1653413 - URL status bar does not go away immediately, causing overlapping

Status: VERIFIED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Fanolian]

Attachment: URL status bar overlapping.html

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0
Build ID: 20200716094032

Steps to reproduce

1. Open attached testcase.
2. Hover over the first line.
3. Move mouse away from first line and quickly hover over the second line.

Acutal result

First URL is not dismissed, overlapping under second URL.

Expected result

First URL is immediately dismissed and only the second URL is shown.

Note

1. If I reduce the browser window height to very short, the issue cannot be reproduced.
2. Looks like at most 2 URLs will be overlapping with each other.

Comment 1

[Fanolian]

Attachment: [screencast] URL overlapping.mp4

Mozregression:
Last good Nightly: 2020-07-14
First bad Nightly: 2020-07-15
pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d080e46635d3e8b163427f68282611aa6392e59f&tochange=c4186bb32c302ec2c82b3b0323af828ccebe0b48

Bisecting autoland builds:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=a05fbae74197b3e9e69f5e0003026451a82bf9cd&tochange=97f04a5dac7c6cb9daeb1e1d32f38111bb922891

This is regressed by bug 1650984.

Comment 2

[Lee Salzman [:lsalzman]]

Are you using Software WebRender?

Comment 3

[Fanolian]

Attachment: about:support

(In reply to Lee Salzman [:lsalzman] from comment #2)
> Are you using Software WebRender?

No. It's a brand new profile with WebRender enabled by default.

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Comment 4

[Fanolian]

Attachment: Troubleshooting Information.xhtml

(reuploading the about:support page)

(In reply to Lee Salzman [:lsalzman] from comment #2)

Are you using Software WebRender?

No. It's a brand new profile with WebRender enabled by default.
I don't have the pref gfx.webrender.software in about:config as mentioned in bug 1653374.

It's on Win10 1909, Nvidia GTX 760 with driver v446.14.

Comment 5

[Lee Salzman [:lsalzman]]

Attachment: Bug 1653413 - update DCLayerTree surface rects at end of frame. r?gw

Comment 6

[Lee Salzman [:lsalzman]]

Attachment: Bug 1653413 - update DCLayerTree surface rects at end of frame. r?gw

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/98279b68955c
update DCLayerTree surface rects at end of frame. r=gw

Comment 8

[Alexandru Michis [:malexandru]]

https://hg.mozilla.org/mozilla-central/rev/98279b68955c

Comment 12

[Fanolian]

Thanks for the fix.