Comment 24 for bug 1222705

Confirmed, same happened in an emulator, example to reproduce:

$ sudo ubuntu-emulator create --channel=ubuntu-touch/devel-proposed --arch=i386 devel-proposed
# several minutes later
$ ubuntu-emulator run devel-proposed
# a couple minutes later you should see the wizard, go through it and wait for unity8 to appear
$ adb devices
$ phablet-shell -s emulator-5554
phablet $> restart unity8
restart: Connection was disconnected before a reply was received

Unfortunately apport doesn't seem to collect the .crash.