The following layout test is flaky on macOS Debug WK1
Unknown, this test has been flaky for a while.
@@ -1,2 +1,2 @@
-PASS: video source selected.
+FAIL: <img> threw error.
Marked test as flaky in https://trac.webkit.org/changeset/227204/webkit
Oh.. I thought this looked familiar. This was supposed to be addressed in https://bugs.webkit.org/show_bug.cgi?id=181008
It is still flaky, though.
*** This bug has been marked as a duplicate of bug 181008 ***