The browser crashes when use React.lazy return Promise.resolve(undefined)

Do you want to request a feature or report a bug? bug

What is the current behavior? The browser crashes

const Loading = () => <div>loading...</div>;
const Component = lazy(() => Promise.resolve(undefined));

function App() {
  return (
    <div className="App">
      <Suspense fallback={<Loading />}>
        <Component />
      </Suspense>
    </div>
  );
}

I can’t provide an example of CodeSandbox, which would cause the browser to crash

What is the expected behavior? throw Error

Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React? react@16.8.3 react-dom@16.8.3 chrome 72.0.3626.119

[gaearon]

Ok I see what you mean now. You’re saying React enters an infinite loop it lazy import resolves to undefined. That sounds like something we’d want to fix (even though it’s a bug in the application code).

[daychongyang]

I have the same problem after using React.lazy for code splitting, sometimes there is memory soaring, the page is unresponsive, and the console is madly reporting an error. Has this problem been solved in the current release? @gaearon @raunofreiberg  (⊙ˍ⊙)