Fix potential problem with expression evaluation.

runtime/vm/parser.cc

 // 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.
 
 #include "vm/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 1832 matching lines @@
     ConsumeToken();
     const intptr_t expr_pos = token_index_;
     AstNode* expr = ParseExpr(kAllowConst);
     ASSERT(expr != NULL);
     current_block_->statements->Add(new ReturnNode(expr_pos, expr));
   } else if (IsLiteral("native")) {
     ParseNativeFunctionBlock(&params, func);
   } else {
     UnexpectedToken();
   }
-  current_block_->statements->Add(CloseBlock());
-  SequenceNode* statements = CloseBlock();
-  return statements;
+  SequenceNode* body = CloseBlock();
+  current_block_->statements->Add(body);
+  return CloseBlock();
 }
 
 
 void Parser::SkipIf(Token::Kind token) {
   if (CurrentToken() == token) {
     ConsumeToken();
   }
 }
 
 
@@ skipping 5827 matching lines @@
 }
 
 
 void Parser::SkipNestedExpr() {
   const bool saved_mode = SetAllowFunctionLiterals(true);
   SkipExpr();
   SetAllowFunctionLiterals(saved_mode);
 }
 
 }  // namespace dart