Fix returning from async functions.

runtime/vm/ast.cc

 // 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.
 
 #include "vm/ast.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
@@ skipping 49 matching lines @@
 }
 
 
 void SequenceNode::VisitChildren(AstNodeVisitor* visitor) const {
   for (intptr_t i = 0; i < this->length(); i++) {
     NodeAt(i)->Visit(visitor);
   }
 }
 
 
+void SequenceNode::Add(AstNode* node) {
+  if (node->IsReturnNode()) {
+    node->AsReturnNode()->set_scope(scope());
+  }
+  nodes_.Add(node);
+}
+
+
 void PrimaryNode::VisitChildren(AstNodeVisitor* visitor) const {
 }
 
 
 void ArgumentListNode::VisitChildren(AstNodeVisitor* visitor) const {
   for (intptr_t i = 0; i < this->length(); i++) {
     NodeAt(i)->Visit(visitor);
   }
 }
 
@@ skipping 552 matching lines @@
   if (result.IsError() || result.IsNull()) {
     // TODO(turnidge): We could get better error messages by returning
     // the Error object directly to the parser.  This will involve
     // replumbing all of the EvalConstExpr methods.
     return NULL;
   }
   return &Instance::ZoneHandle(Instance::Cast(result).raw());
 }
 
 }  // namespace dart