Bug 238519 – REGRESSION: [ iOS ] animations/shadow-host-child-change.html is a flaky image failure

• Status: NEW
• Component: Animations

[Dawn Morningstar]

animations/shadow-host-child-change.html 
is a flaky image failure on iOS queues.

Suspected regression point r290898, as is only revision in range that modifies animations.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=animations%2Fshadow-host-child-change.html

DIFF-URL:
https://build.webkit.org/results/Apple-iPadOS-15-Simulator-Debug-WK2-Tests/r291968%20(1280)/animations/shadow-host-child-change-diffs.html

DIFF-Images will be attached.

[Radar WebKit Bug Importer]

<rdar://problem/91000362>

[Dawn Morningstar]

Created attachment 456054 [details]
Diffs for animations/shadow-host-child-change.html

[Dawn Morningstar]

Marking expectations until further investigation can occur

[Dawn Morningstar]

(In reply to Matteo Flores from comment #3)
> Marking expectations until further investigation can occur

Expectations marked in r292061

[Antoine Quint]

There is no chance r290898 is involved in this.

[Dawn Morningstar]

(In reply to Antoine Quint from comment #5)
> There is no chance r290898 is involved in this.

Thanks for taking a look! 
Today I will attempt to reproduce locally and bisect an exact point.

[Dawn Morningstar]

Unable to bisect as when attempting newer spades I receive ('Failed to install app {} on device {}'.format(self._path_to_driver(), device.udid)) 

At r291781 the test passes at 1000 iterations using run-webkit-tests --ios-simulator