1819530 - Firefox crashes on Sway with display scale set to 2 when moving tabs with gfx.webrender.compositor.force-enabled set to true

Status: UNCONFIRMED

(Core :: Graphics: WebRender, defect)

Description

[Christopher]

Attachment: firefox.log

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/112.0

Steps to reproduce:

1. Set display scale to 2 in Sway with "output DP-2 pos 0 0 mode 3840x2160@60Hz scale 2"
2. Run firefox nightly with gfx.webrender.compositor.force-enabled set to true
3. Attempt to move a tab with the mouse

Actual results:

Firefox crashes instantly when attempting to move the tab. I have attached a log file with WAYLAND_DEBUG=1 set, but the relevant lines appear to be here

[ 968631.390] [e-mail](wl_surface@230, 2, "Buffer size (1x1) is not divisible by scale (2)")
ExceptionHandler::GenerateDump cloned child ExceptionHandler::WaitForContinueSignal waiting for continue signal...
2894745
ExceptionHandler::SendContinueSignalToChild sent continue signal to child
[ 968690.255] -> [e-mail]()
[ 968690.276] -> [e-mail]()
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.

When I disable scaling on the monitor no such crash occurs.

Expected results:

Firefox should not crash.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Graphics: WebRender' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:gw, could you have a look please?

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