1474389 - SVG background can bleed into Firefox chrome with Webrender enabled

Status: RESOLVED DUPLICATE of bug 1470855

(Core :: Graphics: WebRender, defect)

Description

[Marco Perez [:mpk]]

Attachment: minimized SVG testcase

User Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:63.0) Gecko/20100101 Firefox/63.0
Build ID: 20180703221211

Steps to reproduce:

1) launch Firefox using a new profile (just to be safe)
2) enable gfx.webrender.all
3) restart Firefox (using the same profile)
4) load the attached minimized SVG testcase
5) resize browser window (width>=911px, height>=985px)

Please note that this was tested on a PC with Intel SandyBridge, running FreeBSD 11-stable and a current trunk build. Other platforms may also be affected, though.


Actual results:

Part of the content's red background starts "seeping" into the space to the right of the tabs.


Expected results:

I don't think that's intended... :-(

Comment 1

[Marco Perez [:mpk]]

Attachment: screenshot depicting the problem

Launching Firefox in safe mode prevents the bug from manifesting, as does running with gfx.webrender.all disabled. The window also needs to be large enough to trigger the bug. When running fullscreen, the space next to the tabs is completely red.

Comment 2

[Darkspirit]

(In reply to Marco Perez from comment #0)
> Build ID: 20180703221211

Thank you. This should be fixed in a recent Nightly.

Install theme, maximize window.
mozregression --find-fix --bad 2018-07-03 --good 2018-07-09 --pref gfx.webrender.all:true startup.homepage_welcome_url:'https://addons.mozilla.org/en-US/firefox/addon/starry-space-fantasy/|https://bug1474389.bmoattachments.org/attachment.cgi?id=8990785'
> 6:45.35 INFO: First good revision: 860f77039bdf01e87ee2af958948e71448027e74
> 6:45.35 INFO: Last bad revision: e672ba38c0a4750468a2927be9ffa88bac4b002d
> 6:45.35 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=e672ba38c0a4750468a2927be9ffa88bac4b002d&tochange=860f77039bdf01e87ee2af958948e71448027e74

> 17c971ee792c	Kartikaya Gupta — Bug 1471874 - Update webrender to commit 34a498f7e46c385a189299e7369e204e1cb2060c. r=Gankro