tree a0c32e0ee2625a45d2110fcfdd0a291c22b405bb
parent f754b8c5720cfde014adf4a7b12e8ca063584faf
author Jens Johansen <jensj@google.com> 1533623728 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1533623728 +0000

Use the position on as when issuing AssertAssignable for as

E.g. the following program gives a type error, but previously didn't
tell what line had an error. This CL fixes the issue.

```
import "dart:async";

Future<Object> foo() {
  return Future.value("hello");
}

main() async {
  int x = await foo();
}
```

Change-Id: I27ae483b8b7ca63b9efac555a5cbc651296f227a
Reviewed-on: https://dart-review.googlesource.com/68367
Reviewed-by: Kevin Millikin <kmillikin@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>