“rake aborted! stack level too deep” while deploying to Heroku

Question

My website used to be working and Heroku precompiled the assets and everything. Now, seemingly out of nowhere, I started to get this message on deploy:

Preparing         


        

Answer 1

upgrading to sass v3.2.12 did the trick for me

but overall, it looks like the issue is fixed on all current versions, just do a bundle update and you should be good.