[Webkit-unassigned] [Bug 268040] New: New Test (204015 at main): 6 imported/w3c/web-platform-tests/xhr/* are flakily failing.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=268040

            Bug ID: 268040
           Summary: New Test (204015 at main): 6
                    imported/w3c/web-platform-tests/xhr/* are flakily
                    failing.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ben_schwartz at apple.com

The following tests are flakily failing on all platforms across WK1 and WK2:

imported/w3c/web-platform-tests/xhr/event-upload-progress.any.html
imported/w3c/web-platform-tests/xhr/event-upload-progress.any.worker.html
imported/w3c/web-platform-tests/xhr/request-content-length.any.html
imported/w3c/web-platform-tests/xhr/request-content-length.any.worker.html
imported/w3c/web-platform-tests/xhr/send-response-event-order.htm
imported/w3c/web-platform-tests/xhr/send-response-upload-event-loadend.htm

HISTORY:

https://results.webkit.org/?version_name=Monterey&version_name=Ventura&version_name=Sonoma&version_name=iOS%2017&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Fevent-upload-progress.any.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Fevent-upload-progress.any.worker.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Frequest-content-length.any.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Frequest-content-length.any.worker.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Fsend-response-event-order.htm&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Fsend-response-upload-event-loadend.htm

TEXT DIFFs:

Attached.

DIFF URL:

https://build.webkit.org/results/Apple-iPadOS-17-Simulator-Release-WK2-Tests/273434@main%20(808)/imported/w3c/web-platform-tests/xhr/event-upload-progress.any-pretty-diff.html

REPRODUCIBILITY:

I was able to reproduce this issue on macOS Sonoma (14.3, 23D56/arm64) ToT using the following command:

run-webkit-tests -v -1 --debug imported/w3c/web-platform-tests/xhr/event-upload-progress.any.html --child-processes 10 --iterations 1000 -f --exit-after-n-failures 1

(for the last test, iterations must be changed from 1000 to 10000)

REGRESSION:

Contextual information indicates that this may have been a problem since these tests were introduced at 204015 at main.

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