Bug 219438

Summary:	[ iOS ] fast/canvas/canvas-overflow-hidden-animation.html is a flaky failure
Product:	WebKit	Reporter:	Truitt Savell <tsavell>
Component:	Canvas	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	dino, graouts, kkinnunen, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Truitt Savell 2020-12-02 10:16:14 PST

fast/canvas/canvas-overflow-hidden-animation.html

It looks like the test is failing with a 1 pixel wide yellow boarder around the green square.

I am able to reproduce this locally using command:
run-webkit-tests --iterations 2000 --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --debug-rwt-logging --no-retry --force --no-build -f --ios-simulator fast/canvas/canvas-overflow-hidden-animation.html

History:
https://results.webkit.org/?suite=layout-tests&test=fast%2Fcanvas%2Fcanvas-overflow-hidden-animation.html

Diff:
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r270345%20(1086)/fast/canvas/canvas-overflow-hidden-animation-diffs.html

Comment 1 Radar WebKit Bug Importer 2020-12-02 10:16:32 PST

<rdar://problem/71899754>

Comment 2 Truitt Savell 2020-12-02 15:12:37 PST

Marked test as failing in https://trac.webkit.org/changeset/270374/webkit

Comment 3 Kimmo Kinnunen 2021-03-18 02:47:58 PDT

Happens on macOS too.

Comment 4 Antoine Quint 2021-04-08 05:40:18 PDT

The last failure was on March 18, 3 weeks ago today, on iOS 14 Simulator wk2 Release on iPhone SE (1st generation) with x86_64. Before that it was March 16, 15 and 11 on the same bot.