[ruby-core:74111] [Ruby trunk Bug#12140] Serialization of OpenStruct objects with YAML fails

From: jorge.manrubia@...
Date: 2016-03-03 16:04:05 UTC
List: ruby-core #74111
Issue #12140 has been reported by Jorge Manrubia.

----------------------------------------
Bug #12140: Serialization of OpenStruct objects with YAML fails
https://bugs.ruby-lang.org/issues/12140

* Author: Jorge Manrubia
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
When deserializing a serialized YAML open-struct object, it fails with an exception `NoMethodError: undefined method `key?' for nil:NilClass`.

This breaks `serialized` attributes in Rails 3.2 with Ruby 2.3.

To reproduce:

~~~
require 'ostruct'
require 'yaml'
YAML.load(YAML.dump(OpenStruct.new))
~~~

Full exception trace:

~~~
NoMethodError: undefined method `key?' for nil:NilClass
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/ostruct.rb:176:in `respond_to_missing?'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:381:in `respond_to?'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:381:in `init_with'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:374:in `revive'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:208:in `visit_Psych_Nodes_Mapping'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:in `visit'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in `accept'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:in `accept'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:311:in `visit_Psych_Nodes_Document'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:in `visit'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in `accept'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:in `accept'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/nodes/node.rb:38:in `to_ruby'
	from /Users/jorge/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych.rb:253:in `load'
	from (irb):1
	from /Users/jorge/.rbenv/versions/2.3.0/bin/irb:11:in `<main>'
~~~



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