I see RequestError for a certain source.

[srawlins]

When I put in this code, I see a RequestError at the bottom:

import 'dart:async';

void f<X extends FutureOr<X>>(X x) {
  x.asStream(); // A member from the interface of `Future`.
  x.whatever; // A non-member of all classes nearby.
}

void main() {}

If I comment out both statements in f, the error disappears.

The text of the error is not copy-pastable 🤔 but I can screenshot it.

[srawlins]

Ah, on the command line, this code causes the analyzer to stack-overflow, so...