From the crashing Krita department

[Michael Thaler]

Hi,

try the following:

open an image, add an adjustment layer to the image (I used the pixelize 
filter). Click on the original layer in the layer dialog box and paint 
something. The undo the painting and undo add layer. Krita's toolbox will 
become greyed out and you can't paint. I think this is already a bug and 
should be fixed. But next, try to add an adjustment layer again -> Krita 
crashes.

Greetings,
Michael