For this code:
function neverGonna(giveYouUp){ return neverGonna(letYouDow) }; neverGonna(letYouDow = neverGonna)
This was the error:
[eval]:13
};neverGonna(letYouDow = neverGonna);
^
ReferenceError: letYouDow is not defined
at [eval]:13:24
at Object.exports.runInThisContext (vm.js:54:17)
at _eval (/usr/lib/node_modules/babel/bin/_babel-node:54:13)
at Object.<anonymous> (/usr/lib/node_modules/babel/bin/_babel-node:74:16)
at Module._compile (module.js:426:26)
at Object.Module._extensions..js (module.js:444:10)
at Module.load (module.js:351:32)
at Function.Module._load (module.js:306:12)
at Function.Module.runMain (module.js:467:10)
at startup (node.js:117:18)
at node.js:946:3