[ruby-core:83054] [Ruby trunk Bug#13948] Segfault instead of recursion depth error

Issue #13948 has been reported by rpon (Ryan Pon).

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Bug #13948: Segfault instead of recursion depth error 
https://bugs.ruby-lang.org/issues/13948

* Author: rpon (Ryan Pon)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.4.2
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
Repro instructions:

~~~ ruby

# (using Ruby 2.4.2)
# 1. $ git clone [e-mail]:thoughtbot/factory_girl.git && cd factory_girl
# 2. $ bundle install
# 3. Add the code snippet under spec/acceptance/recursion.rb
# 4. $ rspec spec/acceptance/recursion.rb

require "spec_helper"

describe "seg fault" do
  before do
    define_model("User", two: :string, one: :string)

    FactoryGirl.define do
      factory :user do
        one { two }
        two { one }
      end
    end
  end

  subject { FactoryGirl.create(:user) }

  it('recursion depth error') { subject }
  it('segfault')              { subject } # need to do deep recursion twice
end

~~~

Results in:
~~~
[1]    1229 segmentation fault  bundle exec rspec
~~~



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