Improve error recovery in parser.

dart/frog/leg/tools/mini_parser.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.
 
 #library('parser');
 
 #import('../elements/elements.dart');
 #import('../scanner/scanner_implementation.dart');
 #import('../scanner/scannerlib.dart');
 #import('../tree/tree.dart');
@@ skipping 68 matching lines @@
       : new Parser(listener);
   try {
     Token token = scan(file);
     if (!options.scanOnly) parser.parseUnit(token);
   } catch (ParserError ex) {
     if (options.throwOnError) {
       throw;
     } else {
       print(ex);
     }
+  } catch (MalformedInputException ex) {
+    print('$filename: $ex');
+  } catch (var ex) {
+    print('Error in file: $filename');
+    throw;
   }
   if (options.buildAst) {
     MyNodeListener l = listener;
     if (!l.nodes.isEmpty()) {
       parserError('Stack not empty after parsing',
                   l.nodes.head.getBeginToken(), l.nodes.head.getEndToken(),
                   file);
     }
   }
   return bytes.length;
 }
 
 Token scan(MySourceFile source) {
   Scanner scanner = new ByteArrayScanner(source.rawText);
   try {
     return scanner.tokenize();
   } catch (MalformedInputException ex) {
     var message = ex.message;
     if (message is !String) message = "unexpected character";
-    Token fakeToken = new Token($QUESTION, scanner.charOffset);
+    Token fakeToken = new Token(QUESTION_INFO, scanner.charOffset);
     try {
       new MyListener(source).error(message, fakeToken);
     } catch (ParserError ex) {
       // TODO(ahe): Clean this up, don't throw exceptions.
       print(ex);
     }
     throw;
   }
 }
 
@@ skipping 177 matching lines @@
 String _GREEN_COLOR = '\u001b[32m';
 String _RED_COLOR = '\u001b[31m';
 String _MAGENTA_COLOR = '\u001b[35m';
 String _NO_COLOR = '\u001b[0m';
 
 class Mock {
   const Mock();
   bool get useColors() => true;
   internalError(message) { throw message.toString(); }
 }