safe_yaml vs Psych safe_load

[mfazekas]

On ruby 2.2.2

2.2.2 :001 > require 'yaml'
2.2.2 :002 > YAML.safe_load("foo: !ruby/regexp '/bar/'\n",[Regexp])
 => ("foo"=>/bar/)

if i include safe_yaml:

2.2.2 :001 > require 'yaml'
2.2.2 :002 > require 'safe_yaml'
2.2.2 :003 > YAML.safe_load("foo: !ruby/regexp '/bar/'\n",[Regexp])
 => {"foo"=>"/bar/"} 

Note that safe_yaml does not create a regex but a string.

[mfazekas]

The concrete issue i've faced was running rake rubocop on a project that included rails_admin, since rails_admin indirectly includes safe_yaml and rubocop uses YAML.safe_load, they are not working together. See rubocop/rubocop#2009