1223059 - New bug in v. 42 when processing css3 transforms on Mac OS

Status: RESOLVED INVALID

(Core :: Graphics, defect)

Description

[Beckett GmbH]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:42.0) Gecko/20100101 Firefox/42.0
Build ID: 20151029151421

Steps to reproduce:

We have CSS3 transform rotate, which is passed via JavaScript to the graphic hands of an analogue clock (see http://www.apromo.de = Menu -> Agency) which continues to work in all browsers (WIN: FF / IE / Chrome / Opera and MAC: Chrome / Opera / Safari) and upto and including FF 41 on Mac OS (iMac and Macbook with all users quenstioned).


Actual results:

As soon as our FF was updated to the latest 42 version, the animation of the clock hands ist eratic and now blinks, stops and starts. Having tested this in FF 41 where it still works, we can only presume that the 42 has some issue with processing the transform rotate being used in our clock.


Expected results:

The hands of the clock should tick through smoothly and without blinking or the eratic behaviour currently displayed in FF 42 - please view the animation in older versions of FF upto 41 or any other browser to witness how the animation should behave.

Comment 1

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

What was the issue?

I can also reproduce the issue (or a similar one) on Windows 8.1 (64 bit).

good:
20150918030202
https://hg.mozilla.org/mozilla-central/rev/11dc79e232110ba6de5179e46dfbda77b52a88c3

bad:
20150919030207
https://hg.mozilla.org/mozilla-central/rev/4313752f69956ae248bd4e7ff3913c8dd4252698

Changes:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=11dc79e232110ba6de5179e46dfbda77b52a88c3&tochange=4313752f69956ae248bd4e7ff3913c8dd4252698

Is this fallout from bug 1097464? It could be a duplicate of bug 1210784, but that shouldn't affect Firefox 42 on first glance.