Version 0.5.14.3 .

sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart

 // Copyright (c) 2012, 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.
 
 part of js_backend;
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
@@ skipping 1477 matching lines @@
       bool needsAccessor = (needsGetter || needsSetter);
       // We need to output the fields for non-native classes so we can auto-
       // generate the constructor.  For native classes there are no
       // constructors, so we don't need the fields unless we are generating
       // accessors at runtime.
       if (!classIsNative || needsAccessor) {
         buffer.write(separator);
         separator = ',';
         if (compiler.mirrorsEnabled) {
           var metadata = buildMetadataFunction(member);
-          fieldMetadata.add(metadata);
           if (metadata != null) {
             hasMetadata = true;
+          } else {
+            metadata = new jsAst.LiteralNull();
           }
+          fieldMetadata.add(metadata);
         }
         if (!needsAccessor) {
           // Emit field for constructor generation.
           assert(!classIsNative);
           buffer.write(name);
         } else {
           // Emit (possibly renaming) field name so we can add accessors at
           // runtime.
           buffer.write(accessorName);
           if (name != accessorName) {
@@ skipping 1837 matching lines @@
 
 const String HOOKS_API_USAGE = """
 // The code supports the following hooks:
 // dartPrint(message)   - if this function is defined it is called
 //                        instead of the Dart [print] method.
 // dartMainRunner(main) - if this function is defined, the Dart [main]
 //                        method will not be invoked directly.
 //                        Instead, a closure that will invoke [main] is
 //                        passed to [dartMainRunner].
 """;