mitchellh/vagrant — pull request #807 by calavera (2012-03-14 04:42:33+00:00)
Title: only move to the work directory once

Right now, every time that Vagrant wants to run a command it moves to the work directory. If two processes try to move to the directory at the same time it fails. It only needs to move to the work directory once though.

This patch fix this issue.