QtCreator crashes when two states have the same name

1. Create a new QML Application Project with the Wizard
2. Edit main.qml
3. Change to the designer for main.qml
4. Add two states
5. Rename the first added state to 'a'
6. Click the name of the second state to make it editable.
7. Change the text to 'a' but don't press enter
8. Move the mouse pointer out of editing scope on the top. Best is to move the mouse to the top of the screen without pressing a mouse button.
9. A message appears that you cannot use this name.
10. Click OK.
11. Repeating steps 6-10 about 10 to 20 times leads to a segmentation fault.