1471834 - 3-pane animation tab disappears on certain animations

Status: VERIFIED FIXED

(DevTools :: Inspector: Animations, defect)

Description

[Cristian Fogel [:cfogel]]

Attachment: 3paneInspector_vanishOnAnimationDellay.gif

[Affected versions]:
- Firefox 63.0a1 (2018-06-26), Firefox-61.0a1

[Affected platforms]:
- Win 10x64, macOS 10.13.4, Ubuntu 16.04LTS

[Steps to reproduce]:
1. Launch firefox;
2. access https://developer.mozilla.org/en-US/docs/Web/CSS/animation-delay
3. press F12 on the keyboard, click on inspector tab;
4. Click on the Animations tab in the 3-pane section;
5. Click on the Pick an element from the page button;
6. Click on the circle in the webpage;
7. additional: Pick another animation-delay option/example from the page if it's not animated.

[Expected result]:
- animation is running, UI is not affected;

[Actual result]:
- layout is kept, section is not rendered;

[Regression range]:
- pushlog after mozzregression bisection:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=3d0acce0b1de3581e0c584dd37be696f4bf1bb52&tochange=3f9a70b125f6fb9be2b209159657fd7ae5515c01

- last good: 2018-03-27 23:29:00.861000
changeset b9de00749ad97c4dc013d3973fc1de137009fb5b

- first bad: 2018-03-28 00:11:17.275000
changeset 10822bd8767d98e194b6de36b3bd7d0e819f9252

- Bug 1445825, looks like a possible candidate;

[Additional notes]:
- attached screen-cast with the issue;
- 61.0b13, 60.0.2, 60.0a1(2018-03-01-02-47-24) versions are not affected;

Comment 1

[Gabriel Luong [:gl] (ΦωΦ)]

Making sure you see this Daisuke

Comment 2

[Daisuke Akatsuka (:daisuke)]

Thanks Gabriel.

Hi Cristi,
I could not reproduce this bug on latest Nightly 63.0a1 (2018-07-10).
Could you confirm again?

Comment 3

[Cristian Fogel [:cfogel]]

Hello, 

Awesome stuff, indeed the issue is no longer reproducible after checking 61.0.1, 62.0b7, 62.0b7 63.0a1 (2018-07-10). 
Adding flag for 62, since 62.0b6 was also affected.

Comment 4

[Cristian Fogel [:cfogel]]

Updating status to verified as well.