sub remove {
    my ($cpio, @filenames) = @_;
    $cpio->{list} or die "can't remove from nothing\n";

    # Create a lookup table of names to be removed
    my %filenames = map { $_ => 1 } @filenames;

    # This was the old, buggy code
    # @{$cpio->{list}} = grep { !$filenames{$_} } @{$cpio->{list}};

    # Remove the elements according to their name:
    @{$cpio->{list}} = grep { !$filenames{$_->name} } @{$cpio->{list}};
}