sub scrub_package {
    no strict 'refs';
    my $pack = shift;
    die "Shouldn't delete main package"
        if $pack eq "" || $pack eq "main";
    my $stash = *{$pack . '::'}{HASH};
    my $name;
    foreach $name (keys %$stash) {
        my $fullname = $pack . '::' . $name;
        # Get rid of everything with that name.
        undef $$fullname;
        undef @$fullname;
        undef %$fullname;
        undef &$fullname; # or *$fullname = sub { }
        undef *$fullname;
    }
}