use Mojolicious::Lite;

helper route_url => sub {
    my $c = shift;

    app->log->info($c->url_for('test')->to_abs);  # generates errors
};


app->route_url;


get '/test' => sub {
    my $c = shift;

    $c->render( text => $c->url_for('test')->to_abs );  # works
};


app->start;