ActiveAdmin is causing a segmentation fault with sassc on Ruby 2.5.5

[ndbroadbent]

Hello,

I'm getting a consistent segmentation fault after I upgraded some gem dependencies, including sassc and activeadmin: sass/sassc-ruby#167

This is happening when I visit the admin pages in production (not during the assets precompile task, which is fine.)

I'm not 100% sure about what started causing this segmentation fault (it's very hard to narrow it down, because I can only reproduce this consistently on production or staging.) But I also upgraded activeadmin from 2.3.1 to 2.4.0. The crash is happening with both sassc 2.2.1 and 2.0.1.

I was hoping that I might be able to remove sassc for now and go back to Ruby Sass, because otherwise I'm completely unable to access my ActiveAdmin dashboard. But it looks like sassc is a fixed dependency.

Here are the logs for my crash: https://gist.github.com/ndbroadbent/3d0f78235dc9056ca9eb9464d53b4a9c

Related issues for sassc + activeadmin:

• Replaced sass with sassc #5690
• Ruby Sass ("sass" gem) will be end-of-life March 26th 2019 - Consider switching to "sassc-rails" or "sassc" #5502

A list of all the changes in my Gemfile.lock that seem like they might be related:

• activeadmin 2.3.1 => 2.4.0
  • Changelog (diff) - can't see anything obvious
• haml 5.1.1 => 5.1.2
  • Changelog (diff) - can't see anything obvious
• sass-rails 5.0.7 => 5.1.0
• sassc 2.0.1 => 2.2.1
• sassc-rails 2.1.1 => 2.1.2
  • I downgraded sass/sassc to the original versions and the crash is still happening
• simple_form 5.0.0 => 5.0.1
• tilt 2.0.9 => 2.0.10
• bourbon 5.1.0 => 6.0.0

[ndbroadbent]

Sorry, this wasn't related to ActiveAdmin! I just some had inline SCSS that I was rendering in my ActiveAdmin view, which was causing the sassc crash.