Earlier quoted context omitted.
That's definitely more semantics that I thought it contained, thanks for the clarification. However for the same reasons the debugging problems are probably more severe than I realized before.
As I said elsewhere, unless you believe the CoffeeScript compiler is introducing bugs into correct code, I'm not sure I understand your concern. Does the fact that C has different semantics from machine code generally make debugging C harder than debugging machine code? There is still a very close relationship between the CoffeeScript and the JavaScript — closer than, say, what you get with GWT or Closure Compiler. T…
What I think the value of CoffeeScript could be is to show how Javascript could be improved in the next versions.