Checks for CommonJS module environments are not fail-safe

[hjerabek]

IMO, the CommonJS module environment checks coded here, i.e.

typeof module === 'object' && module.exports

will raise an exception if module==null. They should be changed to

typeof module === 'object' && module && module.exports

[SimonHeimberg]

You are right, it will raise an exception in this case. (I am wondering why the type of null is object, but this is how it is.) Is this case frequent?