[es6] Make sure temporaries are not allocated in block scope

src/pattern-rewriter.cc

Index: src/pattern-rewriter.cc
diff --git a/src/pattern-rewriter.cc b/src/pattern-rewriter.cc
index 6969cf214ed70034fce8f58a737724ab4b600700..10702d65cee6a49c1db4aa0029cff66a868d496e 100644
--- a/src/pattern-rewriter.cc
+++ b/src/pattern-rewriter.cc
@@ -214,8 +214,8 @@ void Parser::PatternRewriter::VisitVariableProxy(VariableProxy* pattern) {
 
 
 Variable* Parser::PatternRewriter::CreateTempVar(Expression* value) {
-  auto temp_scope = descriptor_->parser->scope_->DeclarationScope();
-  auto temp = temp_scope->NewTemporary(ast_value_factory()->empty_string());
+  auto temp = descriptor_->parser->scope_->NewTemporary(
+      ast_value_factory()->empty_string());
   if (value != nullptr) {
     auto assignment = factory()->NewAssignment(
         Token::ASSIGN, factory()->NewVariableProxy(temp), value,