$ perl -v
This is perl 5, version 12, subversion 3 (v5.12.3) built for darwin-thread-multi-2level
(with 2 registered patches, see perl -V for more detail)
--truncated remaining output--


##</code><code>##

$ perlbrew list-modules | perlbrew exec --with perl-5.16.0t cpanm
perl-5.16.0t
==========
dyld: lazy symbol binding failed: Symbol not found: _Perl_Gthr_key_ptr
  Referenced from: /Users/abualiga/perl5/lib/perl5/darwin-thread-multi-2level/auto/Cwd/Cwd.bundle
  Expected in: flat namespace

dyld: Symbol not found: _Perl_Gthr_key_ptr
  Referenced from: /Users/abualiga/perl5/lib/perl5/darwin-thread-multi-2level/auto/Cwd/Cwd.bundle
  Expected in: flat namespace