— This is actually the d-function calling itself recursively, that expression is returned
— I think I might have it...
— It uses the ... operator to put arguments into d
— Doesn't JS reuse stack frames if the argument count isn't the same?
— First one , I guess, (c && d())
— Node doesn't apply the optimization
— Node v7.10.0
— Ahhh, I think I have the problem
— "Tail call optimization can only be made in strict mode"
— Nope, still doesn't work