Bug 244297

Summary: [ iOS arm64 ] svg/transforms/transformed-text-fill-gradient.htm is a constant failure
Product: WebKit Reporter: Hercules Hjalmarsson <hhjalmarsson>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: bfulgham, sabouhallawa, simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Diff images none

Description Hercules Hjalmarsson 2022-08-24 09:37:43 PDT
svg/transforms/transformed-text-fill-gradient.html 
 
Is a constant image failure on iOS arm64 release ToT and since 247262@main.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=svg/transforms/transformed-text-fill-gradient.html 

Diff images attached.
Comment 1 Radar WebKit Bug Importer 2022-08-24 09:38:07 PDT
<rdar://problem/99088878>
Comment 2 Hercules Hjalmarsson 2022-08-24 09:42:55 PDT
Created attachment 461842 [details]
Diff images
Comment 3 Hercules Hjalmarsson 2022-08-24 09:43:37 PDT
The regression range is fairly large since the test last passed on 247094@main and started failing on 247262@main without any builds to test on between the two commits.

I'm unable to state that 247262@main is the root cause because of this (most likely isn't).
Comment 4 Hercules Hjalmarsson 2022-08-24 09:45:29 PDT
This issue can be bisected to 247262@main using command: 

run-webkit-tests --release --ios-simulator --iterations=2   svg/transforms/transformed-text-fill-gradient.html
Comment 5 EWS 2022-08-24 10:40:59 PDT
Test gardening commit 253730@main (04883699dd08): <https://commits.webkit.org/253730@main>

Reviewed commits have been landed. Closing PR #3616 and removing active labels.
Comment 6 Hercules Hjalmarsson 2022-08-24 11:04:59 PDT
Worth noting:

This test has been failing for a long time on macOS. I'm not sure if this should be passing on all iOS queues?
Comment 7 Alexey Proskuryakov 2022-08-24 16:18:26 PDT
This test was actually failing on arm64 iOS since it was imported.

Looks like dithering noise in the gradient.