为什么Win32::TieRegistry不能列出子键?

$ perl -e '
my %RegHash;
use Win32::TieRegistry( TiedHash => \%RegHash );
use Data::Dumper;
my $Key = $RegHash{"HKEY_CURRENT_USER"};
print Dumper $Key;'
$VAR1 = bless( {}, 'Win32::TieRegistry' );

这适用于子密钥:

$ perl -e '
my %RegHash;
use Win32::TieRegistry( TiedHash => \%RegHash );
use Data::Dumper;
my $Key = $RegHash{"HKEY_CURRENT_USER\\Software"};
print Dumper $Key;'
$VAR1 = bless( {}, 'Win32::TieRegistry' );

我们可以打印密钥的信息:

$ perl -e '
my %RegHash;
use Win32::TieRegistry( TiedHash => \%RegHash );
use Data::Dumper;
my $Key = $RegHash{"HKEY_CURRENT_USER\\Software"};
print Dumper $Key->Information;'
$VAR1 = 'CntSubKeys';
$VAR2 = 48;
$VAR3 = 'MaxSubClassLen';
$VAR4 = 21;
...

然而,文档暗示我们可以通过将其视为哈希来简单地列出子键:

$ perl -e '
my %RegHash;
use Win32::TieRegistry( TiedHash => \%RegHash );
use Data::Dumper;
my $Key = $RegHash{"HKEY_CURRENT_USER\\Software"};
print Dumper keys %$Key; '

但是数组是空的。是坏了还是我做错了什么?是否有其他方法列出子密钥?

$ perl -e '
my %RegHash;
use Win32::TieRegistry( TiedHash => \%RegHash );
use Data::Dumper;
my $Key = $RegHash{"HKEY_CURRENT_USER\\Software"};
print Dumper $Key->SubKeyNames;'
Can't use an undefined value as an ARRAY reference at
/usr/lib/perl5/vendor_perl/5.8/cygwin/Win32/TieRegistry.pm line 720.