229874 2021-09-03 09:07:01 -0700 [ iOS EWS ] imported/w3c/web-platform-tests/css/css-sizing/percentage-height-in-flexbox.html is a flaky failure 2021-09-03 15:55:46 -0700 1 1 1 Unclassified WebKit CSS WebKit Nightly Build iPhone / iPad Unspecified NEW InRadar P2 Normal --- 1 ayumi_kojima webkit-unassigned cdumez koivisto simon.fraser thorton webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1790191 0 ayumi_kojima 2021-09-03 09:07:01 -0700 imported/w3c/web-platform-tests/css/css-sizing/percentage-height-in-flexbox.html Is a flaky failure on iOS-14-Simulator-WK2-Tests-EWS. The flaky failure is not showing up in the open source directory: https://results.webkit.org/?suite=layout-tests&test=imported/w3c/web-platform-tests/css/css-sizing/percentage-height-in-flexbox.html The flakiness started at https://ews-build.webkit.org/#/builders/51/builds/16024. Diff: --- /Volumes/Data/worker/iOS-14-Simulator-WK2-Tests-EWS/build/layout-test-results/imported/w3c/web-platform-tests/css/css-sizing/percentage-height-in-flexbox-expected.txt +++ /Volumes/Data/worker/iOS-14-Simulator-WK2-Tests-EWS/build/layout-test-results/imported/w3c/web-platform-tests/css/css-sizing/percentage-height-in-flexbox-actual.txt @@ -1,5 +1,5 @@ -PASS #target offsetSize matches #container offsetSize -PASS #target offsetSize matches #container offsetSize after resize +FAIL #target offsetSize matches #container offsetSize assert_equals: expected 50 but got 0 +FAIL #target offsetSize matches #container offsetSize after resize assert_equals: expected 100 but got 0 1790192 1 webkit-bug-importer 2021-09-03 09:07:38 -0700 <rdar://problem/82725820> 1790199 2 ayumi_kojima 2021-09-03 09:24:51 -0700 Marked test expectations: https://trac.webkit.org/changeset/282000/webkit 1790417 3 ayumi_kojima 2021-09-03 15:47:49 -0700 Apparently the test has been flaky failing in the open source directory. I was able to reproduce the failure locally at TOT and r267075 using run-webkit-tests --iterations 50 --exit-after-n-failures 1 imported/w3c/web-platform-tests/css/css-sizing/percentage-height-in-flexbox.html --force --ios-simulator. The test timed out at r267007 and the oldest revision available (r266320). The regression range is between r267008 and r267075, but I wasn't able to pinpoint since there are no testable revisions available in-between.