[curl] REGRESSION(r281158): fetch('http://localhost/') from about:blank doesn't emit the console error message

[Fujii Hironori]

[curl] REGRESSION(r281158): fetch('http://localhost/') from about:blank doesn't emit the console error message

See Bug#228095 Comment#18.

[Fujii Hironori]

1. Start WinCairo WK2 MiniBrowser
2. Open a local file.  Go to file:///.../something.html
3. Open Web Inspector Console
4. Start a local web server
   Invoke "python.exe .\Tools\Scripts\run-webkit-httpd" as admin
5. Invoke "fetch('http://localhost:8000/')" in the Web Inspector console

Expected: the following error message should be shown

> > fetch('http://localhost:8000/')
> < Promise {status: "pending"}
> [Error] Origin null is not allowed by Access-Control-Allow-Origin.
> [Error] Fetch API cannot load http://localhost:8000/ due to access control checks.
> [Error] Failed to load resource: Origin null is not allowed by Access-Control-Allow-Origin. (localhost, line 0)

Actual: No such error message

[Fujii Hironori]

Committed r281614 (240970@main): <https://commits.webkit.org/240970@main>

[Radar WebKit Bug Importer]

<rdar://problem/82377669>