1720796 - [Linux] [Wayland] Special characters disappearing when using <code> tag in HTML

Status: UNCONFIRMED

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

Description

[TheEvilSkeleton]

Attachment: tilde.mp4

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0

Steps to reproduce:

I zoomed completely with pinch-to-zoom.

Actual results:

Special characters magically disappear when partially zoomed or completely zoomed using pinch-to-zoom on Wayland.

Expected results:

Special characters should stay and not disappear.

Additional Details

• Firefox and desktop should be running on Wayland, so with the MOZ_ENABLE_WAYLAND=1 environment.
• I tried using a brand new profile, and it's reproducible on it.
• Some special characters I tested are ~, *, [ and ].
• Website I used: https://theevilskeleton.frama.io/2021/07/10/linux-jekyll-toolbox-container.html
• HTML source of page: https://framagit.org/-/snippets/6262
• CSS of website: https://framagit.org/TheEvilSkeleton/theevilskeleton.frama.io/-/tree/13942f3229c7c8db826d3cd711908ffce0a419f8/css

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Martin Stránský [:stransky] (ni? me)]

Please attach your about:support. Also please test latest nightly:
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Testing_Mozilla_binaries
Thanks.

Comment 3

[TheEvilSkeleton]

Attachment: troubleshooting.log

Ran MOZ_ENABLE_WAYLAND=1 ./firefox -ProfileManager -no-remote and retrieved the logs from about:support.

Comment 4

[Martin Stránský [:stransky] (ni? me)]

Thanks. Can you try to disable WebRender? How-to is here:
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems?rd=Bug_info_Firefox#Check_WebRender
Thanks.

Comment 5

[TheEvilSkeleton]

I disabled it, and it wasn't reproducible.

Comment 6

[Dzmitry Malyshau [:kvark]]

Already blocking "wayland", and doesn't look urgent. Thanks Martin for early triage!

Comment 7

[Dzmitry Malyshau [:kvark]]

I do wonder what's so special about these characters though that makes them disappear but not the other things.

Comment 8

[TheEvilSkeleton]

Same.