==9661== 1 errors in context 3 of 21:
==9661== Invalid write of size 1
==9661==    at 0x40503B: AudioReceiver::AudioReceiver(QByteArray, QObject*) (audioreceiver.cpp:9)
==9661==    by 0x409C40: MediaManager::MediaManager(QObject*) (mediamanager.cpp:7)
==9661==    by 0x402EEA: main (main.cpp:18)
==9661==  Address 0x98c4260 is 0 bytes after a block of size 80 alloc'd
==9661==    at 0x4C28B42: operator new(unsigned long) (vg_replace_malloc.c:261)
==9661==    by 0x409C2B: MediaManager::MediaManager(QObject*) (mediamanager.cpp:7)
==9661==    by 0x402EEA: main (main.cpp:18)


audioreceiver.h

...
private:
   bool is_initialized;


audioreceiver.cpp

AudioReceiver::AudioReceiver(QByteArray audio_url, QObject *parent) :
    QObject(parent)
{
    this->is_initialized = false;  // this is the line number 9