importer is never called
It depends on how far the modules follow the common practices (look at their names). Try:

script.pl: 

#!/usr/bin/perl
use warnings;
use strict;

use Ugly ();

puke('Where does it come from?');

[download]

Ugly.pm: 

package Ugly;

use warnings;
use strict;

my $package = (caller)[0];

sub puke {
    warn @_;
}

{   no strict 'refs';
    *{$package . '::puke'} = \&puke;
}

__PACKAGE__

[download]
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^3: random undefined sub error by choroba
in thread random undefined sub error by jerick1976

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