[Trying to do this](http://rollupjs.org/#%7B%22options%22%3A%7B%22format%22%3A%22cjs%22%2C%22moduleName%22%3A%22myBundle%22%2C%22globals%22%3A%7B%7D%7D%2C%22modules%22%3A%5B%7B%22name%22%3A%22main.js%22%2C%22code%22%3A%22const%20defaultGreeting%20%3D%20'Hello'%3B%5Cnconst%20defaultName%20%3D%20'World'%3B%5Cn%5Cnexport%20function%20greet%28opts%29%20%7B%5Cn%20%20const%20%7B%5Cn%20%20%20%20greeting%20%3D%20defaultGreeting%2C%5Cn%20%20%20%20name%20%3D%20defaultName%5Cn%20%20%7D%20%3D%20opts%3B%5Cn%20%20console.log%28greeting%20%2B%20'%20'%20%2B%20name%29%3B%5Cn%7D%5Cn%5Cnexpor%5Cn%5Cn%2F%2Fexport%20const%20%7B%20a%20%7D%20%3D%20foo%3B%22%7D%5D%7D), ``` js export const { a } = foo; ``` yields `TypeError: Cannot set property 'isExported' of null`. I assume we should handle this?
Trying to do this,
yields
TypeError: Cannot set property 'isExported' of null. I assume we should handle this?