Laravel 5: Handling Dynamic and Static routes

Is there a way in Laravel5 where I could define routes that handles dynamic routes without conflicting with current static routes? Something similar below:

// Dynamic routes
Route::get('{permalink}', function($permalink) {
   //look for matching username on the table (bind perhaps?)
});

// Static routes
Route::get('home', 'HomeController@index');
Route::get('products', 'ProductController@index');

I tried something similar above but I keep on getting this error:

Serialization of 'Closure' is not allowed.

Any ideas, guys? Thanks.

via Chebli Mohamed