Added a test for dump-info with lots of closures.

sdk/lib/_internal/compiler/implementation/dump_info.dart

 // Copyright (c) 2013, 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 dump_info;
 
 import 'dart:convert' show
     HtmlEscape,
     JsonEncoder,
     StringConversionSink,
@@ skipping 174 matching lines @@
         'kind': 'typedef',
         'name': element.name
       };
   }
 
   Map<String, dynamic> visitFieldElement(FieldElement element) {
     String id = mapper._field.add(element);
     List<String> children = [];
     StringBuffer emittedCode = compiler.dumpInfoTask.codeOf(element);
 
+    TypeMask inferredType =
+        compiler.typesTask.getGuaranteedTypeOfElement(element);
     // If a field has an empty inferred type it is never used.
-    TypeMask inferredType =
-      compiler.typesTask.getGuaranteedTypeOfElement(element);
     if (inferredType == null || inferredType.isEmpty || element.isConst) {
       return null;
     }
 
     int size = compiler.dumpInfoTask.sizeOf(element);
     String code;
 
     if (emittedCode != null) {
       size += emittedCode.length;
       code = emittedCode.toString();
@@ skipping 381 matching lines @@
     };
 
     outJson['program'] = generalProgramInfo;
 
     ChunkedConversionSink<Object> sink =
       encoder.startChunkedConversion(
           new StringConversionSink.fromStringSink(buffer));
     sink.add(outJson);
   }
 }