deadunitCore.browser.umd.js
function recordAndTriggerHandlers(type, eventData) {
            this.history.push({type:type, data: eventData})
            this.handlers[type].forEach(function(handlerInfo) {
                try {
                    handlerInfo.handler.call(undefined, eventData)
                } catch(e) {

                    // throw error asynchronously because these error should be separate from the test exceptions
                    var throwErrorFn = options.throwAsyncException

                    if(handlerInfo.domain) {
                        throwErrorFn = handlerInfo.domain.bind(throwErrorFn)    // this domain bind is needed because emit is done inside deadunit's test domain, which isn't where we want to put errors caused by the event handlers
                    }

                    throwErrorFn(e)
                }
            })
        }
function recordAndTriggerHandlers(type, eventData) {
            this.history.push({type:type, data: eventData})
            this.handlers[type].forEach(function(handlerInfo) {
                try {
                    handlerInfo.handler.call(undefined, eventData)
                } catch(e) {

                    // throw error asynchronously because these error should be separate from the test exceptions
                    var throwErrorFn = options.throwAsyncException

                    if(handlerInfo.domain) {
                        throwErrorFn = handlerInfo.domain.bind(throwErrorFn)    // this domain bind is needed because emit is done inside deadunit's test domain, which isn't where we want to put errors caused by the event handlers
                    }

                    throwErrorFn(e)
                }
            })
        }
the synchronous part of emitting