[Webkit-unassigned] [Bug 260926] New: [ wk2 ] imported/w3c/web-platform-tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260926

            Bug ID: 260926
           Summary: [ wk2 ]
                    imported/w3c/web-platform-tests/html/browsers/browsing
                    -the-web/navigating-across-documents/replace-before-lo
                    ad/form-submit-button-click.html is a flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ben_schwartz at apple.com
                CC: akeerthi at apple.com, cdumez at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com,
                    wenson_hsieh at apple.com

imported/w3c/web-platform-tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html

This test is a flaky failure on wk2.

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fbrowsers%2Fbrowsing-the-web%2Fnavigating-across-documents%2Freplace-before-load%2Fform-submit-button-click.html

TEXT DIFF:

-PASS Replace before load, triggered by submitButton.click()
+FAIL Replace before load, triggered by submitButton.click() assert_equals: expected "http://localhost:8800/common/blank.html?thereplacement=" but got "http://localhost:8800/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html?pipe=sub(none)&code=%0A%20%20%20%20const%20form%20%3D%20document.createElement(%22form%22)%3B%0A%20%20%20%20form.action%20%3D%20%22%2Fcommon%2Fblank.html%22%3B%0A%0A%20%20%20%20const%20input%20%3D%20document.createElement(%22input%22)%3B%0A%20%20%20%20input.type%20%3D%20%22hidden%22%3B%0A%20%20%20%20input.name%20%3D%20%22thereplacement%22%3B%0A%20%20%20%20form.append(input)%3B%0A%0A%20%20%20%20const%20button%20%3D%20document.createElement(%22button%22)%3B%0A%20%20%20%20button.type%20%3D%20%22submit%22%3B%0A%20%20%20%20form.append(button)%3B%0A%0A%20%20%20%20document.currentScript.before(form)%3B%0A%20%20%20%20button.click()%3B%0A%20%20"

DIFF URL:

https://build.webkit.org/results/Apple-Ventura-Release-AppleSilicon-WK2-Tests/267458@main%20(4705)/imported/w3c/web-platform-tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-pretty-diff.html

REPRODUCTION:

I was able to reproduce this bug on macOS Ventura (13.5, 22G74/arm64) using the following command:

run-webkit-tests --clobber-old-results --verbose imported/w3c/web-platform-tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html --iterations 1000 --child-processes 10 -f --exit-after-n-failures 1

REGRESSION/NOTES:

I was unable to bisect a regression point. It appears that the problem may be caused by an async issue (events firing out of intended order, or before a promise is completed).

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