1840988 - Codepen demo can break the contents of Firefox UI, and break the basic layout assumptions of the page by bleeding content into unexpected areas (str in comment #9)

Status: VERIFIED FIXED

(Core :: Graphics: WebRender, defect, P2)

Description

[Mayank Bansal]

Set gfx.webrender.debug.force-picture-invalidation=TRUE
Go to https://codepen.io/thebabydino/pen/OJvYZrx
In the code-pane, change the values in the "HTML(Pug)" pane :

Current:

• let n3d = 18, nd = 3;

Change to:

• let n3d = 18, nd = 36;

Let the demo re-compile (or force it to recompile using the "run" button at the top of the code-pane)

AR:

1. The address-bar drop-down menu is blank
2. Try resizing the code-pane. The demo bleeds into the code-pane

Can repro in a build from Jan2022. So not a recent regression.

Comment 1

[Mayank Bansal]

Attachment: bandicam 2023-06-29 11-11-02-096.mp4

Comment 2

[Mayank Bansal]

Attachment: about:support

Comment 3

[Bob Hood [:bhood]]

Is this still worthy of an "S2" rating?

Comment 4

[Glenn Watson [:gw]]

Yes, this should stay S2.

Comment 5

[Mayank Bansal]

Regression range:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=b422dd886e036907f35269f381f43785873c5296&tochange=69be3221f49a2acb92b734baf725e19bdf9a4fd9

Potential regressing bugs: bug 1694305, bug 1692250

Comment 6

[Mayank Bansal]

Easier STR:

1. Copy the source code of the attached index.html
2. Go to http://xem.github.io/miniCodeEditor/
3. Paste teh contents in the text-box in the second row.

AR: The rendering of the hexagons bleeds out of the boundary of the iframe.

Comment 7

[Mayank Bansal]

Attachment: index.html

Comment 8

[Mayank Bansal]

Attachment: Firefox Vs Chrome.png

Comment 9

[Mayank Bansal]

Even simpler STR:

1. enable force picture invalidation (gfx.webrender.debug.force-picture-invalidation = true)
2. Open the attached testcase index.html

AR: The minimize/maximize/close buttons will disappear.

Comment 10

[Bob Hood [:bhood]]

Thanks for the updates, Mayank.

Comment 11

[Mayank Bansal]

FWIW, the testcase doesnt repro for me. However, the STR from comment #0 still repro.

Comment 12

[Mayank Bansal]

FWIW, the testcase got fixed by bug 1870803 (same observation as https://bugzilla.mozilla.org/show_bug.cgi?id=1818869#c4).

Comment 13

[Mayank Bansal]

This is fixed in the latest Nightly.

Comment 14

[Ryan VanderMeulen [:RyanVM]]

Sorry, I got a bit confused by comment 12. It sounds like the fixes for this landed more recently than 123.

Comment 15

[Ina Popescu, Desktop QA]

I've replicated this issue using Nightly 116.0a1 on Windows 10 x64 following the STR from Comment 9.
Verified as fixed in the latest Firefox 125.0b4 version on Windows 10 x64, macOS 13, and Ubuntu 22.04, as the issue no longer occurs.