Qt5, не проходит сигнал/слот

#ifndef CLASSES_HPP
#define CLASSES_HPP
#include <QObject>
#include <QTextStream>
#include <QThread>

#include <iostream>


/// controller
class Controller: public QObject {
    Q_OBJECT
public:
    Controller(QObject *parent = Q_NULLPTR ): QObject(parent),m_enable(false){
        std::cout << "Controller" << std::endl;
    }
    ~Controller(){
        std::cout << "~Controller" << std::endl;
    }

public slots:
    void put( const QString & msg ){
        QString str( msg );
        std::cout << str.toStdString() << std::endl;
    }
};
/// Writer
class Writer : public QObject {
    Q_OBJECT

signals:
    void send( const QString & msg );

public:
    Writer( QObject * parent = 0 ): QObject(parent){
        std::cout << "Writer" << std::endl;

    }
    ~Writer(){
        std::cout << "~Writer" << std::endl;
    }

public slots:
    void write(){
        QThread *   pthread = QThread::currentThread();
        for ( int i=0; i<1000; i++ ){
            QString str;
            QTextStream( &str ) << "write: " << i;
            emit send( str );
        }
        pthread->quit();
    }
};
#endif // CLASSES_HPP

main.cpp

#include <QCoreApplication>
#include "classes.hpp"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    Controller ctrl( &a );

    ctrl.put( QString("step1") );
    ctrl.put( QString("step2") );

    QThread * pThread = new QThread( &a );
    Writer * pWriter = new Writer( 0 );
    pWriter->moveToThread( pThread );

    QObject::connect(pThread, &QThread::finished,   pWriter,    &QObject::deleteLater );
    QObject::connect(pThread, &QThread::finished,   pThread,    &QObject::deleteLater );
    QObject::connect(pWriter, &Writer::send,        &ctrl,      &Controller::put, Qt::BlockingQueuedConnection/*Qt::QueuedConnection*/ );
    QObject::connect(pThread, &QThread::started,    pWriter,    &Writer::write );

    pThread->start();

    std::cout << "started" << std::endl;
    pThread->wait();
    std::cout << "waited" << std::endl;

    delete pThread;

    return 0;
}

Если указан Qt::BlockingQueuedConnection, то программа лочится на первом emit send во врайтере, если просто Qt::QueuedConnection, то
цикл пролетает и слот контроллера не вызывается. Где собака порылась?
Спасибо