Created attachment 108697 [details]
Downloads tab with string in the filter field

Application: kmldonkey (2.0.5)
KDE Platform Version: 4.14.34
Qt Version: 4.8.7
Operating System: Linux 4.13.0-16-generic x86_64
Distribution: Ubuntu 17.10
Desktop environment: Xfce 4.12.3

-- Information about the crash:
On the Downloads tab, if I enter a filter string to restrict the files shown, and then clear the string, either backspacing each character or clicling on the clear field icon, kmldonkey segfaults.

-- The crash can be reproduced every time:
1. Open the Downloads tab
2. Write any string in the filter field (I've attached a screenshot showing the string "mingus" in the filter field)
3. Clear it, either backspacing each character, or clicking on the clear field icon

-- Backtrace:
A useful backtrace could not be generated. I followed the assistant many times but it always finished saying that the backtrace generated was not useful.