File watching compiler.

dart/pkg/dart2js_incremental/lib/dart2js_incremental.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 dart2js_incremental;
 
 import 'dart:async' show
     EventSink,
     Future;
 
@@ skipping 23 matching lines @@
     LibraryUpdater,
     Logger;
 
 import 'package:compiler/src/js/js.dart' as jsAst;
 
 part 'caching_compiler.dart';
 
 const List<String> INCREMENTAL_OPTIONS = const <String>[
     '--disable-type-inference',
     '--incremental-support',
+    '--generate-code-with-compile-time-errors',
     '--no-source-maps', // TODO(ahe): Remove this.
 ];
 
 class IncrementalCompiler {
   final Uri libraryRoot;
   final Uri packageRoot;
   final CompilerInputProvider inputProvider;
   final DiagnosticHandler diagnosticHandler;
   final List<String> options;
   final CompilerOutputProvider outputProvider;
@@ skipping 104 matching lines @@
   }
 }
 
 class IncrementalCompilationFailed {
   final String reason;
 
   const IncrementalCompilationFailed(this.reason);
 
   String toString() => "Can't incrementally compile program.\n\n$reason";
 }