The following DRT tests crash on MacOS 10.9 when run with Lombard b114:
fast/dom/Window/window-postmessage-clone-deep-array.html
fast/js/large-expressions.html
fast/js/reentrant-caching.html
fast/js/stack-trace.html
fast/js/string-replace-exception-crash.html
fast/js/toString-stack-overflow.html
fast/workers/shared-worker-constructor.html
fast/workers/worker-constructor.html
fast/xmlhttprequest/xmlhttprequest-recursive-sync-event.html

The crash can be reproduced manually (e.g., with Browser sample).