The crashes are fixed, but the test get different output on different runs. It sometimes gets one line like the below, and other times two: CONSOLE MESSAGE: line 95: RangeError: Maximum call stack size exceeded. https://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&showExpectations=true&revision=177586&tests=fast%2Fxmlhttprequest%2Fxmlhttprequest-recursive-sync-event.html
Marked as flaky in <http://trac.webkit.org/r177653>.