NEW 206993
Regression: fast/hidpi/image-srcset-relative-svg-canvas-2x.html is consistently failing on iOS EWS 
https://bugs.webkit.org/show_bug.cgi?id=206993
Summary Regression: fast/hidpi/image-srcset-relative-svg-canvas-2x.html is consistent...
Aakash Jain
Reported 2020-01-30 04:58:50 PST
Regression: fast/hidpi/image-srcset-relative-svg-canvas-2x.html is consistently failing on iOS EWS. This test was passing earlier on iOS, since yesterday (Jan 29) it started failing consistently on iOS EWS. First failure in: - Build: https://ews-build.webkit.org/#/builders/24/builds/9513 (the ToT used in this build was r255337) - Result: https://ews-build.webkit.org/results/iOS-13-Simulator-WK2-Tests-EWS/r389098-9513-clean-tree/results.html Recent examples: https://ews-build.webkit.org/#/builders/24/builds/9616 https://ews-build.webkit.org/#/builders/24/builds/9606 https://ews-build.webkit.org/#/builders/24/builds/9604 Seems like a regression from r255331 (Bug 206254: REGRESSION: [ Mac ] fast/hidpi/image-srcset-relative-svg-canvas-2x.html is a flaky failure)
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Aakash Jain
Comment 1 2020-01-30 05:02:10 PST
This issue doesn't seems to be happening on build.webkit.org bots https://results.webkit.org/?suite=layout-tests&test=fast%2Fhidpi%2Fimage-srcset-relative-svg-canvas-2x.html
Radar WebKit Bug Importer
Comment 2 2020-01-30 05:03:12 PST
<rdar://problem/59025405>
Alexey Proskuryakov
Comment 3 2020-01-30 10:02:54 PST
This is an antialiasing diff on circle border.
Alexey Proskuryakov
Comment 4 2020-01-30 10:04:16 PST
This sometimes means that a preceding test changes antialiasing settings, which affects subsequent tests. May be reproducible by running same tests as this single process does on EWS, in the same order.
Ryan Haddad
Comment 5 2020-01-30 15:07:46 PST
Marked as failing in https://trac.webkit.org/changeset/255462/webkit in an attempt to speed up EWS.
Ryan Haddad
Comment 6 2020-01-31 11:27:49 PST
(In reply to Ryan Haddad from comment #5) > Marked as failing in https://trac.webkit.org/changeset/255462/webkit in an > attempt to speed up EWS. I think this caused another test to fail https://bugs.webkit.org/show_bug.cgi?id=207038 We'll need to repro this locally.
Aakash Jain
Comment 7 2020-02-23 05:32:37 PST
Test Expectations for this test were updated again so as to run this in EWS in https://trac.webkit.org/changeset/257091/webkit (See https://bugs.webkit.org/show_bug.cgi?id=207038#c11) This has again started failing on EWS. e.g.: https://ews-build.webkit.org/#/builders/24/builds/11375 https://ews-build.webkit.org/#/builders/24/builds/11373
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