Vagrant up fails occasionally.

[ifnull]

After passing -D to debug I was unable to reproduce the error.

Relevant part of error:

Configuration file `/etc/salt/minion'
 ==> File on system created by you or by a script.
 ==> File also in package provided by package maintainer.
 ==> Using current old file as you requested.
salt-minion start/running, process 4928
Setting up debconf-utils (1.5.42ubuntu1) ...
 *  INFO: Running install_ubuntu_restart_daemons()
salt-minion start/running, process 4928
salt-minion stop/waiting
salt-minion start/running, process 5165
salt-master start/running, process 4902
salt-master stop/waiting
salt-master start/running, process 5290
 *  INFO: Running daemons_running()
 * ERROR: salt-minion was not found running
 * ERROR: Failed to run daemons_running()!!!
 * ERROR: salt-minion was not found running. Pass '-D' for additional debugging information...
 * ERROR: salt-master was not found running. Pass '-D' for additional debugging information...

Complete log:
http://pastebin.com/raw.php?i=niPN1sLR