problem

    void addBuddy(const Buddy &buddy);

void BuddyModel::addBuddy(const Buddy &buddy)
{
    beginInsertRows(QModelIndex(), rowCount(), rowCount());
    m_buddies << buddy;
    endInsertRows();
}

/usr/include/qt5/QtCore/qlist.h:458: error: use of deleted function ‘Buddy::Buddy(const Buddy&)’
                 current->v = new T(*reinterpret_cast<T*>(src->v));
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/home/foidbgen/Qt Workspace/FishbookMesseenger/buddy.h:8: error: use of deleted function ‘QObject& QObject::operator=(const QObject&)’
 class Buddy : public QObject
       ^~~~~

/home/foidbgen/Qt Workspace/FishbookMesseenger/buddy.h:8: error: ‘QObject& QObject::operator=(const QObject&)’ is private within this context

/home/foidbgen/Qt Workspace/FishbookMesseenger/buddy.h:8: error: use of deleted function ‘QObject::QObject(const QObject&)’
 class Buddy : public QObject
       ^~~~~