if (defined $self->pathname) {
        $self->io_handle(IO::File->new);
        $self->io_handle->open($self->pathname, @args) 
          or $self->throw($self->open_msg);
    }
    elsif (defined $self->_handle and
           not $self->io_handle->opened   # <-- line 88
          ) {
        # XXX Not tested
        $self->io_handle->fdopen($self->_handle, @args);
    }