Is this an issue ?

[dileep-costprize]

Getting when trying this

ErrorException in Arr.php line 94: array_flip(): Can only flip STRING and INTEGER values!

$this->order
->with($relations)
->pimp(null, ['sort[]' => 'id,asc']);

works fine when I use some array instead of null in the first argument

[jedrzej]

Which laravel version are you using?

[dileep-costprize]

Laravel version 5.0.16