When a container has errors on removal, it gets flagged as dead. If you `docker rm -f` a dead container the container is dereffed from the daemon and doesn't show up on `docker ps` anymore... except that the container JSON file may still be lingering around and becomes undead when you restart the daemon. Signed-off-by: Brian Goff <cpuguy83@gmail.com> Upstream-commit: c3c08f76bec023218b632e4c688ff9fcda11fcef Component: engine