I'm getting this error message that is to vague for me to follow.

Goto undefined subroutine &Carp::longmess_real at /usr/share/perl5/Car
+p.pm line 35, <FH> line 1.
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My code base is large. I'll list the beginning parts since I think that might be the problem. First

#!/usr/bin/perl

BEGIN { push @INC, "/home/neil/perl5/lib/perl5" }

use strict;
use warnings;
use local::lib;
use Evolvethinking::Mymodule;
use POSIX 'strftime';
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And the module.

package Mymodule;
{
        use Mouse;
        use Mouse::Util::TypeConstraints;
        use Socket;
...
        subtype 'my_timestamp',
                => as 'Str',
                => where { m/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/ },
                => message { 'Not a valid timestamp. Expect: yyyy-mm-d
+d hh:mm' };
        has 'timestamp' => (
                is => 'ro',
                isa => 'my_timestamp'
         );
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Update

Carp::Any shows that my typing is working properly by returning an error. However, I wonder why the error was so vague.

Attribute (insert_class) does not pass the type constraint because: No
+t a valid class at /home/neil/perl5/lib/perl5/x86_64-linux-thread-mul
+ti/Mouse/Util.pm line 383, <FH> line 1.
        Mouse::Util::throw_error('Mouse::Meta::Attribute=HASH(0x161869
+8)', 'Attribute (insert_class) does not pass the type constraint be..
+.', 'data', '192_168_0_151', 'depth', -1) called at /home/neil/perl5/
+lib/perl5/x86_64-linux-thread-multi/Mouse/Util.pm line 383, <FH> line
+ 1.
        Mouse::Util::throw_error('Mouse::Meta::Attribute=HASH(0x161869
+8)', 'Attribute (insert_class) does not pass the type constraint be..
+.', 'data', '192_168_0_151', 'depth', -1) called at ./p1.pl line 35

....
        subtype 'my_insert_class',
                => as 'Str',
                => where { m/^[a-zA-Z0-9]+$/ },
                => message { '$_ is not a valid class' };
        has 'insert_class' => (
                is => 'rw',
                isa => 'my_insert_class'
        );
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Also, is there a way to have this typing do something other than exit? I'd really like to to just return none zero.