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Sure, this is annoying, but the reality is that this type of stuff is very easily avoided through the use of linters. IMO, you should never work on a dynamic scripted language like JavaScript without constantly running a linter in the background to pick up stuff like this.

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Exactly my thoughts. Just ran the snippet through JSHINT and while it doesn't recognize the exact error it shows you the location where it happens.

http://jsfiddle.net/hnxjxyte/

Plus, with a text editor plugin like https://packagecontrol.io/packages/SublimeLinter-jshint it becomes a no-brainer.

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