Let's have a useless but simple example program:

#include <QtGui/QApplication>

int main(int argc, char *argv[])
{
    QApplication app(argc,    // set breakpoint here
                     argv);
    app.exec();
}

Placing a breakpoint in line 5 won't have any effect. To stop at the ctor of app, one must place the breakpoint in line 6.

Instead, Creator should move the breakpoint to the next line as when debugging with gdb.