crash when calling pause() in onPositionChanged

import QtQuick 2.5
import QtQuick.Window 2.2
import QtMultimedia 5.5

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Video {
           id: v1
           anchors.fill:  parent
           source: "http://devimages.apple.com/iphone/samples/bipbop/gear1/prog_index.m3u8"
           onStatusChanged: console.log("Status V1 "+status + "//" + MediaPlayer.Buffering)
           onAvailabilityChanged: console.log("Availability V1 "+availability)
           onErrorChanged: console.log("Error V1 "+error + "//"+ errorString)
           onPlaybackStateChanged: console.log("PlaybackState V1 "+playbackState)

           onPositionChanged: pause()
       }

    Component.onCompleted: {
        v1.play()
    }

}