2016-10-22 11:55 GMT+02:00 Aliaksei Syrel <alex.syrel@gmail.com>:

MozServices crash is intentional!
When you load Sparta using metacello it runs installer scripts and automatically starts services. But they are already running if you have Sparta installed.

I need to find a pretty solution for it. Actually it is complicated. Services can not just stop while image is running, because rendering would instantly crash. Imagine if Bloc is running on Sparta, playground is rendered on Sparta. And now you stop services to update. What should happen? :)

Just take fresh image. I will add an assertion to forbid Sparta installation if it is already installed.