QProcess::start() causes SIGTRAP and then SISSEGV under GDB

#include <QCoreApplication>
#include <QProcess>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    auto p = new QProcess(qApp);
    p->start(QStringLiteral("/usr/bin/dd"), {"--help"});
    return a.exec();
}