parse.y: duplicated kwrest name

* parse.y (f_kwrest): reject duplicated kwrest argument name.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38724 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index f9e832996e..56c9425a29 100644
--- a/parse.y
+++ b/parse.y
@@ -4682,6 +4682,7 @@ kwrest_mark	: tPOW
 
 f_kwrest	: kwrest_mark tIDENTIFIER
 		    {
+			shadowing_lvar(get_id($2));
 			$$ = $2;
 		    }
 		;