This patch: https://bugs.webkit.org/attachment.cgi?id=331845&action=edit added 2 tests without results. EWS claims that the patch passed tests on mac <https://webkit-queues.webkit.org/patch/331845/mac-wk2-ews> but correctly failed on Windows <https://webkit-queues.webkit.org/patch/331845/win-ews> This implies that macOS EWS is broken.
Very true. *** This bug has been marked as a duplicate of bug 177723 ***