[TrevorBurnham]

I'm pledging $1,000 to this. As the author of the PragProg book on CoffeeScript (http://pragprog.com/book/tbcoffee/coffeescript), I have a stake in making CoffeeScript a more mainstream tool, and I believe that Michael's project will greatly advance this cause.

The use of CoffeeScript has become fairly widespread at startups (GitHub, 37signals, many YC alums...) but not in larger enterprises. One reason for this is that debugging CoffeeScript requires a "hacker mentality": compile-time errors are often reported with minimal or misleading explanations (e.g. "Unexpected ," when there is no comma on the line, but rather an implicit comma from whitespace); run-time errors have to be manually traced from the compiled JS to the original CoffeeScript.

These flaws are likely to be ameliorated gradually (Jeremy has stated that Source Map support is the primary goal for CoffeeScript 1.4), but this project could improve the debugging situation dramatically in a matter of months. I hope the CoffeeScript community will lend Michael their support.