In this case I have no idea what caused crash, was doing stuff totally not related with crops, all I can read that is related with your plugin.
crash-2019-02-28_01.52.50-client.txt

Edit, crashes while trying to type c in nei, so it may be hotkey related bug as ctrl+c is shortcut for cropnalazer breed mode.
crash-2019-02-28_03.28.47-client.txt

Yeah this was an oversight from me. I will patch this when the other issue is solved too.