Bug 37993 – Assertion failure in AnimationBase::updateStateMachine() coming out of paused state

• Status: RESOLVED
• Resolution: FIXED
• Component: CSS

[Chris Marrin]

This is rare and hard to reproduce, but if you go into pause state when in the AnimationStateStartWaitStyleAvailable, the state of m_pauseTime is incorrect, leading to an assert when coming out of pause state.

[Chris Marrin]

It's actually easy to reproduce, but you have to use the "pause API" (a feature available in LayoutTests) to get it to happen. You simply run a debug build, start a transition and then pause and unpause. The assert is usually hit. I will try to post a test.

[Chris Marrin]

It's actually easy to reproduce, but you have to use the "pause API" (a feature available in LayoutTests) to get it to happen. You simply run a debug build, start a transition and then pause and unpause. The assert is usually hit. I will try to post a test.

[Chris Marrin]

Created attachment 62236 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 62236 [details]
Patch

> Index: WebCore/ChangeLog
> ===================================================================

> +        https://bugs.webkit.org/show_bug.cgi?id=37993

The bug title should be on the line above the url ("webkit-patch upload" will do this for you).

r=me

[Chris Marrin]

Patch landed in http://trac.webkit.org/changeset/63862

[Csaba Osztrogonác]

After this patch animations/play-state.html is flakey on Qt bot:
http://build.webkit.org/results/Qt%20Linux%20Release/r63884%20%2815890%29/animations/play-state-pretty-diff.html

Could you check what the problem is?