BSON crash

BSONCrash.swift

import BSON

struct Henk : Codable {
    struct Location : Codable {
        var name = "JFdkljfds"
        var street = "Harrieboblaan 1"
        var postalCode = "1234 AB"
    }
    
    var _id = ObjectId()
    var description: String? = nil
    var location = Location()
}

let encoder = BSONEncoder()
var document = try! encoder.encode(Henk())

document["location", "name"] = nil
document["location", "street"] = nil

// Error while parsing BSON document: element type unknown at position 51.
// Doesn't happen when you create a new Document with the same data – probably a caching issue