# this one will work here ....
has 'fail' => (isa => 'CodeRef', is => 'bare');
- has 'other_fail' => (metaclass => 'Thing::Meta::Attribute', is => 'bare');
+ has 'other_fail' => (metaclass => 'Thing::Meta::Attribute', is => 'bare', trigger => sub { });
package Bar;
use Moose;