Bug 245613 – REGRESSION (253865@main): [ iOS ] scrollingcoordinator/ios/fixed-in-frame-layer-reconcile-layer-position.html is a consistent failure

• Status: RESOLVED
• Resolution: CONFIGURATION CHANGED
• Component: New Bugs

[Karl Rackler]

Description:
scrollingcoordinator/ios/fixed-in-frame-layer-reconcile-layer-position.html

This iOS consistent failure only happens on the iPad (5th generation) model.  The first failure I saw on the dashboard was on 8/27/2022 at 253870@main.  As I look at the commits in the range, 253865@main has to do with scrolling and is most likely the cause of the regression.  

Reproduction steps:
I can reproduce this on 253865@main but cannot reproduce it on 253864@main or earlier.

Command: 
run-webkit-tests --ipad-simulator --model 'iPad (5th generation)' --release --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 --no-retry scrollingcoordinator/ios/fixed-in-frame-layer-reconcile-layer-position.html

Result: 
Regressions: Unexpected text-only failures (1)
  scrollingcoordinator/ios/fixed-in-frame-layer-reconcile-layer-position.html [ Failure ]

History:
https://results.webkit.org/?suite=layout-tests&test=scrollingcoordinator%2Fios%2Ffixed-in-frame-layer-reconcile-layer-position.html&limit=50000&model=iPad%20(5th%20generation)

Diff:
--- /Volumes/Data/worker/Apple-iPadOS-16-Simulator-Release-WK2-Tests/build/layout-test-results/scrollingcoordinator/ios/fixed-in-frame-layer-reconcile-layer-position-expected.txt
+++ /Volumes/Data/worker/Apple-iPadOS-16-Simulator-Release-WK2-Tests/build/layout-test-results/scrollingcoordinator/ios/fixed-in-frame-layer-reconcile-layer-position-actual.txt
@@ -31,8 +31,13 @@
                               (children 1
                                 (GraphicsLayer
                                   (position 8.00 10.00)
-                                  (bounds 200.00 140.00)
-                                  (contentsOpaque 1)
+                                  (preserves3D 1)
+                                  (children 1
+                                    (GraphicsLayer
+                                      (bounds 200.00 140.00)
+                                      (contentsOpaque 1)
+                                    )
+                                  )
                                 )
                               )
                             )

[Radar WebKit Bug Importer]

<rdar://problem/100350197>

[Karl Rackler]

I have marked this test as a flaky failure while this issue is investigated because it only happens on the iPad (5th generation) model.

[EWS]

Test gardening commit 254817@main (2eaadf70eac0): <https://commits.webkit.org/254817@main>

Reviewed commits have been landed. Closing PR #4659 and removing active labels.

[EWS]

Test gardening commit 254864@main (6f702caba723): <https://commits.webkit.org/254864@main>

Reviewed commits have been landed. Closing PR #4710 and removing active labels.

[Karl Rackler]

Re-baseline test

[EWS]

Test gardening commit 263717@main (383a982530b9): <https://commits.webkit.org/263717@main>

Reviewed commits have been landed. Closing PR #13496 and removing active labels.

[Karl Rackler]

Remove test expectation.

[EWS]

Test gardening commit 263718@main (7c7f0792fd14): <https://commits.webkit.org/263718@main>

Reviewed commits have been landed. Closing PR #13497 and removing active labels.