Gem::ConfigFile#load_file

# File tmp/rubies/ruby-4.0.0/lib/rubygems/config_file.rb, line 365
def load_file(filename)
  yaml_errors = [ArgumentError]

  return {} unless filename && !filename.empty? && File.exist?(filename)

  begin
    config = self.class.load_with_rubygems_config_hash(File.read(filename))
    if config.keys.any? {|k| k.to_s.gsub(%r{https?:\/\/}, "").include?(": ") }
      warn "Failed to load #{filename} because it doesn't contain valid YAML hash"
      return {}
    else
      return config
    end
  rescue *yaml_errors => e
    warn "Failed to load #{filename}, #{e}"
  rescue Errno::EACCES
    warn "Failed to load #{filename} due to permissions problem."
  end

  {}
end