1446129 - Large element with transform disappears during scrolling

Status: RESOLVED DUPLICATE of bug 1445034

(Core :: Graphics: WebRender, defect)

Description

[Markus Stange [:mstange]]

Attachment: testcase

In this testcase, if I scroll down and then scroll up again, the blue element briefly disappears.

Comment 1

[Markus Stange [:mstange]]

I encountered this on https://extensionschallenge.com/ .

Comment 2

[Darkspirit]

The blue area reappears after a click. I suspect that this has the same cause as bug 1445034.

mozregression --repo autoland --launch cfc5d19e856fc43766669069b7e2695dd519e5c3 --pref gfx.webrender.all:true startup.homepage_welcome_url:"https://bugzilla.mozilla.org/attachment.cgi?id=8959296"
good

mozregression --repo autoland --launch 81f389c2524e58b4b95844667719cc1642573019 --pref gfx.webrender.all:true startup.homepage_welcome_url:"https://bugzilla.mozilla.org/attachment.cgi?id=8959296"
bad

try build from bug 1440664:
> WR @ 992dbd3f07b143f35581012082aa59fbda7c387e
mozregression --repo try --launch 4916bd1bb3e9470ea106ebf45859b68b2a1b474c --pref gfx.webrender.all:true startup.homepage_welcome_url:"https://bugzilla.mozilla.org/attachment.cgi?id=8959296"
bad

Same regression range: https://github.com/servo/webrender/compare/8a19316a733a484bf9bafb8257e3008b1418bfe4...992dbd3f07b143f35581012082aa59fbda7c387e