Vm crashes on async error handling

[sigurdm]

r43804
This program:
import "dart:async";

foo() async {
  try {
    bool firstTime = true;
    while(true) {
      print("a");
      if (firstTime) {
        try {
          await new Future.value(3);
          print("b");
          throw "Error";
        } catch(error) {
          print(error);
          print("c");
          firstTime = false;
          continue;
        } finally {
          print("d");
        }
      } else {
        print("e");
        return;
      }
    }
  } finally {
    print("f");
  }
  print("g");
}

main() async {
  await foo();
}
Expected output:
a
b
Error
c
d
a
e
f

Prints:
a
b
Error
c
d
a
e
f
f
Unhandled exception:
Uncaught Error: The null object does not have a method 'complete'.

NoSuchMethodError: method not found: 'complete'
Receiver: null
Arguments: [null]
Stack Trace:

­0 Object._noSuchMethod (dart:core-patch/object_patch.dart:42)

­1 Object.noSuchMethod (dart:core-patch/object_patch.dart:45)

­2 foo.<foo_async_body> (file:///usr/local/google/home/sigurdm/test/main.dart)

­3 _asyncCatchHelper.<anonymous closure> (dart:core-patch/core_patch.dart:11)

­4 _RootZone.runBinary (dart:async/zone.dart:1160)

­5 _Future._propagateToListeners.handleError (dart:async/future_impl.dart:511)

­6 _Future._propagateToListeners (dart:async/future_impl.dart:570)

­7 _Future._completeError (dart:async/future_impl.dart:366)

­8 _Future._asyncCompleteError.<anonymous closure> (dart:async/future_impl.dart:421)

­9 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)

­10 _asyncRunCallback (dart:async/schedule_microtask.dart:48)

­11 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:96)

­12 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:143)

­0 _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:886)

­1 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)

­2 _asyncRunCallback (dart:async/schedule_microtask.dart:48)

­3 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:96)

­4 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:143)

[iposva-google]

Set owner to @crelier.
Removed Priority-Unassigned label.
Added Priority-High, Accepted labels.

[crelier]

After r44210, I am getting a new error:

a
b
Error
c
d
a
e
f
f
The null object does not have a method 'scheduleMicrotask'.

NoSuchMethodError: method not found: 'scheduleMicrotask'
Receiver: null
Arguments: [Closure: () => dynamic]
c
d
a
e
f
f
Unhandled exception:
Uncaught Error: Bad state: Future already completed
Stack Trace:
#­0 _Completer.completeError (dart:async/future_impl.dart:21)
#­1 foo.<foo_async_body> (file:///usr/local/google/home/regis/bug.dart:36:1)
#­2 _asyncCatchHelper.<anonymous closure> (dart:core-patch/core_patch.dart:15)
#­3 _RootZone.runBinary (dart:async/zone.dart:1160)
#­4 _Future._propagateToListeners.handleError (dart:async/future_impl.dart:511)
#­5 _Future._propagateToListeners (dart:async/future_impl.dart:570)
#­6 _Future._completeWithValue (dart:async/future_impl.dart:358)
#­7 _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:412)
#­8 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
#­9 _asyncRunCallback (dart:async/schedule_microtask.dart:48)
#­10 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:96)
#­11 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:143)

#­0 _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:886)
#­1 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
#­2 _asyncRunCallback (dart:async/schedule_microtask.dart:48)
#­3 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:96)
#­4 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:143)

Reassigning to Matthias.

---

Set owner to @mhausner.

[DartBot]

This comment was originally written by @mhausner

---

This works as expected now on bleeding_edge after r44465.

$ dart ~/tmp/e.dart
a
b
Error
c
d
a
e
f

---

Added Fixed label.