missing support of named convention for procedures

Hi

create or replace procedure proc2(in a int, in b int)
as $$
begin
  a := a * 10;
  b := b * 10;
end;
$$ language plpgsql;

postgres=# call proc2(a => 10,b => 20);
ERROR:  XX000: unrecognized node type: 107
LOCATION:  ExecInitExprRec, execExpr.c:2114