I was attempting to search for a filter that I had made earlier, but I forgot that I had left my keyboard on the Cyrillic setting. When I typed into the search bar, the application crashed.
Later on, I tried it out by creating a filter with Cyrillic text in the title. That worked, but when I tried to use the search bar to find it, it didn't show up as a result and the application crashed.
It gave me an error upon crashing (attached below) 
The error dialog itself then creashed before I could click "send a bug report".