Qt Creator debugger hangs

PBNeves

I'm starting to code with Qt Creator but I'm having problems using the debugger because it hangs :(
I can start the debugger an break to the main function. My main function is :

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

When i start debugging it runs to the first line and i can choose step over, but on the line MainWindow w it hangs and in the debugger log apears:

s[Thread debugging using libthread_db enabled]
>~"Using host libthread_db library \"/lib64/libthread_db.so.1\".\n"

NON-CRITICAL TIMEOUT
COMMANDS STILL IN PROGRESS:

It seams a gdb timeout, but I have no idea what is going wrong, so any help will be appreciate.
I'm using Slackware Linux 64 bits and Qt creator 4.1.0.

Thanks.

[Edit: Added code tags -- @Wieland]

PBNeves

Unchecking the option "Load .gdbinit on startup" on Tools->options->Debugger->GDB solved the problem.
Thank you.