1619174 - assertion failed: (content_origin_f.y - content_origin.y).abs() < 0.01) at gfx/wr/webrender/src/picture.rs:4679

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P3)

Description

[Hiroyuki Ikezoe (:hiro)]

The debug assertion is here
https://searchfox.org/mozilla-central/rev/a69f60390921e21e1d62d40ce388c44a71db00c6/gfx/wr/webrender/src/picture.rs#4679

Steps to reproduce;

1. Build Fenix with a latest m-c debug build
2. Launch the Fenix
3. Change the toolbar position at top (this is not a mandatory step though)
4. Open planet.mozilla.org
5. Scroll up/down repeatedly

I wanted to output the content_origin values with eprintln! or in the debug_assert, but it didn't appear in adb log.

My best guess is that the tolerant value 0.01 should be dependent on the device_pixel_scale there?

Comment 1

[Jessie [:jbonisteel] pls NI]

Kris, just pinging you to see if this should be triaged differently

Comment 2

[Jamie Nicol [:jnicol] (on leave until 21st October)]

This will hopefully be fixed by bug 1620014. I've certainly hit this assertion several times while debugging that one, but I'm not yet 100% it has the same cause

Comment 3

[Kris Taeleman (:ktaeleman)]

@jnicol: Have you still encountered this?

Comment 4

[Jamie Nicol [:jnicol] (on leave until 21st October)]

I haven't, but nor have I been doing lots of zooming and scrolling of pages with debug builds.. So can't say for sure it's gone

Comment 5

[Hiroyuki Ikezoe (:hiro)]

I tried planet.mozilla.org with the latest build. It seems the assertion no longer happens.