Comment 34 for bug 1489855

Ah great, thanks for testing! I've uploaded the fix to eoan just now. I guess after some testing we should think about backporting to bionic (although it's too late to try to get it into 18.04.3 now)

And it's interesting to hear why you're interest. The reason I am interested in this sort of thing is that I'm thinking about automatically creating a casper-rw partition if there is space for it and using it to store the installer logs even if the user hasn't selected persistence. (Because currently for the server installer there's no easy way for the user to get the logs off the live system in the case of an install failure).