Rubinius incompatibility

[jnardone]

Ice_nine is trying to call methods on Rubinius structures like Hash::Trie.

This unfortunately breaks Ruby Grape, which depends on ice_nine (through virtus & axiom_types). There's a similar bug in the Rubinius tracker that points out this bug in ice_nine as well:
rubinius/rubinius#3694 which points out this problem from Rubinius's point of view. Seems to be some assumptions in ice_nine about native types that aren't guaranteed...

Using Rubinius 3.72:

irb(main):001:0> require 'ice_nine'
=> true
irb(main):002:0> h = { a: 1 }
=> {:a=>1}
irb(main):003:0> h2 = IceNine.deep_freeze(h)
NoMethodError: undefined method `default_proc' on an instance of Hash::Trie.
	from core/zed.rb:1413:in `default_proc (method_missing)'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer/hash.rb:22:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer.rb:100:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/support/recursion_guard.rb:36:in `guard'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer.rb:99:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer/object.rb:36:in `freeze_instance_variables'
	from core/array.rb:72:in `each'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer/object.rb:35:in `freeze_instance_variables'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer/object.rb:22:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer/hash.rb:21:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer.rb:100:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/support/recursion_guard.rb:36:in `guard'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer.rb:99:in `guarded_deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine/freezer.rb:41:in `deep_freeze'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/ice_nine-0.11.2/lib/ice_nine.rb:38:in `deep_freeze'
	from (irb):3
... 1 levels...
	from core/kernel.rb:1130:in `eval'
	from core/kernel.rb:585:in `loop'
	from core/proc.rb:20:in `call'
	from core/kernel.rb:1067:in `catch'
	from core/throw_catch.rb:8:in `register'
	from core/kernel.rb:1066:in `catch'
	from core/proc.rb:20:in `call'
	from core/kernel.rb:1067:in `catch'
	from core/throw_catch.rb:8:in `register'
	from core/kernel.rb:1066:in `catch'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/gems/rubysl-irb-2.1.1/bin/irb:12:in `__script__'
	from core/kernel.rb:572:in `load'
	from /Users/jnardone/.rbenv/versions/rbx-3.72/gems/bin/irb:22:in `__script__'
	from core/kernel.rb:572:in `load'
	from core/loader.rb:719:in `repl'
	from core/loader.rb:862:in `main'