Summary: public
Any uncaught exception inside an event emitter handler was reported as softError, which didn't crash the app, but left the app running in an unknown state. Since there's no way for the app to catch these softerror (to provide a fallback error view, etc), let's change it to report fatal error for uncaught exception for the time being.
Reviewed By: javache
Differential Revision: D2685322
fb-gh-sync-id: 52956d3db20809cc90448bd080795754b899435e