error compiling assets with image-url tag

[gleydsonst]

I'm using the new cssbundling-rails gem. It's working perfect in dev, but in prod i'm getting this error when i'm trying to compile the assets:
following the doc: https://guides.rubyonrails.org/asset_pipeline.html#css-and-sass

footer {
  background-image: image-url("ruby.png");
}

just url("ruby.png") doesn't work, but it worked with the webpacker:

footer {
  background-image: url("ruby.png");
}

RAILS_ENV=production bundle exec rake assets:precompile

/home/app/myapp/shared/bundle/ruby/3.0.0/gems/sassc-2.4.0/lib/sassc/engine.rb:43: [BUG] Segmentation fault at 0x0000000000000000
ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0042 p:---- s:0308 e:000307 CFUNC  :compile_data_context
c:0041 p:0314 s:0303 e:000302 METHOD /home/app/myapp/shared/bundle/ruby/3.0.0/gems/sassc-2.4.0/lib/sassc/engine.rb:43
c:0040 p:0044 s:0291 e:000290 METHOD /home/app/myapp/shared/bundle/ruby/3.0.0/gems/sassc-rails-2.1.2/lib/sassc/rails/compressor.rb:29
c:0039 p:0007 s:0285 e:000284 METHOD /home/app/myapp/shared/bundle/ruby/3.0.0/gems/sprockets-4.0.2/lib/sprockets/sass_compressor.rb:30
c:0038 p:0047 s:0280 e:000279 METHOD /home/app/myapp/shared/bundle/ruby/3.0.0/gems/sprockets-4.0.2/lib/sprockets/processor_utils.rb:84
c:0037 p:0014 s:0272 e:000271 BLOCK  /home/app/myapp/shared/bundle/ruby/3.0.0/gems/sprockets-4.0.2/lib/sprockets/processor_utils.rb:66 [FINISH]
c:0036 p:---- s:0267 e:000266 CFUNC  :reverse_each

/home/app/.rbenv/versions/3.0.2/lib/ruby/3.0.0/set.rb:344:in `each'
/home/app/.rbenv/versions/3.0.2/lib/ruby/3.0.0/set.rb:344:in `each_key'

-- Machine register context ------------------------------------------------
 RIP: 0x00007f56666db03c RBP: 0x00007f56678fca30 RSP: 0x00007f56678fca30
 RAX: 0x0000000000000000 RBX: 0x00007f56581bde58 RCX: 0x0000000000000000
 RDX: 0x0000000000000000 RDI: 0x0000000000000000 RSI: 0x00007f56678fca10
  R8: 0x00005615af11de90  R9: 0x0000000000000006 R10: 0x00007f5666315446
 R11: 0x00007f56666db02c R12: 0x0000000000000000 R13: 0x0000000000000001
 R14: 0x00005615b0c4f8c8 R15: 0x00007f56678fdaac EFL: 0x0000000000010202

-- C level backtrace information -------------------------------------------
/home/app/.rbenv/versions/3.0.2/lib/libruby.so.3.0(rb_print_backtrace+0x11) [0x7f566bf23d83] vm_dump.c:758
/home/app/.rbenv/versions/3.0.2/lib/libruby.so.3.0(rb_vm_bugreport) vm_dump.c:998
/home/app/.rbenv/versions/3.0.2/lib/libruby.so.3.0(rb_bug_for_fatal_signal+0xf4) [0x7f566bd2ee04] error.c:786
/home/app/.rbenv/versions/3.0.2/lib/libruby.so.3.0(sigsegv+0x4d) [0x7f566be7ac5d] signal.c:960
/lib/x86_64-linux-gnu/libc.so.6(0x7f566baac210) [0x7f566baac210]

[phanhaiquang]

I have similar issue. RAILS_ENV=production bundle exec rake assets:precompile always crash, there is no problem with development environment. After isolate scss file one by one, I realized that it crashed due to "asset-url" inside scss file.

@font-face {
  font-family: 'Source Sans Pro';
  src: asset-url('source-sans-pro-v14-latin-regular.eot');        --> this line causes crash
  ...
  font-weight: normal;
  font-style: normal;
}

I tried many ways that found by google such as

1. Downgrade sprockets from "4.0" to "3.7.2"
2. Add "env.export_concurrent = false" to initializers/assets.rb
3. Play around with Rails.application.config.assets.precompile += ....
4. ...

None of them work. Finally, I could fix it by below hack. I manually handle get method to asset files (depending on file name, then I redirect to corresponding asset file)

1. Change from "asset-url()" to "url()"
2. Update config/routes.rb by adding below code

  if Rails.env.production?
    f_redirector = lambda { |params, _req|
      _path = params[:name] + _req.path.gsub(/.*\./, '.')
      ApplicationController.helpers.asset_path(_path)
    }
    constraint = ->(request) {
      request.path.ends_with?('.eot') ||
      request.path.ends_with?('.woff') ||
      request.path.ends_with?('.ttf') ||
      request.path.ends_with?('.svg') ||
      request.path.ends_with?('.png')
    }
    get '/assets/*name', to: redirect(f_redirector), constraints: constraint
  end

This is a dirty hack, but at least my production could work temporary work for now.