assertion failure on shutdown in Mouse::updateVMMDevMouseCaps(uint32_t, uint32_t)

[Mike Kupfer]

I noticed the following messages in VBox.log while trying to figure out why virtualbox occasionally segfaults while shutting down an Ubuntu 11.10 guest. I'm not sure whether this is related to the segfaults or a different issue. The message implies I should report it, so here it is.

03:05:39.522 ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={05044a52-7811-4f00-ae3a-0ab7ff707b10} aComponent={Mouse} aText={Assertion failed: [pVMMDevPort] at '/build/buildd/virtualbox-4.1.2-dfsg/src/VBox/Main/src-client/MouseImpl.cpp' (182) in nsresult Mouse::updateVMMDevMouseCaps(uint32_t, uint32_t).
03:05:39.522 Please contact the product vendor!}, preserve=false
03:05:39.523 Changing the VM state from 'DESTROYING' to 'TERMINATED'.

Host is running Ubuntu 11.10, with current set of updates.
x86_64 hardware.

$ apt-cache policy virtualbox
virtualbox:
  Installed: 4.1.2-dfsg-1ubuntu1
  Candidate: 4.1.2-dfsg-1ubuntu1
  Version table:
 *** 4.1.2-dfsg-1ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/universe amd64 Packages
        100 /var/lib/dpkg/status

[Mike Kupfer (mkupfer37)]

Forgot to mention--the guest additions are installed on the guest. And FWIW it's actually an Xubuntu 11.10 guest, not Ubuntu.

[Mike Kupfer (mkupfer37)]

Sorry for the dribbled information...the guest is 32-bit, and was imported from a 32-bit host.