mozilla/butter — pull request #686 by mjschranz (2012-07-30 15:27:26+00:00)
Title: [#1867] Added onerror callback for JS loader

https://webmademovies.lighthouseapp.com/projects/65733-popcorn-maker/tickets/1867-add-an-onerror-callback-to-script-loader-in-dependencies#ticket-1867-2