Handle deserialized compilation of closures

pkg/compiler/lib/src/serialization/modelz.dart

 // Copyright (c) 2015, 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.
 
 /// Implementation of the element model used for deserialiation.
 ///
 /// These classes are created by [ElementDeserializer] triggered by the
 /// [Deserializer].
 
 library dart2js.serialization.modelz;
@@ skipping 730 matching lines @@
     if (_parameters == null) {
       _parameters = _decoder.getElements(Key.PARAMETERS, isOptional: true);
     }
     return _parameters;
   }
 }
 
 abstract class FunctionTypedElementMixin
     implements FunctionElement, DeserializedElementZ {
   @override
-  AsyncMarker get asyncMarker => _unsupported('asyncMarker');
-
-  @override
   FunctionElement asFunctionElement() => this;
 
   @override
   bool get isExternal {
     return _decoder.getBool(Key.IS_EXTERNAL,
         isOptional: true, defaultValue: false);
   }
 }
 
 abstract class ClassElementMixin implements ElementZ, ClassElement {
@@ skipping 569 matching lines @@
 
 abstract class MemberElementMixin
     implements DeserializedElementZ, MemberElement {
   @override
   MemberElement get memberContext => this;
 
   @override
   Name get memberName => new Name(name, library);
 
   @override
-  List<FunctionElement> get nestedClosures => const <FunctionElement>[];
+  List<FunctionElement> get nestedClosures => <FunctionElement>[];
 }
 
 abstract class FieldElementZ extends DeserializedElementZ
     with
         AnalyzableElementMixin,
         AstElementMixin,
         TypedElementMixin,
         MemberElementMixin
     implements FieldElement {
   bool _isConst;
@@ skipping 145 matching lines @@
     implements LocalFunctionElement {
   LocalFunctionElementZ(ObjectDecoder decoder) : super(decoder);
 
   @override
   accept(ElementVisitor visitor, arg) {
     return visitor.visitLocalFunctionElement(this, arg);
   }
 
   @override
   ElementKind get kind => ElementKind.FUNCTION;
+
+  @override
+  AsyncMarker get asyncMarker {
+    return _decoder.getEnum(Key.ASYNC_MARKER, AsyncMarker.values);
+  }
 }
 
 abstract class GetterElementZ extends DeserializedElementZ
     with
         AnalyzableElementMixin,
         AstElementMixin,
         FunctionTypedElementMixin,
         ParametersMixin,
         TypedElementMixin,
         MemberElementMixin
@@ skipping 561 matching lines @@
   }
 
   @override
   ElementKind get kind => ElementKind.PREFIX;
 
   @override
   Element lookupLocalMember(String memberName) {
     return _unsupported('lookupLocalMember');
   }
 }