await in frog: partial support for try-catch blocks

frog/tests/await/src/TryCatchNegativeTest.dart

Index: frog/tests/await/src/TryCatchNegativeTest.dart
diff --git a/frog/tests/await/src/TryCatchNegativeTest.dart b/frog/tests/await/src/TryCatchNegativeTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..1774e66b8c1a355c85f8a9ae8c233b06254a6d15
--- /dev/null
+++ b/frog/tests/await/src/TryCatchNegativeTest.dart
@@ -0,0 +1,21 @@
+// Copyright (c) 2011, 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.
+
+// Await within a try-catch block, no error occurs.
+
+#import("await_test_helper.dart");
+
+noerror() {
+  try {
+    final t = await futureOf(0);
+    return t;
+  } catch (e) {
+    return -1;
+  }
+}
+
+main() {
+  int t = await noerror();
+  Expect.notEquals(0, t);
+}