Unit tests fail silently on exception in tcb.createAsync.then function

gistfile1.txt

import {ComponentFixture, describe, expect, inject, it, TestComponentBuilder} from 'angular2/testing'
import {Component, View} from 'angular2/src/core/metadata'

@Component({ selector: 'basic-component' })
@View({ template: '<div></div>' })
class BasicComponent {  }

// Set up the browser adapter
import {BrowserDomAdapter} from 'angular2/src/platform/browser/browser_adapter'
BrowserDomAdapter.makeCurrent()

describe('BasicComponent', () => {
    it('should create a new component', inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
        tcb.createAsync(BasicComponent).then((fixture: ComponentFixture) => {
            expect(fixture.debugElement).not.toBe(null)
            throw ('exception')
            expect(false).toBe(true)
        })
    }))
})