fix issue #34 'undefined method to_backtrace for Hash'
fix issue #34 'undefined method to_backtrace for Hash'

CarlosCD/airbrake,nick-desteffen/airbrake,nick-desteffen/airbrake,airbrake/airbrake,benjaminoakes/airbrake,stevecrozz/hydraulic_brake,airbrake/airbrake,CarlosCD/airbrake,Shopify/airbrake