Error message when stopping debugging of application based on Qt 4.8 and MinGW

1. Create a new Qt Widget Application project and configure it with MinGW-based Qt 4.8.0.
   I used Qt and MinGW from an old QtSDK.
2. Start debugging this application.
3. When you see the application's window, press the "Stop Debugger" button .
   You'll see an error message: "Application process could not be stopped: The program is not being run.":
   

This is not true, the program did run. You saw the window.
If this error message didn't appear, everything else would look fine.

Found by Squish test tst_simple_debug.