203449 2019-10-25 21:19:41 -0700 css/css-position/position-relative-table* tests fail 2026-05-08 02:54:17 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified NEW https://bugs.webkit.org/show_bug.cgi?id=203446 https://bugs.webkit.org/show_bug.cgi?id=240961 InRadar P2 Normal --- 1 simon.fraser webkit-unassigned ahmad.saleem792 bfulgham csaavedra ehutchison eric karlcow mrobinson simon.fraser webkit-bot-watchers-bugzilla webkit-bug-importer zalan oldest_to_newest 1584172 0 simon.fraser 2019-10-25 21:19:41 -0700 imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-top.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-top.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-top.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tr-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tr-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tr-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tr-top.html [ ImageOnlyFailure ] 1783442 1 mrobinson 2021-08-11 04:13:07 -0700 Tests newly failing with the latest import: webkit.org/b/203449 imported/w3c/web-platform-tests/css/css-position/position-relative-001.html [ ImageOnlyFailure ] webkit.org/b/203449 imported/w3c/web-platform-tests/css/css-position/position-relative-002.html [ ImageOnlyFailure ] webkit.org/b/203449 imported/w3c/web-platform-tests/css/css-position/position-relative-011.html [ ImageOnlyFailure ] 1785145 2 ehutchison 2021-08-18 09:50:29 -0700 imported/w3c/web-platform-tests/css/css-position/position-relative-003.html imported/w3c/web-platform-tests/css/css-position/position-relative-004.html are also now failing (BigSur, Monterey wk1). 1785147 3 webkit-bug-importer 2021-08-18 09:51:02 -0700 <rdar://problem/82081662> 1785150 4 ehutchison 2021-08-18 09:58:56 -0700 Updated test expectations at http://trac.webkit.org/changeset/281194/webkit. 1785180 5 ehutchison 2021-08-18 11:34:28 -0700 Reproduced test results locally using run-webkit-tests -1 -f --force --iterations 1000 --exit-after-n-failures 1 --clobber-old-results imported/w3c/web-platform-tests/css/css-position/position-relative-004.html on r281186. 2167971 6 csaavedra 2025-12-23 10:19:35 -0800 imported/w3c/web-platform-tests/css/css-position/position-relative-002.html passing for a while in all platforms. 2208862 7 eric 2026-05-07 22:02:57 -0700 The `tr` and `td`-related tests are passing as of TP243. The rest of the list above are not. 2208926 8 karlcow 2026-05-08 02:39:16 -0700 Thanks Eric! The tests still failing are imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tbody-top.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-tfoot-top.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-left-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-left.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-top-absolute-child.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-position/position-relative-table-thead-top.html [ ImageOnlyFailure ] 2208930 9 karlcow 2026-05-08 02:54:17 -0700 Bug 240961 only fixed rows, not sections. Source/WebCore/style/StyleAdjuster.cpp:488-493: https://searchfox.org/wubkat/rev/68f2a0d2a5f6fc91cbfb573ccf94fceaaa2f162c/Source/WebCore/style/StyleAdjuster.cpp#488-493 ```cpp // We do not honor position:relative or position:sticky on table row groups. Table rows are // allowed to be position:relative (they extend RenderBlock and can be proper containing blocks). if ((style.display() == DisplayType::TableHeaderGroup || style.display() == DisplayType::TableRowGroup || style.display() == DisplayType::TableFooterGroup) && style.position() == PositionType::Relative) style.setPosition(PositionType::Static); ``` The position: relative on <tbody>/<thead>/<tfoot> is silently rewritten to static before layout ever sees it, so the green .relative box paints at (0,0) and the red .indicator shows through Bug 240961 (commit 27d1a32af9b1, Apr 2026) fixed the <tr> variants by promoting RenderTableRow from RenderBox to RenderBlock, adding isPositioned() to RenderTableRow::requiresLayer(), and making cells row-relative. The StyleAdjuster guard was narrowed to row groups only as part of that patch.