240037 2022-05-03 14:06:38 -0700 [ iOS ] css3/background/background-repeat-space-content.html is a flaky image failure 2022-05-03 16:44:58 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified NEW https://bugs.webkit.org/show_bug.cgi?id=238965 InRadar P2 Normal --- 1 rackler rackler ap simon.fraser webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1866236 0 rackler 2022-05-03 14:06:38 -0700 Description: css3/background/background-repeat-space-content.html The first failure that I saw on the dashboard was 12/14/2021 at r287060, but this does not appear relevant to causing this issue. This test seems to have been flaky since the start. History: https://results.webkit.org/?suite=layout-tests&test=css3%2Fbackground%2Fbackground-repeat-space-content.html&platform=ios&limit=50000 Image Diff: https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-WK2-Tests/250205@main%20(2446)/css3/background/background-repeat-space-content-diffs.html 1866237 1 webkit-bug-importer 2022-05-03 14:06:56 -0700 <rdar://problem/92692179> 1866241 2 rackler 2022-05-03 14:08:36 -0700 I have marked this test as a flaky image failure while this issue is investigated. 1866245 3 rackler 2022-05-03 14:15:00 -0700 Pull request: https://github.com/WebKit/WebKit/pull/480 1866247 4 ews-feeder 2022-05-03 14:19:26 -0700 Test gardening commit r293739 (250227@main): <https://commits.webkit.org/250227@main> Reviewed commits have been landed. Closing PR #480 and removing active labels. 1866260 5 simon.fraser 2022-05-03 14:53:42 -0700 r293447 didn't fix this? 1866269 6 simon.fraser 2022-05-03 15:04:29 -0700 For cases like this where the pixel differences are consistent, we should be using pixel tolerance to make them pass. Example: r288449 1866302 7 rackler 2022-05-03 16:40:53 -0700 REPRODUCTION STEPS I can reproduce this on ToT (r293740). Command: run-webkit-tests --root 293740 --ios-simulator --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --details --debug-rwt-logging --pixel-tests --tolerance 0.10 --iterations 2000 --no-retry css3/background/background-repeat-space-content.html Result: Unexpected flakiness: image-only failures (1) css3/background/background-repeat-space-content.html [ ImageOnlyFailure Pass ] 1866304 8 ap 2022-05-03 16:44:53 -0700 How can this be flaky? We are just drawing the same circle.png in both actual and expected.