Warning. Error encountered while saving cache … can't dump anonymous class

Question

When app is deployed with capistrano errors occur in production.log.

Compiled signup.css  (30ms)  (pid 31797)
Warning. Error encountered while saving cache /         


        

Answer 1

It is a known bug with the current release of Sass, updating the sass stylesheet will cause the caching error because of the Sprockets importer not serializing correctly. For the bug report see this.