bug#16128: 24.3.50; SIGSEGV at font.c:2901 : eassert (FRAME_DISPLAY_INFO (font->frame)->n_fonts);

[Eli Zaretskii]

> From: Jan Djärv <jan.h.d@swipnet.se>
> Date: Sat, 14 Dec 2013 12:26:15 +0100
> Cc: Dmitry Antipov <dmantipov@yandex.ru>,
>  theonewiththeevillook@yahoo.fr,
>  16128@debbugs.gnu.org
> 
> >> While that made sense at the time tooltips was implemented in Emacs, it no 
> >> longer does.  Tooltips should adopt the look and feel of the desktop 
> >> environment, which is why GTK left the tooltip-is-a-frame concept.
> > 
> > What can I say? volunteers are welcome, as always.
> 
> For some Gnome desktops, the look and feel of the tooltips is patched in to 
> the libGtk+ library and not accessable if you compile Emacs without Gtk+.  
> This is not the standard libGtk+, it is a patched version, patched by Ubuntu 
> or Fedora or some other distribution. Things like transparency and 
> fore/background colors are hardcoded into the library.  So volunteers does 
> not help.

I meant any toolkit that supports tooltips on its own.  When Emacs is
built with a toolkit that does not support tooltips, then we have no
choice but to provide them as part of Emacs's own infrastructure.