deno: Importing https://esm.sh/react-dom@17.0.2 hangs Deno

With Deno v1.25.0, and this demo.mjs file:

import "https://esm.sh/react-dom@17.0.2";

console.log("here");

Run:

deno run demo.mjs

And the terminal output is:

This browser doesn't support requestAnimationFrame. Make sure that you load a polyfill in older browsers. https://reactjs.org/link/react-polyfills
This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://reactjs.org/link/react-polyfills
here

But the process hangs forever and doesn’t exit. I can’t figure out why; it seems to be a Deno bug.