1207933 - Animation on transform property has weird behavior when mouse moves

Status: RESOLVED DUPLICATE of bug 1206418

(Core :: Layout, defect)

Description

[Xidorn Quan [:xidorn] UTC+11]

Attachment: testcase

Steps to reproduce:
1. open the attached testcase
2. move mouse in the content area

Expected result:
the green block should keep going up and down in the same horizontal position

Actual result:
the green block may accidentally moves to the leftmost when mouse moves


I can reproduce this on the latest Nightly on Windows, and it happens in both e10s window and non-e10s window.

If I set layers.offmainthreadcomposition.async-animations to false, everything goes fine.

This bug affects the fullscreen warning box.

Comment 1

[Alice0775 White]

Regression window:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=7641104770a80015e63597b58cb312fefcbd9ab4&tochange=621ab19e86db

regressed by: bug 1097464

Comment 2

[Toshihiro Yamada]

As far as I tested, a patch in the Bug 1206418 fixes this.

Comment 4

[Xidorn Quan [:xidorn] UTC+11]

Bug 1097464 has been backed out in aurora, so 43 is not affected now.

Comment 5

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This is probably related to mouse movement because of the problem described in bug 1179535.