6)
Constant declaration returns the assigned variable ERROR
Missing or uninitialized constant: Y
     Module(Class)#const_missing at kernel/core/module.rb:687
      Module(Class)#remove_const at kernel/core/module.rb:820
            Module#__script__ {} at ./spec/frozen/1.8/language/constants_spec.rb:111
    Kernel(Module)#instance_exec at kernel/core/kernel.rb:542
    Kernel(Module)#instance_eval at kernel/core/eval.rb:130
                   MSpec.protect at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:124
             RunState#protect {} at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/state.rb:46
                      Array#each at kernel/core/array.rb:572
                RunState#protect at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/state.rb:46
             RunState#process {} at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/state.rb:64
                      Array#each at kernel/core/array.rb:572
                RunState#process at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/state.rb:68
                  MSpec.describe at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:29
                 Object#describe at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/object.rb:11
               Object#__script__ at ./spec/frozen/1.8/language/constants_spec.rb:77
        CompiledMethod#as_script at kernel/core/compiled_method.rb:359
             Compile.single_load at kernel/core/compile.rb:247
         Compile.unified_load {} at kernel/core/compile.rb:160
                      Array#each at kernel/core/array.rb:572
            Compile.unified_load at kernel/core/compile.rb:126
                     Kernel.load at kernel/core/compile.rb:404
                  MSpec.files {} at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:45
    Kernel(Module)#instance_exec at kernel/core/kernel.rb:542
    Kernel(Module)#instance_eval at kernel/core/eval.rb:130
                   MSpec.protect at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:120
                  MSpec.files {} at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:46
                      Array#each at kernel/core/array.rb:572
                     MSpec.files at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:42
                   MSpec.process at /Users/wilson/code/rubinius/mspec/lib/mspec/runner/mspec.rb:34
                     MSpecCI#run at mspec/bin/mspec-ci:68
                    MSpecCI.main at /Users/wilson/code/rubinius/mspec/lib/mspec/utils/script.rb:75
               Object#__script__ at mspec/bin/mspec-ci:75
        CompiledMethod#as_script at kernel/core/compiled_method.rb:359
             Compile.single_load at kernel/core/compile.rb:247
     Compile.load_from_extension at kernel/core/compile.rb:324
               Object#__script__ at kernel/loader.rb:204