bug#54848: 29.0.50; Emacs doesn't understand certain animated GIFs

[Lars Ingebrigtsen]

With the following gif:

https://quimby.gnus.org/s/CoolZanyHuman-max-1mb.gif

Emacs reports "Error reading GIF data" and then displays a black box.
ImageMagick, Firefox and feh are all able to display it, so it's either
a giflib error or we're calling the functions wrong from Emacs.



In GNU Emacs 29.0.50 (build 8, x86_64-pc-linux-gnu, GTK+ Version 3.24.33, cairo 
version 1.16.0)
 of 2022-04-10 built on xo
Repository revision: 02b521ad7456ae6834b0399ec80f56ee8ca09522
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101003
System Description: Debian GNU/Linux bookworm/sid


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(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no