When you change this to true, you may need to add more tests.
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objects. Thanks to CvX for reporting the bug and a test case.
* test/psych/test_object.rb: test for cyclic object references.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32194 b2dd03c8-39d4-4d8f-98ff-823fe69b080e