Serialize and resynthesize unresolved constant instance creations.

pkg/analyzer/lib/src/summary/prelink.dart

 // Copyright (c) 2016, 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.
 
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/summary/name_filter.dart';
 
 /**
  * Create a [LinkedLibraryBuilder] corresponding to the given
@@ skipping 405 matching lines @@
         // then it must be the `String.length` property reference.
         if (namespace == null && reference.name == 'length') {
           ReferenceKind prefixKind = references[reference.prefixReference].kind;
           if (prefixKind == ReferenceKind.topLevelPropertyAccessor ||
               prefixKind == ReferenceKind.propertyAccessor) {
             references
                 .add(new LinkedReferenceBuilder(kind: ReferenceKind.length));
             continue;
           }
         }
+        // Anything prefixed with 'unresolved' is unresolved.
+        if (references[reference.prefixReference].kind ==
+            ReferenceKind.unresolved) {
+          namespace = const <String, _Meaning>{};
+        }
         // Prefix references must always point to proper prefixes.
         assert(namespace != null);
       }
       _Meaning meaning = namespace[reference.name];
       if (meaning != null) {
         if (meaning is _PrefixMeaning) {
           prefixNamespaces[i] = meaning.namespace;
         } else if (meaning is _ClassMeaning) {
           prefixNamespaces[i] = meaning.namespace;
         }
@@ skipping 63 matching lines @@
    * [sourceUri] is also relative.
    */
   String resolveUri(String sourceUri, String relativeUri) {
     if (sourceUri == null) {
       return relativeUri;
     } else {
       return Uri.parse(sourceUri).resolve(relativeUri).toString();
     }
   }
 }