gistfile1.txt

 Illuminate\Database\QueryException  : SQLSTATE[HY000]: General error: 1005 Can't create table `project`.`#sql-3c44_2f` (errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter table `comments` add constraint `comments_com_post_foreign` foreign key (`com_post`) references `posts` (`post_id`) on delete cascade)

  at E:\xampp\htdocs\laravel\Laravel\vendor\laravel\framework\src\Illuminate\Database\Connection.php:664
    660|         // If an exception occurs when attempting to run a query, we'll format the error
    661|         // message to include the bindings with SQL, which will make this exception a
    662|         // lot more helpful to the developer instead of just the database's errors.
    663|         catch (Exception $e) {
  > 664|             throw new QueryException(
    665|                 $query, $this->prepareBindings($bindings), $e
    666|             );
    667|         }
    668|

  Exception trace:

  1   PDOException::("SQLSTATE[HY000]: General error: 1005 Can't create table `project`.`#sql-3c44_2f` (errno: 150 "Foreign key constraint is incorrectly formed")")
      E:\xampp\htdocs\laravel\Laravel\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458

  2   PDOStatement::execute()
      E:\xampp\htdocs\laravel\Laravel\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458

  Please use the argument -v to see more details.

To Solve This problem

Just Add unsigned();
Look to this example
If you Want add foreign key to this

   $table->bigInteger('com_user');

Just Add unsigned()

   $table->bigInteger('com_user')->unsigned();