Bug 256217 – [ Debug iOS, macOS ] imported/w3c/web-platform-tests/background-fetch/port-blocking.https.window.html is a flaky crash

• Status: RESOLVED
• Resolution: FIXED
• Component: Page Loading

[Robert Jenner]

imported/w3c/web-platform-tests/background-fetch/port-blocking.https.window.html

is a flaky crash on macOS and iOS for debug only. 

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fbackground-fetch%2Fport-blocking.https.window.html&architecture=arm64

There does not appear to be a crashlog generated for this test, but I will try to find one. Also, it appears to occur on Intel more than Apple Silicon, but it does look like it occurs on both.

[Radar WebKit Bug Importer]

<rdar://problem/108798120>

[Alexey Proskuryakov]

imported/w3c/web-platform-tests/background-fetch/get-ids.https.window.html also terminates like this. 

I couldn't find crash logs either, might be terminating for a different reason.

[Robert Jenner]

I was able to reproduce a crash when running this test at Ventura Debug ToT as follows:

run-webkit-tests --debug --no-build imported/w3c/web-platform-tests/background-fetch/port-blocking.https.window.html --iterations 100 -f

I was reproducing on an Intel Mac, and out of 100 runs it crashed 17 times.

[EWS]

Test gardening commit 263615@main (dc63b737ed02): <https://commits.webkit.org/263615@main>

Reviewed commits have been landed. Closing PR #13387 and removing active labels.

[EWS]

Committed 269283@main (f8d69ab96275): <https://commits.webkit.org/269283@main>

Reviewed commits have been landed. Closing PR #19030 and removing active labels.