I hope this isn\'t a duplicate problem; I\'ve tried other solutions on SO with no effect
When pushing my app to Heroku, the push has failed because applicat
SOLUTION
The file that was breaking things was the font awesome CSS. Removing that from application.css's "require" lines allowed the precompilation to work.
The way to do this was to first delete all of the precompilation require fields, showing that it would compile, and then to slowly add the require fields back to see where it broke.
(Thanks for all those who helped figure this out.)