Comment in multiline stanza breaks the job

[Removed by request]

I'm using Ubuntu 16.04 dev with upstart 1.13.2-0ubuntu21 and if a comment is used at the beginning of a line within a multiline stanza the job breaks. For example executing "initctl reload-configuration" and "dmesg | tail -n 1" shows on the following stanza the error "init: /etc/init/lxdm.conf:12: Expected token":

start on ((filesystem
           and runlevel [!06]
# and started dbus
           and (drm-device-added card0 PRIMARY_DEVICE_FOR_DISPLAY=1
                or stopped udev-fallback-graphics))
          or runlevel PREVLEVEL=S)