asset-url returning local filepath in development

I'm trying to add a font-face and I'm running into some unexpected behaviors :

@font-face
  font-family: 'myFont'
  src: asset-url('myFont.woff') format('woff')

and the generated CSS looks like this :

@font-face {
  font-family: "myFont";
  src: url(file:////Users/myself/../public/assets/myFont-84a15d02bbd5aa4b34978f91deba0b0e6657c5e6a3bc122d6f50788568b76e46.woff) format("woff");
}

I expected the url to be /assets/assets/myFont-84a15d02bbd5aa4b34978f91deba0b0e6657c5e6a3bc122d6f50788568b76e46.woff

Calling asset-path('myFont.woff') alone returns /assets/assets/myFont-84a15d02bbd5aa4b34978f91deba0b0e6657c5e6a3bc122d6f50788568b76e46.woff Calling url(asset-path('myFont.woff')) returns the local file path

A temporary workaround I'm using is to configure the asset_host :

config.action_controller.asset_host = "http://localhost:3000/"

so that it resolves to the correct url in the end, but I'd rather not.

Do you have any idea what's happening?

My gemfile :

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.2'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.3'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'mini_racer', platforms: :ruby

# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
gem 'pg'

gem "aws-sdk-s3", require: false
gem 'mini_magick'
gem 'wicked_pdf'
gem 'wkhtmltopdf-heroku'
gem 'wkhtmltopdf-binary'
gem "autoprefixer-rails"
gem 'prawn'
gem 'figaro'

# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', require: false

group :development, :test do
  gem 'pry'
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of chromedriver to run system tests with Chrome
  gem 'chromedriver-helper'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

rails / sass-rails

asset-url returning local filepath in development #426