Reporting of JavaScript syntax errors

[nene]

When parser detects invalid JavaScript, JSDuck throws an error like:

undefined method `range' for nil:NilClass

which is far from descriptive of the actual cause. Instead JSDuck should say "invalid JavaScript" and preferably point you to the place in file where the problem lies.

[madmed88]

Same problem here, I get undefined method `range' for nil:NilClass using jsduck 5 on windows. No idea where the error comes from.