fstab mount with option "nofail" not working

[Alexander Bangert]

We need for our schroot environment a few initial mounts. This mounts are configured in the schroot config fstab file with the following parameters:

#/yocto-build /yocto-build none bind,defaults,nofail 0 0

Important for us is the option "nofail" because there are some temporary mounts which must not exist. This "nofail" option is working as follows with no errors as expected:
sudo mount -o nofail,bind /NOT_EXISTING_DIR /mnt

But with the configured option in the fstab for schroot the following errors appears:
E: 10mount: mount: /var/lib/schroot/mount/jessie/yocto-build is not mountpoint or bad option
E: 10mount:
E: 10mount: In some cases useful info is found in syslog - try
E: 10mount: dmesg | tail or so.
E: jessie: Chroot setup failed: stage=setup-start

There are no relevant syslog or dmesg entries...

Description: Ubuntu 16.04.1 LTS
Release: 16.04

schroot:
  Installiert: 1.6.10-1ubuntu3
  Installationskandidat: 1.6.10-1ubuntu3
  Versionstabelle:
 *** 1.6.10-1ubuntu3 500
        500 http://de.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

[Markus F. (mk.f)]

Try removing the 'defaults' option. The options contained in 'defaults' could be incompatible with the 'bind' option.

[Alexander Bangert (alex66955)]

I got the same behavior without the default option