286507 2025-01-24 14:42:48 -0800 [ iOS ] compositing/geometry/fixed-position-composited-page-scale-smaller-than-viewport.html is flakily failing. 2026-01-09 13:22:46 -0800 1 1 1 Unclassified WebKit Compositing WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 y_karimi jbedard ben_schwartz jbedard simon.fraser webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2089650 0 y_karimi 2025-01-24 14:42:48 -0800 compositing/geometry/fixed-position-composited-page-scale-smaller-than-viewport.html This test is flakily failing on iOS. HISTORY: https://results.webkit.org/?suite=layout-tests&test=compositing%2Fgeometry%2Ffixed-position-composited-page-scale-smaller-than-viewport.html TEXT DIFF: @@ -5,11 +5,12 @@ PASS rectsBeforeStyleChange.length is 1 PASS rectsBeforeStyleChange.length is rectsAfterStyleChange.length -PASS rectsBeforeStyleChange[0].top is rectsAfterStyleChange[0].top -PASS rectsBeforeStyleChange[0].left is rectsAfterStyleChange[0].left +FAIL rectsBeforeStyleChange[0].top should be 47. Was 46.99999713897705. +FAIL rectsBeforeStyleChange[0].left should be 74. Was 74.0000057220459. PASS rectsBeforeStyleChange[0].width is rectsAfterStyleChange[0].width PASS rectsBeforeStyleChange[0].height is rectsAfterStyleChange[0].height PASS successfullyParsed is true +Some tests failed. TEST COMPLETE DIFF URL: https://build.webkit.org/results/Apple-iPadOS-18-Simulator-Release-WK2-Tests/289317@main%20(266)/editing/selection/ios/selection-moves-between-composited-layers-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 compositing/geometry/fixed-position-composited-page-scale-smaller-than-viewport.html --iterations 15 2089651 1 webkit-bug-importer 2025-01-24 14:42:58 -0800 <rdar://problem/143593144> 2089664 2 ews-feeder 2025-01-24 16:10:25 -0800 Test gardening commit 289373@main (99cc0d3dc30a): <https://commits.webkit.org/289373@main> Reviewed commits have been landed. Closing PR #39523 and removing active labels. 2090741 3 ben_schwartz 2025-01-30 08:41:17 -0800 I suspect this regressed at 282170@main -- that was a pretty big structural change that touches code paths related to this test. I believe that's most likely causing a race condition in a layout tests setting. 2165151 4 jbedard 2025-12-11 10:40:18 -0800 This test appears to be an ImageDiff test, and I don't understand the original analysis from Yasmin. Today, compositing/geometry/fixed-position-composited-page-scale-smaller-than-viewport.html only fails with ImageDiff, if you look at https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=compositing%2Fgeometry%2Ffixed-position-composited-page-scale-smaller-than-viewport.html. When you look into the diffs, it seems like we're not focusing correctly. 2165155 5 jbedard 2025-12-11 10:47:44 -0800 Removing the "Regression" tag because I think this is about taking a snapshot too quickly. I have a speculative fix, which I will upload, but I haven't gotten a chance to validate because I don't have an iOS Simulator handy right this moment. 2165156 6 jbedard 2025-12-11 10:51:03 -0800 Pull request: https://github.com/WebKit/WebKit/pull/55258 2170745 7 ews-feeder 2026-01-09 13:22:43 -0800 Committed 305376@main (6c3e4e8af893): <https://commits.webkit.org/305376@main> Reviewed commits have been landed. Closing PR #55258 and removing active labels.