Debug in console hangs forever

• Create a simple QT Console project
• put a breakpoint in the main()
• start a debug
• the console shows up and is empty while the "Launching debugger" progress bar not progressing : the process seems not starting waiting some event from qtcreator not allowing to debug

Note that this is not reproduced in 100% cases but seems to persist during hours.

I suspect some problems during the fork / communication process during the launch phase.