Popup closed signal emitted after destruction

import QtQuick 2.12
import QtQuick.Controls 2.12

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Component {
        id: popupComponent

        Popup {
            Button {
                text: 'pop'
                onClicked: stack.clear()
            }
        }
    }

    StackView {
        id: stack

        initialItem: Component {
            Item {
                Button {
                    text: 'open'

                    onClicked: {
                        const popup = popupComponent.createObject(this)

                        popup.Component.destruction.connect(() => {
                            console.log('destruction')
                        })

                        popup.closed.connect(() => {
                            console.log('closed')
                            popup.destroy()
                        })

                        popup.open()
                    }
                }
            }
        }
    }
}

qml: destruction
qml: closed
qrc:/main.qml:37: TypeError: Property 'destroy' of object TypeError: Type error is not a function