gistfile1.pl

sub set_config {
    my $self = shift;
    my $config = My::Config->new;
    $self->app->log->debug( $config->test ); #yay
    $self->helper( config => sub { $config } );
    $self->log->debug( $self->config->test ); # Can't call method "test" on unblessed reference
}