Fixes 2 tests and a crash

frog/scripts/tree_gen.py

 #!/usr/bin/env python
 # 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.
 
 '''Generates the many subtypes of Node as well as a NodeVisitor into
    tree.g.dart.'''
 
 from codegen import CodeWriter
 
@@ skipping 139 matching lines @@
   Expression('Binary', 'Token op, Expression x, Expression y'),
   Expression('Unary', 'Token op, Expression self'),
 
   Expression('Postfix', 'Expression body, Token op'),
 
   Expression('New',
     'bool isConst, TypeReference type, Identifier name,' +
     'List<ArgumentNode> arguments'),
 
   Expression('List',
-    'bool isConst, TypeReference type, List<Expression> values'),
+    'bool isConst, TypeReference itemType, List<Expression> values'),
   Expression('Map',
-    'bool isConst, TypeReference type, List<Expression> items'),
+    'bool isConst, TypeReference keyType, TypeReference valueType,' +
+    'List<Expression> items'),
 
   Expression('Conditional',
     'Expression test, Expression trueBranch, Expression falseBranch'),
 
   Expression('Is', 'bool isTrue, Expression x, TypeReference type'),
   Expression('Paren', 'Expression body'),
   Expression('Await', 'Expression body'),
 
   Expression('Dot', 'Expression self, Identifier name'),
   Expression('Var', 'Identifier name'),
@@ skipping 61 matching lines @@
   cw.writeln('var output;')
   cw.writeln('TreePrinter(this.output) { output.printer = this; }')
   for node in nodes:
     node.writePrettyPrintMethod(cw)
     cw.writeln()
   cw.exitBlock('}')
 
   cw.writeToFile('tree')
 
 if __name__ == '__main__': main()