Commented Unassigned: Count must be positive and count must refer to a location within the string/array/collection [1357]

I consistently receive this error when pasting text into the JS editor, I have attached a screenshot

> Count must be positive and count must refer to a locatino within the string/array/collection.
> Parameter name: count


Comments: Same issue here. Reported with the latest dev build from Sep 8, 2014.