Handle deferred access of unserialized code.

pkg/compiler/lib/src/deferred_load.dart

 // Copyright (c) 2014, 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 deferred_load;
 
 import 'common/backend_api.dart' show Backend;
 import 'common/tasks.dart' show CompilerTask;
 import 'common.dart';
 import 'compiler.dart' show Compiler;
@@ skipping 331 matching lines @@
 
         // TODO(johnniwinther): Add only expressions that are actually needed.
         // Currently we have some noise here: Some potential expressions are
         // seen that should never be added (for instance field initializers
         // in constant constructors, like `this.field = parameter`). And some
         // implicit constant expression are seen that we should be able to add
         // (like primitive constant literals like `true`, `"foo"` and `0`).
         // See dartbug.com/26406 for context.
         treeElements
             .forEachConstantNode((Node node, ConstantExpression expression) {
+          if (compiler.serialization.isDeserialized(analyzableElement)) {
+            if (!expression.isImplicit && !expression.isPotential) {
+              // Enforce evaluation of [expression].
+              backend.constants.getConstantValue(expression);
+            }
+          }
+
           // Explicitly depend on the backend constants.
           if (backend.constants.hasConstantValue(expression)) {
             ConstantValue value =
                 backend.constants.getConstantValue(expression);
             assert(invariant(node, value != null,
                 message: "Constant expression without value: "
                     "${expression.toStructuredText()}."));
             constants.add(value);
           } else {
             assert(
@@ skipping 649 matching lines @@
     return result;
   }
 
   bool operator ==(other) {
     if (other is! _DeclaredDeferredImport) return false;
     return declaration == other.declaration;
   }
 
   int get hashCode => declaration.hashCode * 17;
 }