Bug 301660 – REGRESSION(iOS26, Tahoe) [ iOS26 Tahoe Debug ]: TestWebKitAPI.WKWebExtensionAPIDeclarativeNetRequest.BlockedLoadInPrivateBrowsingTest is a constant timeout

• Component: WebKit Extensions
• Status: RESOLVED FIXED

[Robert Jenner]

TestWebKitAPI.WKWebExtensionAPIDeclarativeNetRequest.BlockedLoadInPrivateBrowsingTest

is a constant timeout on iOS26 and Tahoe Debug. The test was passing on iOS18 Debug, and continues to pass on Sequoia Debug.

HISTORY:
https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.WKWebExtensionAPIDeclarativeNetRequest.BlockedLoadInPrivateBrowsingTest

TIMEOUT ERROR:
"name": "TestWebKitAPI.WKWebExtensionAPIDeclarativeNetRequest.BlockedLoadInPrivateBrowsingTest",
"output": "ERROR: Unable to get path protection class\n/Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-Build/build/Source/WTF/wtf/cocoa/FileSystemCocoa.mm(248) : bool WTF::FileSystemImpl::isSafeToUseMemoryMapForPath(const String &)\nERROR: Unhandled web process message 'WebPage_RegisterURLSchemeHandler' (destination: 25 pid: 61876)\n/Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-Build/build/Source/WebKit/WebProcess/WebProcess.cpp(1107) : virtual bool WebKit::WebProcess::filterUnhandledMessage(IPC::Connection &, IPC::Decoder &)\nERROR: Unhandled web process message 'WebPage_RegisterURLSchemeHandler' (destination: 34 pid: 61877)\n/Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-Build/build/Source/WebKit/WebProcess/WebProcess.cpp(1107) : virtual bool WebKit::WebProcess::filterUnhandledMessage(IPC::Connection &, IPC::Decoder &)\nERROR: Unable to get path protection class\n/Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-Build/build/Source/WTF/wtf/cocoa/FileSystemCocoa.mm(248) : bool WTF::FileSystemImpl::isSafeToUseMemoryMapForPath(const String &)\nERROR: Unable to get path protection class\n/Volumes/Data/worker/Apple-iOS-26-Simulator-Debug-Build/build/Source/WTF/wtf/cocoa/FileSystemCocoa.mm(248) : bool WTF::FileSystemImpl::isSafeToUseMemoryMapForPath(const String &)"

[Radar WebKit Bug Importer]

<rdar://problem/163669919>

[Robert Jenner]

I was able to reproduce this timeout at iOS 26 Debug ToT running the test as follows:

run-api-tests --iOS-simulator TestWebKitAPI.WKWebExtensionAPIDeclarativeNetRequest.BlockedLoadInPrivateBrowsingTest

We see in the history that this test started to timeout when we transitioned our testing from iOS 18 to iOS 26 and on Tahoe Debug. It was a constant pass on 18, and Sequoia Debug and became a constant timeout since bringing up testing on iOS26, and Tahoe.

[EWS]

Test gardening commit 302317@main (c585ad398ca4): <https://commits.webkit.org/302317@main>

Reviewed commits have been landed. Closing PR #53171 and removing active labels.

[Robert Jenner]

(In reply to EWS from comment #3)
> Test gardening commit 302317@main (c585ad398ca4):
> <https://commits.webkit.org/302317@main>
> 
> Reviewed commits have been landed. Closing PR #53171 and removing active
> labels.

I have disabled the test with the above commit while under investigation.

[EWS]

Test gardening commit 302353@main (66e2d2ee61e4): <https://commits.webkit.org/302353@main>

Reviewed commits have been landed. Closing PR #53206 and removing active labels.

[Robert Jenner]

This test still appears to be a constant timeout on iOS26 and Tahoe Debug after the proposed fix at: https://commits.webkit.org/302465@main 

observed at:
https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.WKWebExtensionAPIDeclarativeNetRequest.BlockedLoadInPrivateBrowsingTest


Assigning back to Brian.

[Robert Jenner]

Pull request: https://github.com/WebKit/WebKit/pull/54144

[EWS]

Committed 303215@main (b22bef763d44): <https://commits.webkit.org/303215@main>

Reviewed commits have been landed. Closing PR #54144 and removing active labels.