I can confirm that this issue also occurs with a fresh (debootstrap) installation of pure Debian stretch.
I can also confirm that these four commands will reboot into the new init system without damaging the mounted filesystems: `echo 1 > /proc/sys/kernel/sysrq` `echo s > /proc/sysrq-trigger` `echo u > /proc/sysrq-trigger` `echo b > /proc/sysrq-trigger` Would it be appropriate to provide these commands for temporary use after switching init? I can attempt an NMU but I am relatively unskilled with Debian packaging so it may take a while. -- Matthew T. Hoare