[Pkg-virtualbox-devel] Bug#800034: virtualbox-ext-pack: failed to uninstall

[Ronny Standtke]

Package: virtualbox-ext-pack
Version: 5.0.4-2~bpo8+1
Severity: normal

I created a local backport of virtualbox-ext-pack and included it in a
Debian Live build.
Unfortunately, the package then fails to uninstall or upgrade with the
following error message:
--------------------------------------
...
The following packages will be REMOVED:
  virtualbox-ext-pack
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 51.2 kB disk space will be freed.
Do you want to continue? [Y/n]
(Reading database ... 281514 files and directories currently installed.)
Removing virtualbox-ext-pack (5.0.4-2~bpo8+1) ...
0%...
Progress state: NS_ERROR_FAILURE
VBoxManage: error: Failed to uninstall "Oracle VM VirtualBox Extension Pack"
VBoxManage: error: The installer failed with exit code 1:
VBoxExtPackHelperApp: error: Failed to rename the extension pack
directory: VERR_NOT_SAME_DEVICE
VBoxManage: error: VBoxExtPackHelperApp: error: If the problem persists,
try running the command: VBoxManage extpack cleanup
VBoxManage: error: rcExit=1
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005),
component ExtPackManagerWrap, interface IExtPackManager
VBoxManage: error: Context: "RTEXITCODE handleExtPack(HandlerArg*)" at
line 1199 of file VBoxManageMisc.cpp
dpkg: error processing package virtualbox-ext-pack (--remove):
 subprocess installed pre-removal script returned error exit status 1
Errors were encountered while processing:
 virtualbox-ext-pack
E: Sub-process /usr/bin/dpkg returned an error code (1)
--------------------------------------

live-build (from Debian Live) creates a squashfs image out of a chroot
directory. This might explain the VERR_NOT_SAME_DEVICE error.
What I don't understand is why it is actually a problem that the system
is no longer on the same "device" as during installation time.


-- System Information:
Debian Release: 8.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 4.1.0-2-686-pae (SMP w/4 CPU cores)
Locale: LANG=de_CH.UTF-8, LC_CTYPE=de_CH.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages virtualbox-ext-pack depends on:
ii  debconf [debconf-2.0]  1.5.56
ii  virtualbox             5.0.4-dfsg-2~bpo8+2
ii  wget                   1.16-1

virtualbox-ext-pack recommends no packages.

virtualbox-ext-pack suggests no packages.

-- debconf information:
* virtualbox-ext-pack/license: true