Reload doesn't happen after build errors in some cases

[gaearon]

In particular, if I write:

class App extends Component {
  render() {
    setInterval(() => {
      throw new Error('no')
    })

Then introduce a syntax error.

Then fix it.

Expected: refresh happens.
Actual: we're stuck on the build error message.

[gaearon]

Seems like this is just a case of setInterval calls getting in the way of webpack's Promise resolution (since Promises resolve asynchronously). I guess it's an uncommon case.