How to reproduce:
- Insert a smartcard and open the Smartcard view
- Open menu for a slot and choose Generate New Key
- Proceed to the algorithm selection but don't click OK
- Unplug card and re-plug it
- Now click OK in the algorithm selection window
-> You get an error that the card was not found.
- Click OK
-> crash
Note: Re-plugging the card isn't required to provoke the crash.