1804189 - Opacity transition on SVG element doesn't animate

Status: NEW

(Core :: Web Painting, defect)

Description

[Hiroyuki Ikezoe (:hiro)]

Attachment: t.svg

STR;

1. Open attaching SVG
2. Click somewhere inside the SVG, it will trigger a 1s opacity transition from opacity: 0 to opacity: 1

Actual result;
A blue circle suddenly appears after 1s.

Note that this is SVG specific, this issue doesn't happen on normal elements. And it's not related to "dom.animations.offscreen-throttling" even with disabling "dom.animations.offscreen-throttling" I can see the issue. It is related to OMTA.

Comment 1

[Hiroyuki Ikezoe (:hiro)]

I was suspecting this is an issue in WebRender (picture cache specifically), but this is also happens on the old layer backend. I have totally no idea where the underlying problem is.

Comment 2

[Blake]

mozregression

Last good build: 2019-04-01
First bad build: 2019-04-02

build_date: 2019-04-02
changeset: 48ae682107da10c0d8ffbdf6e1a10771c5fd2e05
pushlog_url: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=70a50fe09a18b2516e9ffdb2083debfab7de720d&tochange=48ae682107da10c0d8ffbdf6e1a10771c5fd2e05

Comment 3

[Alice0775 White]

Regression range from local cache:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=2bca51da9a9aa9fb07d479b5506717b90e415d2f&tochange=c6c69b6aa0fd3f07fcc9667baa9384b32484e0e2

Comment 4

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

Set release status flags based on info from the regressing bug 1539673

Comment 5

[Hiroyuki Ikezoe (:hiro)]

Great! Thank you Alice!

Comment 6

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

Set release status flags based on info from the regressing bug 1539673

Comment 7

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

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

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