Recover from read errors.

dart/pkg/compiler/lib/src/warnings.dart

 // Copyright (c) 2011, 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;
 
 const DONT_KNOW_HOW_TO_FIX = "Computer says no!";
 
 /**
  * The messages in this file should meet the following guide lines:
@@ skipping 1497 matching lines @@
       // Don't know how to fix since the underlying error is unknown.
       howToFix: DONT_KNOW_HOW_TO_FIX,
       examples: const [
           """
 // 'foo.dart' does not exist.
 import 'foo.dart';
 
 main() {}
 """]);
 
+  static const MessageKind READ_SELF_ERROR = const MessageKind(
+      "#{exception}",
+      // Don't know how to fix since the underlying error is unknown.
+      howToFix: DONT_KNOW_HOW_TO_FIX);
+
   static const MessageKind EXTRANEOUS_MODIFIER = const MessageKind(
       "Can't have modifier '#{modifier}' here.",
       howToFix: "Try removing '#{modifier}'.",
       examples: const [
           "var String foo; main(){}",
           // "var get foo; main(){}",
           "var set foo; main(){}",
           "var final foo; main(){}",
           "var var foo; main(){}",
           "var const foo; main(){}",
@@ skipping 922 matching lines @@
   static String convertToString(value) {
     if (value is ErrorToken) {
       // Shouldn't happen.
       return value.assertionMessage;
     } else if (value is Token) {
       value = value.value;
     }
     return '$value';
   }
 }