FolderDialog open /dev/block/xxx crash

void QQuickFileDialogDelegatePrivate::chooseFile()
{
...

Q_ASSERT(fileDialog);
}

import QtQuick
import QtQuick.Controls
import QtQuick.Dialogs

ApplicationWindow {
    width: 480
    height: 272
    visible: true
    title: "test FolderDialog"

    Button {
        text: "folder"

        onClicked: {
            dlgSaveDir.open()
        }
    }

    FolderDialog {
        id: dlgSaveDir
        currentFolder: StandardPaths.standardLocations(StandardPaths.PicturesLocation)[0]
        onAccepted: {
            console.log("set folder to: " + selectedFolder)
            saveModel.url = selectedFolder
        }
    }
}