289005 2025-03-03 14:17:06 -0800 REGRESSION(291130@main?): [ iOS ] imported/w3c/web-platform-tests/css/css-anchor-position/anchor-scroll-position-try-006.html is a constant failure. 2025-03-05 08:55:23 -0800 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 y_karimi webkit-unassigned koivisto webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2100034 0 y_karimi 2025-03-03 14:17:06 -0800 imported/w3c/web-platform-tests/css/css-anchor-position/anchor-scroll-position-try-006.html This test is a constant failure on iOS. HISTORY: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-anchor-position%2Fanchor-scroll-position-try-006.html TEXT DIFF: @@ -1,6 +1,6 @@ -FAIL Should use the last fallback position initially assert_equals: Anchored element should be at the top of anchor expected 600 but got 800 -FAIL Should use the third fallback position with enough space below assert_equals: Anchored element should be at the bottom of anchor expected 450 but got 700 -FAIL Should use the second fallback position with enough space right assert_equals: Anchored element should be at the top of anchor expected 450 but got 800 -FAIL Should use the first fallback position with enough space below and right assert_equals: Anchored element should be at the bottom of anchor expected 450 but got 700 +PASS Should use the last fallback position initially +FAIL Should use the third fallback position with enough space below assert_equals: Anchored element should be at the bottom of anchor expected 450 but got 500 +FAIL Should use the second fallback position with enough space right assert_equals: Anchored element should be at the top of anchor expected 450 but got 600 +FAIL Should use the first fallback position with enough space below and right assert_equals: Anchored element should be at the bottom of anchor expected 550 but got 500 DIFF URL: https://build.webkit.org/results/Apple-iPadOS-18-Simulator-Release-WK2-Tests/291510@main%20(485)/imported/w3c/web-platform-tests/css/css-anchor-position/anchor-scroll-position-try-006-pretty-diff.html REPRODUCIBILITY: I was able to reproduce this issue on the iOS 18.2 simulator at ToT using the following command: run-webkit-tests --ios-simulator --child-processes 2 -f imported/w3c/web-platform-tests/css/css-anchor-position/anchor-scroll-position-try-006.html --iterations 5 REGRESSION: According to the results dashboard and contextual information, the probable regression point is 291130@main. The code paths changed in this commit appear to be related to the observed regression test failure. This test was a flaky failure and became a constant failure after 291123@main. 2100035 1 webkit-bug-importer 2025-03-03 14:17:17 -0800 <rdar://problem/146052560> 2100037 2 ews-feeder 2025-03-03 14:30:46 -0800 Test gardening commit 291524@main (4ca4492bd5ad): <https://commits.webkit.org/291524@main> Reviewed commits have been landed. Closing PR #41804 and removing active labels. 2100552 3 koivisto 2025-03-05 00:55:23 -0800 gardening was the right fix here