Bug: https://github.com/mikel/mail/issues/1384

Patch from https://github.com/ubicloud/ubicloud/pull/197

Forwarded: not-needed

--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,4 +1,7 @@
 require 'rails/all'
+require 'warning'
+
+Warning.ignore([:not_reached, :unused_var], /.*vendor_ruby\/mail\/parser.*/)
 
 module RSpecRails
   class Application < ::Rails::Application