[Webkit-unassigned] [Bug 284653] New: REGRESSION (285002 at main): [ iOS macOS wk2 ] http/tests/site-isolation/compositing/iframes/resize-from-zero-size.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284653

            Bug ID: 284653
           Summary: REGRESSION (285002 at main): [ iOS macOS wk2 ]
                    http/tests/site-isolation/compositing/iframes/resize-f
                    rom-zero-size.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: rackler at apple.com
                CC: mattwoodrow at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com

Description:
http/tests/site-isolation/compositing/iframes/resize-from-zero-size.html

The test was added at https://commits.webkit.org/284782@main and has been a flaky failure since then.

There was a fix implemented with commit https://commits.webkit.org/284932@main that fixed the test, and it was constantly passing until it was reverted at commit https://commits.webkit.org/285002@main, rendering the test to a flaky failure again.

This issue can be reproduced using command:
run-webkit-tests --debug --no-retry --force -f --iterations=50 http/tests/site-isolation/compositing/iframes/resize-from-zero-size.html

History:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fsite-isolation%2Fcompositing%2Fiframes%2Fresize-from-zero-size.html

Diff:
               (children 1
                 (GraphicsLayer
                   (anchor 0.00 0.00)
-                  (bounds 400.00 300.00)
+                  (bounds 800.00 600.00)
                   (children 1
                     (GraphicsLayer
                       (anchor 0.00 0.00)
                       (children 1
                         (GraphicsLayer
                           (anchor 0.00 0.00)
-                          (bounds 400.00 300.00)
+                          (bounds 800.00 600.00)
                           (children 1
                             (GraphicsLayer
-                              (bounds 400.00 300.00)
+                              (bounds 800.00 600.00)
                               (drawsContent 1)
                               (children 1
                                 (GraphicsLayer

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