1438739 - regression: when scrolling, sometimes content is displayed after a delay

Status: RESOLVED DUPLICATE of bug 1437374

(Core :: Web Painting, defect)

Description

[Darkspirit]

Attachment: 2018-02-16_03-09-32.mp4

Nightly 60 x64 @ Debian Testing (KDE, Radeon RX480)

See attached video.

1. Reduce the window height to the bottom of the video
2. Wait until everything has loaded
3. click on the burger menu and repeatedly scroll down + up by mousewheel

mozregression --good 2017-12-01 --bad 2018-02-15 --pref startup.homepage_welcome_url:"https://www.youtube.com/watch?v=ZUn64eKKQg0"
> 14:40.68 INFO: Last good revision: a20dc29e502d8b74a1fca9195154d895d7de9ec0
> 14:40.68 INFO: First bad revision: 3403b5f669d1395097f26c69c514e52d302a3ec0
> 14:40.68 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=a20dc29e502d8b74a1fca9195154d895d7de9ec0&tochange=3403b5f669d1395097f26c69c514e52d302a3ec0

-> two possible bugs (2018-02-08)

testing this one:
> 24cf388d5d5b	Matt Woodrow — Bug 1429932 - Part 7: Restrict dirty regions in ComputeRebuildRegion to the overflow area of the current frame so that we discard invalidations that aren't visible. r=miko
mozregression --repo autoland --launch 24cf388d5d5b --pref startup.homepage_welcome_url:"https://www.youtube.com/watch?v=ZUn64eKKQg0"
-> bad

Comment 1

[Darkspirit]

Oh.

I think I can't reproduce this with layout.display-list.retain;false.

Fixed in inbound build from bug 1437374 comment 11:
mozregression --repo inbound --launch 8a15c2c921d8 --pref startup.homepage_welcome_url:"https://www.youtube.com/watch?v=ZUn64eKKQg0"

Thanks!