QConsoleApplication,aboutToQuit and "signal" do not hit the breakpoints...

[TorAn]

Following code, running in qtCreator (Windows 10) in the debug mode, does not reach breakpoints "brakepoint1" or "breakpoint2" upon clicking on "x" console window.
What can be the case?
Thanks!

#include <QCoreApplication>
#include <iostream>
#include <signal.h>
 
void cleanup(int sig)
{
    std::cout << sig << "quitting \n"; // breakpoint 2
}
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QObject::connect(&a, &QCoreApplication::aboutToQuit, [&]() {
        std::cout << "about to quit\n"; //breakpoint 1
    });
    signal(SIGINT, cleanup);
    signal(SIGABRT, cleanup);
    signal(SIGTERM, cleanup);
 
    std::cout<< "about to run\n";
    return a.exec();
    std::cout<< "exiting\n";
}

#include <QCoreApplication>
#include <iostream>
#include <signal.h>

void cleanup(int sig)
{
    std::cout << sig << "quitting \n"; // breakpoint 2
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QObject::connect(&a, &QCoreApplication::aboutToQuit, [&]() {
        std::cout << "about to quit\n"; //breakpoint 1
    });
    signal(SIGINT, cleanup);
    signal(SIGABRT, cleanup);
    signal(SIGTERM, cleanup);

    std::cout<< "about to run\n";
    return a.exec();
    std::cout<< "exiting\n";
}

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