307582 2026-02-11 12:14:14 -0800 REGRESSION(307212@main): [iOS] compositing/overflow/rtl-scrollbar-layer-positioning.html is a constant text failure 2026-05-07 17:44:36 -0700 1 1 1 Unclassified WebKit Compositing WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P1 Normal --- 1 d_delatoba fantasai.bugs dpino fantasai.bugs simon.fraser webkit-bot-watchers-bugzilla webkit-bug-importer zalan oldest_to_newest 2180405 0 d_delatoba 2026-02-11 12:14:14 -0800 compositing/overflow/rtl-scrollbar-layer-positioning.html is a constant text failure. Regression at 307212@main verified via bisection. HISTORY: https://results.webkit.org/?suite=layout-tests&test=compositing%2Foverflow%2Frtl-scrollbar-layer-positioning.html TEXT DIFF: --- /Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-WK2-Tests/build/layout-test-results/fast/css/target-fragment-match-expected.txt +++ /Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-WK2-Tests/build/layout-test-results/fast/css/target-fragment-match-actual.txt @@ -5,5 +5,5 @@ RenderBody {BODY} at (8,16) size 784x20 RenderBlock {DIV} at (0,0) size 784x20 RenderBlock {P} at (0,0) size 784x20 - RenderText {#text} at (0,0) size 624x19 + RenderText {#text} at (0,0) size 624x20 text run at (0,0) width 624: "I should be highlighted first because of the anchor, and de-highlighted when there is no fragment." DIFF URL: https://build.webkit.org/results/Apple-iOS-26-Simulator-Debug-WK2-Tests/307245%40main%20(703)/fast/css/target-fragment-match-pretty-diff.html REPRODUCTION: I was able to reproduce this failure on an iPhone 12 simulator running iOS 26.2 ToT with the following: run-webkit-tests --ios-simulator --child-processes=1 --no-retry --exit-after-n-failures=5 --iterations 100 compositing/overflow/rtl-scrollbar-layer-positioning.html I am going to mark expectations as fail while this pends investigation. 2180406 1 webkit-bug-importer 2026-02-11 12:14:22 -0800 <rdar://problem/170165781> 2180412 2 d_delatoba 2026-02-11 12:21:45 -0800 CORRECTED DIFF AND URL: https://build.webkit.org/results/Apple-iOS-26-Simulator-Debug-WK2-Tests/307245%40main%20(703)/compositing/overflow/rtl-scrollbar-layer-positioning-pretty-diff.html --- /Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-WK2-Tests/build/layout-test-results/compositing/overflow/rtl-scrollbar-layer-positioning-expected.txt +++ /Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-WK2-Tests/build/layout-test-results/compositing/overflow/rtl-scrollbar-layer-positioning-actual.txt @@ -15,14 +15,14 @@ (GraphicsLayer (offsetFromRenderer width=13 height=13) (position 23.00 23.00) - (bounds origin 292.00 0.00) + (bounds origin 300.00 0.00) (bounds 316.00 316.00) (children 1 (GraphicsLayer (offsetFromRenderer width=13 height=13) - (scrollOffset (292,0)) + (scrollOffset (300,0)) (anchor 0.00 0.00) - (bounds 608.00 616.00) + (bounds 616.00 616.00) ) ) ) 2180800 3 ap 2026-02-12 09:05:18 -0800 This updated diff makes it look like something is truly wrong with scrollbar, and it's not for rebaselining. 2180941 4 d_delatoba 2026-02-12 14:59:36 -0800 Pull request: https://github.com/WebKit/WebKit/pull/58550 2180942 5 ews-feeder 2026-02-12 15:03:43 -0800 Test gardening commit 307407@main (ff0c84b551c9): <https://commits.webkit.org/307407@main> Reviewed commits have been landed. Closing PR #58550 and removing active labels. 2204590 6 dpino 2026-04-26 04:41:40 -0700 *** Bug 210849 has been marked as a duplicate of this bug. *** 2208718 7 479524 zalan 2026-05-07 14:08:19 -0700 Created attachment 479524 [fast-cq]Patch 2208801 8 ews-feeder 2026-05-07 17:44:34 -0700 Committed 312845@main (f726934bda0f): <https://commits.webkit.org/312845@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 479524. 479524 2026-05-07 14:08:19 -0700 2026-05-07 17:44:35 -0700 [fast-cq]Patch bug-307582-20260507140818.patch text/plain 2520 zalan RnJvbSBlZjliODc5YTEwODc0YjdlZTg0YWVlZDRkYTg5ZmE3NzE5NTQ5YmRlIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBBbGFuIEJhcmFkbGF5IDx6YWxhbkBhcHBsZS5jb20+CkRhdGU6 IFRodSwgNyBNYXkgMjAyNiAxNDowNzoxMyAtMDcwMApTdWJqZWN0OiBbUEFUQ0hdIFJFR1JFU1NJ T04oMzA3MjEyQG1haW4pOiBbaU9TXQogY29tcG9zaXRpbmcvb3ZlcmZsb3cvcnRsLXNjcm9sbGJh ci1sYXllci1wb3NpdGlvbmluZy5odG1sIGlzIGEgY29uc3RhbnQgdGV4dAogZmFpbHVyZSBodHRw czovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MzA3NTgyCiA8cmRhcjovL3Byb2Js ZW0vMTcwMTY1NzgxPgoKVW5yZXZpZXdlZCByZWJhc2VsaW5lLgoKKiBMYXlvdXRUZXN0cy9wbGF0 Zm9ybS9pb3MvVGVzdEV4cGVjdGF0aW9uczoKKiBMYXlvdXRUZXN0cy9wbGF0Zm9ybS9pb3MvY29t cG9zaXRpbmcvb3ZlcmZsb3cvcnRsLXNjcm9sbGJhci1sYXllci1wb3NpdGlvbmluZy1leHBlY3Rl ZC50eHQ6Ci0tLQogTGF5b3V0VGVzdHMvcGxhdGZvcm0vaW9zL1Rlc3RFeHBlY3RhdGlvbnMgICAg ICAgICAgICAgICAgICAgfCAyIC0tCiAuLi4vb3ZlcmZsb3cvcnRsLXNjcm9sbGJhci1sYXllci1w b3NpdGlvbmluZy1leHBlY3RlZC50eHQgICB8IDYgKysrLS0tCiAyIGZpbGVzIGNoYW5nZWQsIDMg aW5zZXJ0aW9ucygrKSwgNSBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9MYXlvdXRUZXN0cy9w bGF0Zm9ybS9pb3MvVGVzdEV4cGVjdGF0aW9ucyBiL0xheW91dFRlc3RzL3BsYXRmb3JtL2lvcy9U ZXN0RXhwZWN0YXRpb25zCmluZGV4IDVhNTNmNzg3ZWIzYy4uYmFjMmRmYTFjZjc5IDEwMDY0NAot LS0gYS9MYXlvdXRUZXN0cy9wbGF0Zm9ybS9pb3MvVGVzdEV4cGVjdGF0aW9ucworKysgYi9MYXlv dXRUZXN0cy9wbGF0Zm9ybS9pb3MvVGVzdEV4cGVjdGF0aW9ucwpAQCAtODU2Niw4ICs4NTY2LDYg QEAgd2Via2l0Lm9yZy9iLzI5OTgzMCBpbXBvcnRlZC93M2Mvd2ViLXBsYXRmb3JtLXRlc3RzL3N0 b3JhZ2UtYWNjZXNzLWFwaS9oYXNTdG9yYWcKIAogd2Via2l0Lm9yZy9iLzMxMzA4OSBmYXN0L2Jh Y2tncm91bmRzL2JhY2tncm91bmQtcmVwZWF0LWxvbmctc2Nyb2xsLmh0bWwgWyBJbWFnZU9ubHlG YWlsdXJlIFBhc3MgXQogCi13ZWJraXQub3JnL2IvMzA3NTgyIGNvbXBvc2l0aW5nL292ZXJmbG93 L3J0bC1zY3JvbGxiYXItbGF5ZXItcG9zaXRpb25pbmcuaHRtbCBbIEZhaWx1cmUgXQotCiB3ZWJr aXQub3JnL2IvMzA3ODg5IGh0dHAvdGVzdHMvbXVsdGlwYXJ0L211bHRpcGFydC1hc3luYy1pbWFn ZS5odG1sIFsgUGFzcyBGYWlsdXJlIF0KIAogaW1wb3J0ZWQvdzNjL3dlYi1wbGF0Zm9ybS10ZXN0 cy9jc3MvY3NzLWhpZ2hsaWdodC1hcGkvaGlnaGxpZ2h0LXRleHQtYWNyb3NzLWVsZW1lbnRzLmh0 bWwgWyBJbWFnZU9ubHlGYWlsdXJlIF0KZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL3BsYXRmb3Jt L2lvcy9jb21wb3NpdGluZy9vdmVyZmxvdy9ydGwtc2Nyb2xsYmFyLWxheWVyLXBvc2l0aW9uaW5n LWV4cGVjdGVkLnR4dCBiL0xheW91dFRlc3RzL3BsYXRmb3JtL2lvcy9jb21wb3NpdGluZy9vdmVy Zmxvdy9ydGwtc2Nyb2xsYmFyLWxheWVyLXBvc2l0aW9uaW5nLWV4cGVjdGVkLnR4dAppbmRleCA1 NTRkYmNmMjczN2EuLjIxMTFiYWM5YzA1OSAxMDA2NDQKLS0tIGEvTGF5b3V0VGVzdHMvcGxhdGZv cm0vaW9zL2NvbXBvc2l0aW5nL292ZXJmbG93L3J0bC1zY3JvbGxiYXItbGF5ZXItcG9zaXRpb25p bmctZXhwZWN0ZWQudHh0CisrKyBiL0xheW91dFRlc3RzL3BsYXRmb3JtL2lvcy9jb21wb3NpdGlu Zy9vdmVyZmxvdy9ydGwtc2Nyb2xsYmFyLWxheWVyLXBvc2l0aW9uaW5nLWV4cGVjdGVkLnR4dApA QCAtMTUsMTQgKzE1LDE0IEBACiAgICAgICAgICAgICAoR3JhcGhpY3NMYXllcgogICAgICAgICAg ICAgICAob2Zmc2V0RnJvbVJlbmRlcmVyIHdpZHRoPTEzIGhlaWdodD0xMykKICAgICAgICAgICAg ICAgKHBvc2l0aW9uIDIzLjAwIDIzLjAwKQotICAgICAgICAgICAgICAoYm91bmRzIG9yaWdpbiAy OTIuMDAgMC4wMCkKKyAgICAgICAgICAgICAgKGJvdW5kcyBvcmlnaW4gMzAwLjAwIDAuMDApCiAg ICAgICAgICAgICAgIChib3VuZHMgMzE2LjAwIDMxNi4wMCkKICAgICAgICAgICAgICAgKGNoaWxk cmVuIDEKICAgICAgICAgICAgICAgICAoR3JhcGhpY3NMYXllcgogICAgICAgICAgICAgICAgICAg KG9mZnNldEZyb21SZW5kZXJlciB3aWR0aD0xMyBoZWlnaHQ9MTMpCi0gICAgICAgICAgICAgICAg ICAoc2Nyb2xsT2Zmc2V0ICgyOTIsMCkpCisgICAgICAgICAgICAgICAgICAoc2Nyb2xsT2Zmc2V0 ICgzMDAsMCkpCiAgICAgICAgICAgICAgICAgICAoYW5jaG9yIDAuMDAgMC4wMCkKLSAgICAgICAg ICAgICAgICAgIChib3VuZHMgNjA4LjAwIDYxNi4wMCkKKyAgICAgICAgICAgICAgICAgIChib3Vu ZHMgNjE2LjAwIDYxNi4wMCkKICAgICAgICAgICAgICAgICApCiAgICAgICAgICAgICAgICkKICAg ICAgICAgICAgICkK