Bug 217690 – REGRESSION (iOS 14): [ iOS wk2 ] 12 2d.gradient.radial WPT tests are a flaky failure

• Component: New Bugs
• Status: RESOLVED INVALID

[Karl Rackler]

Description:
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.cylinder.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.front.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.top.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.inside1.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.inside2.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.inside3.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.outside1.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.outside2.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.outside3.html
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.touch2.html

I do not see a flaky failure appearing on the dashboard at any point since iOS 14 introduction, but layout test results indicates they are tests failed diff.
All the tests have the same diff log.

I attempted to reproduce with the same spade revision as the layout test results, but could not not.

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.cone.bottom.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.cone.cylinder.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.cone.front.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.cone.shape1.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.cone.top.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.inside1.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.inside2.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.inside3.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.outside1.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.outside2.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.outside3.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Ffill-and-stroke-styles%2F2d.gradient.radial.touch2.html&platform=ios&limit=50000



Diff Log:
imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.bottom.html
--- build/OpenSource/layout-test-results/imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.bottom-expected.txt
+++ build/OpenSource/layout-test-results/imported/w3c/web-platform-tests/html/canvas/element/fill-and-stroke-styles/2d.gradient.radial.cone.bottom-actual.txt
@@ -3,5 +3,5 @@
 Expected output:
 
 
-FAIL Canvas test: 2d.gradient.radial.cone.bottom assert_equals: Green channel of the pixel at (98, 25) expected 255 but got 254
+PASS Canvas test: 2d.gradient.radial.cone.bottom

[Radar WebKit Bug Importer]

<rdar://problem/70274719>

[Karl Rackler]

I have marked these tests as skip while this issue is investigated.
https://trac.webkit.org/changeset/268441/webkit

[Karl Rackler]

Reverted r268441 for reason:

This reverts commit r268441 made in error.

Committed r268450: <https://trac.webkit.org/changeset/268450>

[Karl Rackler]

This bug was made in error.  Please disregard.  Closing.