Remove cancel and make crash exit with code 253.

sdk/lib/_internal/compiler/implementation/js_emitter/metadata_emitter.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.
 
 part of dart2js.js_emitter;
 
 class MetadataEmitter extends CodeEmitterHelper {
   /// A list of JS expressions that represent metadata, parameter names and
   /// type, and return types.
   final List<String> globalMetadata = [];
@@ skipping 11 matching lines @@
     if (!backend.retainMetadataOf(element)) return null;
     return compiler.withCurrentElement(element, () {
       var metadata = [];
       Link link = element.metadata;
       // TODO(ahe): Why is metadata sometimes null?
       if (link != null) {
         for (; !link.isEmpty; link = link.tail) {
           MetadataAnnotation annotation = link.head;
           Constant value = annotation.value;
           if (value == null) {
-            compiler.reportInternalError(annotation,
-                MessageKind.GENERIC, {'text': 'Annotation value is null'});
+            compiler.internalError(annotation, 'Annotation value is null.');
           } else {
             metadata.add(task.constantReference(value));
           }
         }
       }
       if (metadata.isEmpty) return null;
       return js.fun(
           [], [js.return_(new jsAst.ArrayInitializer.from(metadata))]);
     });
   }
@@ skipping 10 matching lines @@
           : jsAst.prettyPrint(task.constantReference(value), compiler)
               .getText();
       defaultValues.add(addGlobalMetadata(stringRepresentation));
     }
     return defaultValues;
   }
 
   int reifyMetadata(MetadataAnnotation annotation) {
     Constant value = annotation.value;
     if (value == null) {
-      compiler.reportInternalError(annotation,
-          MessageKind.GENERIC, {'text': 'Annotation value is null'});
+      compiler.internalError(annotation, 'Annotation value is null.');
       return -1;
     }
     return addGlobalMetadata(
         jsAst.prettyPrint(task.constantReference(value), compiler).getText());
   }
 
   int reifyType(DartType type) {
     jsAst.Expression representation =
         backend.rti.getTypeRepresentation(type, (variable) {
           return js.toExpression(
@@ skipping 50 matching lines @@
       // TODO(ahe): Why is metadata sometimes null?
       if (link != null) {
         for (; !link.isEmpty; link = link.tail) {
           metadata.add(reifyMetadata(link.head));
         }
       }
       return metadata;
     });
   }
 }