1524920 - CSS not rendering correctly in Firefox Developer Edition 66.0b4 (64-bit) OSX

Status: RESOLVED DUPLICATE of bug 1524966

(Core :: Graphics, defect)

Description

[Ben]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

Visit http://circle.firchow.net/

Actual results:

The percentage circles are not displayed correctly in Firefox Developer Edition 66.0b4 (64-bit) OSX. Specifically, 25,33 & 50% all show as 0%, while 66, 75 & 100% all show as 50%. I realise this sounds like a CSS issue, not Firefox issue, but ...

They were displayed correctly in the last version of Firefox Developer Edition and are currently displayed correctly in Firefox 65.0 (64-bit) OSX, as well as Chrome and Safari. This leads me to believe that there is a bug in the 66.0b4 version CSS rendering.

Expected results:

The correct percentages should be displayed.

Comment 1

[Alice0775 White]

[Tracking Requested - why for this release]:

I can also reproduce the issue on Nightly67.0a1 Windows10 With/Without WebRender, but not on Firefox64.0.

Regression window:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=717a8fb8b842276af0a62b021ac3cf42833659ca&tochange=0026b863c4371ed9856e27b31fb1a61d7ce1e42b

Regressed by: Bug 1514384

Comment 2

[Ben]

Hopefully useful info - this seems to be related to the css clip property

Comment 3

[Marcia Knous [:marcia]]

Changing 66 to affected instead of fix optional.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

The patch in bug 1524966 also fixes this. Thanks a lot for the report :)

Comment 5

[Liz Henry (:lizzard) (relman/hg->git project)]

This will be tracked in bug 1524966 but I'll keep an eye on this too until the fix lands and we can verify it.