I was using grunt watch for less, and encountred a kind of bus error:
Running "watch" task Waiting... 54136 bus error grunt --stack
Turned out it is due to node version.
This is what you can do to update your node version to a latest stable version, using n (a node version management).
sudo npm cache clean –f sudo npm install -g n sudo n stable
As of writing,
node -v now gives me v0.10.26, and I can run grunt without the bus collision error.