Closured length as parameter causes error in JS mode

[brekk]

If the keyword length is used as a parameter and closured, it causes the compiled code to barf in Node / JS.

Code:

barfOnLength :: Integer -> Integer
export barfOnLength = (length) => length

main = () => {
  barfOnLength(6)
}

Error:

madlib/build/LengthBug.mjs:27
export let _08321_barfOnLength__1 = (length => _$_length_$_);
                                               ^

ReferenceError: _$_length_$_ is not defined

This doesn't seem to fail in LLVM and it doesn't throw an error unless invoked.

[aboeglin]

Closed by #151