Bug 289018 – REGRESSION(284785@main): [ iOS ] imported/w3c/web-platform-tests/navigation-api/navigation-methods/return-value/back-204-205-download.html is a flaky failure.

• Status: NEW
• Component: Page Loading

[Yasmin Karimi]

imported/w3c/web-platform-tests/navigation-api/navigation-methods/return-value/back-204-205-download.html

This test is a flaky failure (very consistent though) on iOS.

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fnavigation-api%2Fnavigation-methods%2Freturn-value%2Fback-204-205-download.html

TEXT DIFF:

@@ -1,6 +1,6 @@
 
 
-FAIL back() promises to 204s never settle assert_unreached: onunload should not be called Reached unreachable code
+PASS back() promises to 204s never settle
 FAIL back() promises to 205s never settle assert_unreached: onunload should not be called Reached unreachable code
 PASS back() promises to Content-Disposition: attachment responses never settle

DIFF URL:

https://build.webkit.org/results/Apple-iPadOS-18-Simulator-Release-WK2-Tests/291510@main%20(485)/imported/w3c/web-platform-tests/navigation-api/navigation-methods/return-value/back-204-205-download-pretty-diff.html

REPROUCIBILTY:

I was able to reproduce this issue on the iOS 18.2 simulator at ToT using the following command:

run-webkit-tests --ios-simulator --child-processes 2 -f imported/w3c/web-platform-tests/navigation-api/navigation-methods/return-value/back-204-205-download.html --iterations 5

REGRESSION:

According to contextual information, the probable regression point is 284785@main. The code paths changed in this commit appear to be related to the observed regression test failure. 

This shows the regression more clearly:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fnavigation-api%2Fnavigation-methods%2Freturn-value%2Fback-204-205-download.html&platform=ios&recent=false&version_name=iOS%2018&version_name=iOS%2017

[Radar WebKit Bug Importer]

<rdar://problem/146059202>

[EWS]

Test gardening commit 291531@main (ed06a0166d23): <https://commits.webkit.org/291531@main>

Reviewed commits have been landed. Closing PR #41815 and removing active labels.