Prevent an "undefined method `to_sym' for nil:NilClass" error when an actor with an exclusive method handles an ExitEvent
Prevent an "undefined method `to_sym' for nil:NilClass" error when
an actor with an exclusive method handles an ExitEvent

seuros/celluloid,marshall-lee/celluloid,jstoja/celluloid,jasonm23/celluloid,dilumn/celluloid,TiagoCardoso1983/celluloid,davydovanton/celluloid,celluloid/celluloid,kenichi/celluloid,sideci-sample/sideci-sample-celluloid,olleolleolle/celluloid,mehta/celluloid