threads::shared::share behaves differently when imported or not

if I 'use threads::shared', share() works as documented:

perl-5.8.1-ithread -le 'use threads; use threads::shared; my $x; share($x); $x 
= 1;'

perl-5.8.1-ithread -le 'use threads; use threads::shared; my $x; 
threads::shared::share($x); $x = 1;'

However if I 'require threads::shared', it doesn't work the same way:

perl-5.8.1-ithread -le 'use threads; require threads::shared; my $x; 
threads::shared::share($x); $x = 1;'
Argument to share needs to be passed as ref at -e line 1.

If I pass \$x it works.

If I explicitly import share it doesn't.

perl-5.8.1-ithread -le 'use threads; require threads::shared; 
threads::shared->import(qw(share)); my $x; share($x); $x = 1;'
Argument to share needs to be passed as ref at -e line 1.

why?

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Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
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