Dartdevk produces an error when null is returned from async function with return type dyncmic

[sgrekhov]

The following co19 test fails on dartdevc compiler with Error: Expected a value of type 'Object', but got one of type 'Null'

Object test1() async {
  Object? o = null;
  return o;
}

dynamic test2() async {
  Object? o = null;
  return o;
}

main() {
  test1();
  test2();
}

Error log
This test works well on all other platforms and must pass on derdevk as well

[eernstg]

Drive-by comment: I agree that there is no error in this example. However, the log looks like dartdevk-strong-linux-release-chrome is crashing rather than reporting a (spurious) type error in the program under compilation.

[nshahan]

Thanks for the report. From my investigation this looks more like it is an issue with the method statically typed to return Object when running in sound mode. DDC has some code that needs to be updated with the change in the spec in regard to the Future value type for returns in async methods. I have a fix in progress.