Closed Bug 1519441 Opened 2 years ago Closed 2 years ago

Slack's "--- Today ---" header doesn't scroll off screen when WebRender is enabled

Categories

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

Unspecified
Windows
defect

Tracking

()

RESOLVED FIXED
mozilla66
Tracking Status
firefox-esr60 --- unaffected
firefox64 --- unaffected
firefox65 --- unaffected
firefox66 --- fixed

People

(Reporter: cpeterson, Assigned: kvark)

References

(Blocks 1 open bug)

Details

(Keywords: regression)

Attachments

(1 file)

This bug is a regression from WebRender bug 1518605.

STR:

  1. Enable WebRender
  2. Load mozilla.slack.com
  3. In a channel with some history, scroll back through the history

RESULT:
The "--- Today ---" or "--- Yesterday ---" banner stays on screen, hovering over the chat text, instead of scrolling off screen.

I bisected this regression to this pushlog:

https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=5420c29d49d60862617a6b0014548eb1c7c814f3&tochange=bd59070a24d72da867cf1531e89e75ffed2848ae

Flags: needinfo?(dmalyshau)
Assignee: nobody → dmalyshau
Priority: -- → P2

Thanks for finding regression! I'll start looking at it now.

Flags: needinfo?(dmalyshau)
This is a follow-up fix to https://github.com/servo/webrender/pull/3251
Accidentally, the reference frame relative offset was applied twice.
Status: NEW → RESOLVED
Closed: 2 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla66
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