Await it!

tests/language/await_future_test.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// VMOptions=--enable_async --optimization-counter-threshold=5
+
+import 'package:expect/expect.dart';
+
+import 'dart:async';
+
+// It does not matter where a future is generated.
+bar(p) async => p;
+baz(p) => new Future(() => p);
+
+foo() async {
+  var b = 0;
+  for(int i = 0; i < 10; i++) {
+    b += (await bar(1)) + (await baz(2));
+  }
+  return b;
+}
+
+quaz(p) async {
+  var x = 0;
+  try {
+    for (var j = 0; j < 10; j++) {
+      x += await baz(j);
+    }
+    return x;
+  } finally {
+    Expect.equals(x, 45);
+    return p;
+  }
+}
+
+quazz() async {
+  var x = 0;
+  try {
+    try {
+      x = await bar(1);
+      throw x;
+    } catch (e1) {
+      var y = await baz(e1 + 1);
+      throw y;
+    }
+  } catch (e2) {
+    return e2;
+  }
+}
+
+main() async {
+  var result;
+  for (int i = 0; i < 10; i++) {
+    result = await foo();
+    Expect.equals(result, 30);
+    result = await quaz(17);
+    Expect.equals(result, 17);
+    result = await quazz();
+    Expect.equals(result, 2);
+  }
+}