[Pkg-virtualbox-devel] Bug#813888: virtualbox: preinst stops reliably in chroots (Unit vboxweb.service not loaded)

[Rene Engelhard]

Package: virtualbox
Version: 5.0.14-dfsg-2
Severity: important

Hi,

on every dist-upgrade where virtualbox was involved the following happens in
my sid chroot:

1 (sid)root at frodo / # apt-get dist-upgrade                                   :(
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  libbasicusageenvironment0 libgroupsock1 libgsoap7 libilmbase6v5
  liblivemedia23 libopenexr6v5 libsodium13 libusageenvironment1
Use 'sudo apt autoremove' to remove them.
The following packages will be upgraded:
  virtualbox
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
Need to get 0 B/14.0 MB of archives.
After this operation, 429 kB disk space will be freed.
Do you want to continue? [Y/n] 
Retrieving bug reports... Done
Parsing Found/Fixed information... Done
Reading changelogs... Done
E: Can not write log (Is /dev/pts mounted?) - posix_openpt (2: No such file or directory)
(Reading database ... 403779 files and directories currently installed.)
Preparing to unpack .../virtualbox_5.0.14-dfsg-2+b1_amd64.deb ...
Failed to stop vboxweb.service: Unit vboxweb.service not loaded.
dpkg: warning: subprocess old pre-removal script returned error exit status 5
dpkg: trying script from the new package instead ...
Failed to stop vboxweb.service: Unit vboxweb.service not loaded.
dpkg: error processing archive /var/cache/apt/archives/virtualbox_5.0.14-dfsg-2+b1_amd64.deb (--unpack):
 subprocess new pre-removal script returned error exit status 5
vboxweb.service is a disabled or a static unit, not starting it.
Errors were encountered while processing:
 /var/cache/apt/archives/virtualbox_5.0.14-dfsg-2+b1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

This is a chroot (of a complete sid system).
So of course vboxweb is not running and never was active. When I boot that sid
system and do the dist-upgrade from there it works, but that is not the solution...

Maybe check whether the unit is loaded before trying to do something with it?

Regards,

Rene