229515 2021-08-25 14:06:10 -0700 [curl] REGRESSION(r281158): fetch('http://localhost/') from about:blank doesn't emit the console error message 2021-08-26 00:27:19 -0700 1 1 1 Unclassified WebKit WebKit2 WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 fujii webkit-unassigned kkinnunen webkit-bug-importer oldest_to_newest 1787303 0 fujii 2021-08-25 14:06:10 -0700 [curl] REGRESSION(r281158): fetch('http://localhost/') from about:blank doesn't emit the console error message See Bug#228095 Comment#18. 1787310 1 fujii 2021-08-25 14:13:44 -0700 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 1787489 2 fujii 2021-08-26 00:26:07 -0700 Committed r281614 (240970@main): <https://commits.webkit.org/240970@main> 1787490 3 webkit-bug-importer 2021-08-26 00:27:19 -0700 <rdar://problem/82377669>