This check has been removed from the spec, Firefox and Chrome. All information here: https://github.com/whatwg/fetch/issues/583
Created attachment 347671 [details] Patch
Comment on attachment 347671 [details] Patch It seems there is a WPT test for it https://github.com/web-platform-tests/wpt/pull/7385 ; should we also import / update the test?
Created attachment 347778 [details] Patch
Comment on attachment 347778 [details] Patch Clearing flags on attachment: 347778 Committed r235174: <https://trac.webkit.org/changeset/235174>
All reviewed patches have been landed. Closing bug.
<rdar://problem/43608089>