Can't save model with empty array

[97mik]

I have a Fluent MySQL model:

final class SomeModel: MySQLModel {
    var id: Int?
    var someArray: [Int]

    init(id: Int? = nil, someArray: [Int]) {
        self.someArray = someArray
    }  
}

And when I am trying to save model with not empty array:

SomeModel(someArray: [1, 2]).save(on: req)

It is works.
But when I am trying to save same model with empty array (not nil):

SomeModel(someArray: []).save(on: req)

Then I get crash in MySQLDataEncoder.swift file, at 11 line, with error message: "Unexpectedly found nil while unwrapping an Optional value".
And I found that the same issue was in postgresql: vapor/postgres-kit#80