Bug 315308

Summary:	[Site Isolation] Several Inspector cross-origin-iframe getResponseBody tests flake on mac-wk2-stress in site-isolation mode
Product:	WebKit	Reporter:	Blaze Burg <bburg>
Component:	Web Inspector	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Normal	CC:	inspector-bugzilla-changes, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:	308890
Bug Blocks:

Blaze Burg

Reported 2026-05-21 10:59:08 PDT

The following 5 layout tests pass on the mac-site-isolation queue but regress (PASS -> TEXT, with stderr) on mac-wk2-stress when run in site-isolation mode under high parallel-worker concurrency: http/tests/inspector/network/cross-origin-iframe-get-response-body-after-navigation.html http/tests/inspector/network/cross-origin-iframe-get-response-body-binary.html http/tests/inspector/network/cross-origin-iframe-get-response-body-document.html http/tests/inspector/network/cross-origin-iframe-get-response-body-error-cases.html http/tests/inspector/network/cross-origin-iframe-get-response-body-subresources.html These tests were added by the BackendResourceDataStore work (webkit.org/b/308890, PR #61172). Failures observed on EWS: https://ews-build.webkit.org/#/builders/8/builds/146763 (#61172) https://ews-build.webkit.org/#/builders/8/builds/146764 (#61177) Marking [ Skip ] in platform/mac-wk2/TestExpectations to unblock landing, following the same pattern as webkit.org/b/315225 (cross-origin-iframe- request-id-uniqueness.html). Investigation needed: stress-mode parallelism likely interacts with BackendResourceDataStore lifecycle / event ordering. Re-enable when the race is understood and addressed.

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Radar WebKit Bug Importer

Comment 1 2026-05-21 10:59:14 PDT

<rdar://problem/177637309>

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