Serialize and resynthesize unresolved identifiers.

pkg/analyzer/lib/src/summary/resynthesize.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.
 
 library summary_resynthesizer;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 421 matching lines @@
           _pushMap(null);
           break;
         case UnlinkedConstOperation.makeTypedMap:
           TypeName keyType = _newTypeName();
           TypeName valueType = _newTypeName();
           _pushMap(AstFactory.typeArgumentList(<TypeName>[keyType, valueType]));
           break;
         case UnlinkedConstOperation.pushReference:
           EntityRef ref = uc.references[refPtr++];
           _ReferenceInfo info = resynthesizer.referenceInfos[ref.reference];
-          if (info.element != null) {
-            SimpleIdentifier node = AstFactory.identifier3(info.name);
-            node.staticElement = info.element;
-            _push(node);
-          } else {
-            throw new StateError('Unsupported reference ${ref.toMap()}');
-          }
+          SimpleIdentifier node = AstFactory.identifier3(info.name);
+          node.staticElement = info.element;
+          _push(node);
           break;
         case UnlinkedConstOperation.invokeConstructor:
           _pushInstanceCreation();
           break;
         case UnlinkedConstOperation.length:
           Expression target = _pop();
           SimpleIdentifier property = AstFactory.identifier3('length');
           property.staticElement =
               resynthesizer._buildStringLengthPropertyAccessorElement();
           _push(AstFactory.propertyAccess(target, property));
@@ skipping 1378 matching lines @@
         containingReference = unlinkedUnit.references[i].prefixReference;
       } else {
         name = linkedUnit.references[i].name;
         containingReference = linkedUnit.references[i].containingReference;
       }
       Element element;
       DartType type;
       int numTypeParameters = linkedReference.numTypeParameters;
       if (linkedReference.kind == ReferenceKind.unresolved) {
         type = summaryResynthesizer.typeProvider.undefinedType;
-        element = type.element;
+        element = null;
       } else if (name == 'dynamic') {
         type = summaryResynthesizer.typeProvider.dynamicType;
         element = type.element;
       } else if (name == 'void') {
         type = VoidTypeImpl.instance;
         element = type.element;
       } else {
         List<String> locationComponents;
         if (containingReference != 0 &&
             referenceInfos[containingReference].element is ClassElement) {
@@ skipping 324 matching lines @@
                 }
               : () => this.element;
       // TODO(paulberry): Is it a bug that we have to pass `false` for
       // isInstantiated?
       return new DeferredFunctionTypeImpl(computer, null, typeArguments, false);
     } else {
       return null;
     }
   }
 }