This one I came across by accident.
Whilst working on a page, by mistake I dragged an image onto a master page layer. Didn't noticed until after a while.
As is the case with a master page layer, the items on it ae locked so couldn't just delete it. The mask also ins't on the actual master page, just on the layer representing the master page.
It's replicable for me:
- Open APub
- create blank new document
- on the first page (not the master page itself) add a mask to the (Master A) layer by clicking on the mask icon in the layers window
- open the (Master A) layer and right-click on the mask
- select Release Mask from the menu
That results in a crash each time here. in v1.7.0.283
Bert
Affinity Publisher Beta_2019-04-04-150809_Bowser.crash