Hitting Ctrl-C on minikube mount fails to unmount volume

[tstromberg]

% /usr/local/bin/minikube mount /tmp/700:/tmp/700
📁  Mounting /tmp/700 into /tmp/700 on the minikube VM
📌  This daemon process needs to stay alive for the mount to be accessible ...
ufs starting

If you hit Ctrl-C now, the VM still thinks the volume is mapped:

$ mount | grep 700 | grep /tmp/700
192.168.39.1 on /tmp/700 type 9p (rw,relatime,sync,dirsync,dfltuid=1001,dfltgid=1001,access=any,msize=65536,trans=tcp,noextend,port=43403)
$ stat /tmp/700
stat: cannot stat '/tmp/700': Input/output error

This means that subsequent changes to the mount point, such as uid/gid, might result in confusion within the host VM.