Initial support for length guards on final fields.

runtime/vm/parser.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/parser.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
@@ skipping 2069 matching lines @@
       }
     }
 
     if (found) continue;
 
     if (field.is_final()) {
       ErrorMsg("final field '%s' not initialized",
                String::Handle(field.name()).ToCString());
     } else {
       field.UpdateCid(kNullCid);
+      field.UpdateLength(Field::kNoLength);
     }
   }
 }
 
 
 AstNode* Parser::ParseExternalInitializedField(const Field& field) {
   // Only use this function if the initialized field originates
   // from a different class. We need to save and restore current
   // class, library, and token stream (script).
   ASSERT(current_class().raw() != field.origin());
@@ skipping 8217 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart