Weird Bug in sugarcube 2.x Twine 2.x where a double slash comment causes bad evaluation

Background:

I was stuck for 2-3 days in my twine game project and decided to get help from forums. I was trying to create a workaround and simplfied version of my code to demonstrate the problem. And I have found this weird bug where a comment with two backslash causes following crush fault:

Apologies! An error has occurred. You may be able to continue, but some parts may not work properly

Error [StoryInit]: <<run>>: bad evaluation: $Distinct is not defined.

Code goes to StoryInit passage

<<run (function() {
	
// problem workaround

$Stat = function(id, start) {
	
	
	// default gain updater that's a normal stat expected to have
	this.getUpdate = function(amount) {
		
		return new $Updater(
			[ new $Modifier(this.id, new $Fn(this.modify, new $Args(amount), this)) ]
		);
	};
};

$Distinct = function(updaters) {
		

	var here = "is not important and this is simplfied code from my project"		
	// it's whether $Modifier or $Requirement that both has id property

	return "if you remove the comment above everything works fine?!"
};

})();>>

This is simplfied and cropped from my project. If you simply create an empty twine with story format sugarcube 2.x add a StoryInit and replace the code above, then try to run project. You should get the error that I got. Simply remove the comment that's in $Distinct object. Everything works fine.


http://www.mediafire.com/file/5msmwwa0rs17an1/bug_workaround.html

here is the workaround that you can load into twine. let me know what do you think.