Errors are not reported properly to the console

[LewisHolliday]

https://dartpad.dev/

This does not print anything to the console on chrome or firefox:

void main() async {
  throw 'test';
}

---

This prints 'Script error.' on chrome, and on firefox prints 'Error: test, error: Error: test':

void main() {
  throw 'test';
}

Related issue: https://github.com/dart-lang/dart-pad/issues/2742