1234804 - Firefox 43 fails to visualize correctly an animated gif

Status: RESOLVED DUPLICATE of bug 1234077

(Core :: Graphics: ImageLib, defect)

Description

[alpiturchi]

Attachment: Example gif file where rendering badly fails

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID: 20151210084639

Steps to reproduce:

Try to load some animated gif.
The issue happens with few gif files for reasons unknown to me.
The gif seems corretly made, since other programs and browsers are able to correctly visualize it.

I tried with the following browsers:
Firefox 43 on linux (Xubuntu 64bit) --> Fails
Firefox 43 on MacOs (El Capitan) --> Fails
Firefox 40 on Linux (Ubuntu 64 bit) --> Works
Chrome on either Linux or MacOs --> Works
Safari on MacOs --> Works

Since this problem seems to happen only with Firefox 43 it seems it is a regression issue.
I attached a test animated gif file that shows the problem.


Actual results:

Gif is badly rendered and deformed


Expected results:

Gif is corretcly rendered

Comment 1

[Alice0775 White]

[Tracking Requested - why for this release]: break web page du to regression


Regression window:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=e276d93dfe4d1018c13d1e310166ace5e011f057&tochange=63c676ad8d86a39e62c39761f7c78b77b66cfc4e

Suspect;
a69d71324577	Edwin Flores — Bug 1223465 - Clamp GIF frame rects to their screen rects - r=seth

Comment 3

[Sylvestre Ledru [:Sylvestre]]

Tracked in the duplicate