS: @im=ibus
>   locale-coding-system: utf-8-unix
>
> Memory information:
> ((conses 16 2130544 1191815)
>  (symbols 48 73065 806)
>  (strings 32 1403710 33264)
>  (string-bytes 1 60271301)
>  (vectors 16 387820)
>  (vector-slots 8 5073825 225022)
>  (floats 8 91573 10867)
>  (intervals 56 39918 6792)
>  (buffers 1000 121))
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#41957: 27.0.91; overlay-put freeze with auto-composition-mode ligatures
>
>
>
>
> Date: 
>
> Sat, 20 Jun 2020 09:52:38 +0300
>
>
>
>
> > From: "James N. V. Cash" <james.nvc@gmail.com>
> > Date: Fri, 19 Jun 2020 17:05:30 -0400
> > 
> > It seems that when putting the after-string property to an overlay, if
> > auto-composition-mode is enabled and the string contains a ligature,
> > Emacs freezes in overlay-put.
> > 
> > The below code freezes when starting with emacs -Q:
> > 
> > 
> >     (auto-composition-mode)
> >     (set-char-table-range composition-function-table ?= `(["=>" 0 
> > compose-gstring-for-graphic]))
> >     (let ((o (make-overlay (point-min) (+ (point-min) 3) (current-buffer))))
> >       (overlay-put o 'after-string "=>"))
>
> Thanks, this is a known bug that is already fixed on the master
> branch, and will be available in Emacs 28.
>
>
> --- End Message ---