Bug 208601

Summary:

REGRESSION (r257840): [ iOS ] fast/backgrounds/hidpi-bitmap-background-on-subpixel-position.html is flaky failing

Product:

WebKit

Reporter:

Jacob Uphoff <jacob_uphoff>

Component:

New Bugs

Assignee:

zalan <zalan>

Status:

NEW ---

Severity:

Normal

CC:

webkit-bot-watchers-bugzilla, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Actual	none
Expected	none

Description Jacob Uphoff 2020-03-04 14:00:19 PST

fast/backgrounds/hidpi-bitmap-background-on-subpixel-position.html

This test became a flaky failure after commit r257840

I was able to reproduce this failure by running the test in debug. It does not reproduce on r257839 but it does reproduce on r257840.

History:

https://results.webkit.org/?suite=layout-tests&test=fast%2Fbackgrounds%2Fhidpi-bitmap-background-on-subpixel-position.html&platform=ios

Diffs:

attached.

Comment 1 Jacob Uphoff 2020-03-04 14:00:43 PST

Created attachment 392475 [details]
Actual

Comment 2 Jacob Uphoff 2020-03-04 14:01:00 PST

Created attachment 392476 [details]
Expected

Comment 3 Radar WebKit Bug Importer 2020-03-04 14:01:18 PST

<rdar://problem/60055233>

Comment 4 zalan 2020-03-04 16:30:15 PST

This is very suspicious. I am going check if it is a sim only failure.

Comment 5 Jacob Uphoff 2020-03-06 13:37:03 PST

Set test expectations here: https://trac.webkit.org/changeset/258027/webkit

Comment 6 Jacob Uphoff 2020-03-13 13:57:17 PDT

corrected expectations here: https://trac.webkit.org/changeset/258429/webkit