Comment 2 for bug 807293

Crash is caused by assertion failure in job_process.c:849 (job_process_error_read).

Whilst the bug is investigated, we strongly recommend user jobs are disabled by changing /etc/dbus-1/system.d/Upstart.conf to, for example, the version of this file shipped by Ubuntu which disables user jobs:

http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/oneiric/upstart/oneiric/view/head:/dbus/Upstart.conf