```coffee /// # Comment with three slashes: /// /// ``` ``` [stdin]:3:1: error: missing /// /// ^^^ ``` [Try CoffeeScript link](http://coffeescript.org/#try:%2F%2F%2F%0A%20%23%20Comment%20with%20three%20slashes%3A%20%2F%2F%2F%0A%2F%2F%2F) This is because the lexing of heregexes does not take comments into account.