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

Regards

Pavel