[Webkit-unassigned] [Bug 282665] New: REGRESSION (285499 at main): [ Ventura wk2 ] imported/w3c/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=282665

            Bug ID: 282665
           Summary: REGRESSION (285499 at main): [ Ventura wk2 ]
                    imported/w3c/web-platform-tests/scroll-animations/scro
                    ll-timelines/setting-timeline.tentative.html is a
                    flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: com.webkit.iidmsa at gmail.com

imported/w3c/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html
is a flaky failure on macOS Ventura wk2.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fscroll-animations%2Fscroll-timelines%2Fsetting-timeline.tentative.html

TEXT DIFF:
--- /Volumes/Data/worker/Apple-Ventura-Release-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative-expected.txt
+++ /Volumes/Data/worker/Apple-Ventura-Release-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative-actual.txt
@@ -1,18 +1,20 @@
+
+Harness Error (TIMEOUT), message = null

 PASS Setting a scroll timeline on a play-pending animation synchronizes currentTime of the animation with the scroll position.
 PASS Setting a scroll timeline on a pause-pending animation fixes the currentTime of the animation based on the scroll position once resumed
 PASS Setting a scroll timeline on a reversed play-pending animation synchronizes the currentTime of the animation with the scroll position.
 FAIL Setting a scroll timeline on a running animation synchronizes the currentTime of the animation with the scroll position. assert_approx_equals: Timeline's currentTime aligns with the scroll position even when paused expected a number but got a "object"
 PASS Setting a scroll timeline on a paused animation fixes the currentTime of the animation based on the scroll position when resumed
-PASS Setting a scroll timeline on a reversed paused animation fixes the currentTime of the animation based on the scroll position when resumed
-PASS Transitioning from a scroll timeline to a document timeline on a running animation preserves currentTime
-PASS Transitioning from a scroll timeline to a document timeline on a pause-pending animation preserves currentTime
-FAIL Transition from a scroll timeline to a document timeline on a reversed paused animation maintains correct currentTime assert_approx_equals: values do not match for "Animation's currentTime aligns with the scroll position" expected 90 +/- 0.125 but got -100
-PASS Transitioning from a scroll timeline to a null timeline on a running animation preserves current progress.
-FAIL Switching from a null timeline to a scroll timeline on an animation with a resolved start time preserved the play state promise_test: Unhandled rejection with value: object "TypeError: null is not an object (evaluating 'actual.unit')"
-FAIL Switching from one scroll timeline to another updates currentTime promise_test: Unhandled rejection with value: object "TypeError: null is not an object (evaluating 'actual.unit')"
-FAIL Switching from a document timeline to a scroll timeline updates currentTime when unpaused via CSS. assert_equals: 'actual' unit type must be 'percent' for "undefined" expected (string) "percent" but got (undefined) undefined
-PASS Switching from a document timeline to a scroll timeline and updating currentTime preserves the progress while paused.
-FAIL Switching from a document timeline to a scroll timeline on an infinite duration animation. assert_equals: 'actual' unit type must be 'percent' for "undefined" expected (string) "percent" but got (undefined) undefined
-FAIL Changing from a scroll-timeline to a view-timeline updates start time. assert_approx_equals: values do not match for "Animation's currentTime aligns with the scroll position" expected 0 +/- 0.125 but got 10
+TIMEOUT Setting a scroll timeline on a reversed paused animation fixes the currentTime of the animation based on the scroll position when resumed Test timed out
+NOTRUN Transitioning from a scroll timeline to a document timeline on a running animation preserves currentTime
+NOTRUN Transitioning from a scroll timeline to a document timeline on a pause-pending animation preserves currentTime
+NOTRUN Transition from a scroll timeline to a document timeline on a reversed paused animation maintains correct currentTime
+NOTRUN Transitioning from a scroll timeline to a null timeline on a running animation preserves current progress.
+NOTRUN Switching from a null timeline to a scroll timeline on an animation with a resolved start time preserved the play state
+NOTRUN Switching from one scroll timeline to another updates currentTime
+NOTRUN Switching from a document timeline to a scroll timeline updates currentTime when unpaused via CSS.
+NOTRUN Switching from a document timeline to a scroll timeline and updating currentTime preserves the progress while paused.
+NOTRUN Switching from a document timeline to a scroll timeline on an infinite duration animation.
+NOTRUN Changing from a scroll-timeline to a view-timeline updates start time.

DIFF URL:
https://build.webkit.org/results/Apple-Ventura-Release-WK2-Tests/285500%40main%20%288551%29/imported/w3c/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative-pretty-diff.html

REPRODUCIBILITY: 
I was able to reproduce on ToT using command: 
run-webkit-tests imported/w3c/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html --release --iteration=10

DESCRIPTION: 
On 285499 at main the test was rebaselined.

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