Run coffee-script inside nodejs with source-map support: run time error stack trace will display the original location in coffee-script source. The heavy-lifting is done by module "source-map-support", this module merely provides some plumbing to simply the process. The main simplification is that cnode does not require your to modify your original coffee-script source code (as source-map-support does).
npm install cnode
cnode myapp.coffee cnode myapp.js cnode myapp <=== same as cnode myapp.coffee