bug#18997: 24.4; IDLWAVE: Emacs crashes when trying to change the window while in the IDL shell

[Eli Zaretskii]

> Date: Thu, 12 Nov 2015 12:35:59 -0800
> From: Gordon Farquharson <gordonfarquharson@gmail.com>
> Cc: Glenn Morris <rgm@gnu.org>, 18997@debbugs.gnu.org
> 
> I built emacs from the git repository
> (1e363a8ea5ac09455f3a44fbb646b5af32bca51c). WIth IDLWAVE upsteam, and the
> changes to the idlw-toolbar.el file to make the icons 24 x 24 pixels and the
> colors 8 bit triplets (#000000), emacs doesn't abort, but the icons are just A
> (as reported by Glenn). The bit_per_sample assertion in
> gdk_pixbuf_new_from_data still fails.

So what in those icons cause the problem?

If you entirely replace those images with contents of files in
etc/images/, does the problem still persist?  If so, does it mean we
have problems with the GTK toolbar in other modes, like Gnus and GUD?