document.open() should abort all loads when the document is navigating or there is a queued navigation: - https://github.com/whatwg/html/issues/3975
Pull request: https://github.com/WebKit/WebKit/pull/4513
Committed 254699@main (952f3c7c8ab8): <https://commits.webkit.org/254699@main> Reviewed commits have been landed. Closing PR #4513 and removing active labels.
<rdar://problem/100196895>