Angularjs – ‘Error: [$parse:lexerr] Lexer Error: Unexpected next character’ on heroku deploy

I wrote an angular app using yeoman generator. It works great in development, but after I deploy to heroku and visit a specific page I get this error:

Error: [$parse:lexerr] Lexer Error: Unexpected next character  at columns 0-0 [\] in expression [\].
http://errors.angularjs.org/1.2.6/$parse/lexerr?p0=Unexpected%20nextharacter%20&p1=s%200-0%20%5B%5C%5D&p2=%5C
    at http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:3:30474
    at Zd.throwError (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:6:14396)
    at Zd.lex (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:6:13696)
    at $d.parse (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:6:16445)
    at http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:5:13197
    at e.parseAs (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:5:23401)
    at Object.e.(anonymous function) [as parseAsResourceUrl] (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:5:23604)
    at http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:6:28873
    at q (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:4:23046)
    at h (http://ang-news.herokuapp.com/scripts/244c37f5.vendor.js:4:19250) 

This description says the error occurs when an expression has a lexical error.

What's that and why is it only showing up in production?