Bug 208601 - REGRESSION (r257840): [ iOS ] fast/backgrounds/hidpi-bitmap-background-on-subpixel-position.html is flaky failing
Summary: REGRESSION (r257840): [ iOS ] fast/backgrounds/hidpi-bitmap-background-on-sub...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: New Bugs (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: zalan
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-03-04 14:00 PST by Jacob Uphoff
Modified: 2020-03-13 13:57 PDT (History)
3 users (show)

See Also:

Attachments
Actual (40.32 KB, image/png)
2020-03-04 14:00 PST, Jacob Uphoff 		no flags Details
Expected (40.33 KB, image/png)
2020-03-04 14:01 PST, Jacob Uphoff 		no flags Details
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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