struct Test {
    
    var ptrToInt: UnsafeMutablePointer<Int>
    
    init() {
        ptrToInt = UnsafeMutablePointer<Int>.allocate(capacity: 1)
        ptrToInt.initialize(to: 42)
    }
    
    func deleteValue() {
        ptrToInt.deinitialize(count: 1)
        ptrToInt.deallocate(capacity: 1)
    }
}

var x = [Test]()
var i = 0;
while(i < 1000000) {
    i = i + 1
    x.append(Test())
}
while(i > 0) {
    i = i - 1
    x.popLast()?.deleteValue()
}