Errors thrown in `render()` swallowed

Since Promise.resolve().then(...) is used for deferring to another tick, any errors thrown inside render () { ... } gets silently thrown away. At least in Safari TP 15, I think that some other browsers reports unhandled rejections.

This is very unintuitive when developing since there is no way to see what went wrong.

[developit]

@robertknight Yes, absolutely we can re-open. FWIW I think we should probably switch (back) to setTimeout for debouncing since it fixes this and is smaller.

[jakearchibald]

If it continues to be a bad user experience for devs, preact could do:

p.catch(err => {
  console.error(err);
  throw err;
});

…at the end of its promise chains.