(Solved) Segmentation fault QMediaPlayer on exit

helthans

I have been struggling with a segmentation fault for quite a while and simply can't figure out where it comes from.
I have a videoplayer using Qt5.1 on Ubuntu 12.04 and it works as such as expected, except when I exit my application I get a segmentation fault.
In my main I have the following piece of code to exit my application
@
// Create a window to shut down the application
QWidget window;
QLabel *label = new QLabel("The video player application is running");
QPushButton *button = new QPushButton("&Stop player");
QObject::connect(button, SIGNAL(clicked()), &app, SLOT(quit()));
QVBoxLayout *layout = new QVBoxLayout(&window);
layout->addWidget(label);
layout->addWidget(button);
window.show();
@
And my videoplayer class looks like this:
@
#include <QMediaPlayer>
#include <QVideoWidget>
#include <QMediaPlaylist>

class QMediaPlaylist;
class QVideoWidget;

namespace VideoModule
{

class VideoPlayerPlugin : public QObject, VideoPlayer
{
Q_OBJECT

public:
explicit VideoPlayerPlugin(QObject *parent = 0);

bool selfTest() override;

bool initialize() override;
bool postInit() override;

QStringList diagnosticInfo() const override;
QObject *asQObject() override {return this;}

void startPlaying() override;

void stopPlaying() override;

void pausePlayback() override;

signals:
void aboutToFinish();

public slots:
void setNextFile(const QString &file) override;
void stopAndClear() override;

private slots:
void playerStateChanged(QMediaPlayer::State state);

private:
QMediaPlaylist *m_playlist;
QMediaPlayer *m_player;
QVideoWidget *m_video;
bool m_canPlay;
};
@

I have run gdb and the backtrace after getting the segmentation fault looks like this:
@
Program received signal SIGSEGV, Segmentation fault.
0xb1393bf3 in QMediaPlayer::~QMediaPlayer() () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Multimedia.so.5
(gdb) bt
#0 0xb1393bf3 in QMediaPlayer::~QMediaPlayer() () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Multimedia.so.5
#1 0xb1393c42 in QMediaPlayer::~QMediaPlayer() () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Multimedia.so.5
#2 0xb777ad8c in QObjectPrivate::deleteChildren() () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5
#3 0xb778017b in QObject::~QObject() () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5
#4 0xb1419890 in VideoModule::VideoPlayerPlugin::~VideoPlayerPlugin (this=0x82ddf50, __in_chrg=<optimized out>)
at ../../../MyPlayer/src/videoplayerplugin/videoplayerplugin.h:11
#5 0xb14198d5 in VideoModule::VideoPlayerPlugin::~VideoPlayerPlugin (this=0x82ddf50, __in_chrg=<optimized out>)
at ../../../MyPlayer/src/videoplayerplugin/videoplayerplugin.h:11
#6 0xb7744168 in ?? () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5
#7 0xb77482c4 in ?? () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5
#8 0xb72702fb in __cxa_finalize (d=0xb7972440) at cxa_finalize.c:56
#9 0xb755aec4 in ?? () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5
#10 0xb77f0c7d in _fini () from /xx/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5
#11 0xb7ffeff4 in ?? () from /lib/ld-linux.so.2
#12 0xb726ff51 in __run_exit_handlers (status=0, listp=0xb73e33e4, run_list_atexit=true) at exit.c:78
#13 0xb726ffdd in __GI_exit (status=0) at exit.c:100
#14 0xb72564db in __libc_start_main (main=0x804959c <main(int, char**)>, argc=1, ubp_av=0xbffff234,
init=0x804a4d0 <__libc_csu_init>, fini=0x804a540 <__libc_csu_fini>, rtld_fini=0xb7fed280 <_dl_fini>,
stack_end=0xbffff22c) at libc-start.c:258
#15 0x080494d1 in _start ()
@

Can anyone give me a hint if I might be missing something or what else I could be doing wrong?

EDIT: Found out the destructor tried to delete the same object twice...