Fix several little buglets with stepping

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 "platform/utils.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
@@ skipping 2927 matching lines @@
   func.set_end_token_pos(end_token_pos);
   SequenceNode* body = CloseBlock();
   current_block_->statements->Add(body);
   innermost_function_ = saved_innermost_function.raw();
   last_used_try_index_ = saved_try_index;
   return CloseBlock();
 }
 
 
 void Parser::AddEqualityNullCheck() {
-  const intptr_t token_pos = Scanner::kDummyTokenIndex;
+  const intptr_t token_pos = TokenPos();

[Florian Schneider, 2014/01/20 11:36:28]

Undo this change.

   AstNode* argument =
       new LoadLocalNode(token_pos,
                         current_block_->scope->parent()->VariableAt(1));
   LiteralNode* null_operand =
       new LiteralNode(token_pos, Instance::ZoneHandle());
   ComparisonNode* check_arg = new ComparisonNode(token_pos,
                                                  Token::kEQ_STRICT,
                                                  argument,
                                                  null_operand);
   ComparisonNode* result = new ComparisonNode(token_pos,
@@ skipping 7791 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart