void crash() {
    int *ptr = nullptr;
    *ptr = 42; // boom
}

void setupCrashTimer() {
    // Umgebungsvariable auslesen
    bool ok;
    int crashTimeApprox = qEnvironmentVariableIntValue("CRASH_PUPPET_APPROXIMATE_SECONDS", &ok);
    if (!ok)
        return;

    // use random time, so not all puppets are crashing at the same time
    std::srand(std::time(nullptr) + QCoreApplication::applicationPid());
    int randomOffset = std::rand() % 10;
    int crashTime = crashTimeApprox + randomOffset;

    QTimer::singleShot(crashTime * 1000, QCoreApplication::instance(), &crash);
}

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

    setupCrashTimer();

    MainWindow w;
    w.show();
    return a.exec();
}