/sbin/upstart:6:nih_error_clear:nih_error_pop_context:control_com_ubuntu_Upstart0_6_SetEnvList_method:nih_dbus_object_message:_dbus_object_tree_dispatch_and_unlock

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding upstart. This problem was most recently seen with package version 1.13.2-0ubuntu35, the problem page at https://errors.ubuntu.com/problem/fe43556eeeb93eeb7f28f52331468b0e9e3fc36e contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.