[myfonj]

Dug through WebKit Bugzilla and Trac and the only recent visible "crash backdrop" issue seems to be "Fix crash when reflections and backdrop filter are combined" [1], which references bug that requires authorization [2].

[1] https://trac.webkit.org/changeset/235475/webkit [2] https://bugs.webkit.org/show_bug.cgi?id=188504