* node.c (dump_node): dump kw_rest_arg too. * parse.y (block_param, f_arg): more kwrest patterns. [ruby-core:42455][Bug #5989] * parse.y (new_args_gen): no extra kw_rest_arg if no keyword rest arg. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34999 b2dd03c8-39d4-4d8f-98ff-823fe69b080e