rubinius

The spec for StringIO#each_byte produces the following error:

$ bin/mspec spec/ruby/1.8/library/stringio/
rubinius 0.9.0 (ruby 1.8.6 compatible) (b55c3b1fa) (07/22/2008) [i686-pc-linux-gnu]
............................E...............................................................................................................................................................................................................................................................................................................................

1)
StringIO#each_byte does not yield if the current position is out of bounds ERROR
NoMethodError: No method 'each_byte' on an instance of NilClass.
    Kernel(NilClass)#each_byte (method_missing_cv) at kernel/core/kernel.rb:652
                          StringIO#each_byte at /home/jgre/software/rbx/lib/stringio.rb:118
                        Object#__script__ {} at ./spec/ruby/1.8/library/stringio/shared/each_byte.rb:21
                Kernel(Object)#instance_eval at kernel/core/eval.rb:103
                                   Proc#call at kernel/core/proc.rb:76
                   Enumerable(Array)#all? {} at kernel/core/enumerable.rb:462
                                  Array#each at kernel/core/array.rb:572
                      Enumerable(Array)#all? at kernel/core/enumerable.rb:462
                                  Array#each at kernel/core/array.rb:572
                           Object#__script__ at ./spec/ruby/1.8/library/stringio//each_byte_spec.rb:9
                    CompiledMethod#as_script at kernel/core/compiled_method.rb:407
                         Compile.single_load at kernel/core/compile.rb:248
                     Compile.unified_load {} at kernel/core/compile.rb:161
                                  Array#each at kernel/core/array.rb:572
                        Compile.unified_load at kernel/core/compile.rb:127
                                 Kernel.load at kernel/core/compile.rb:408
                Kernel(Object)#instance_eval at kernel/core/eval.rb:103
                                  Array#each at kernel/core/array.rb:572
                    CompiledMethod#as_script at kernel/core/compiled_method.rb:407
                         Compile.single_load at kernel/core/compile.rb:248
                 Compile.load_from_extension at kernel/core/compile.rb:326
                           Object#__script__ at kernel/loader.rb:221

Finished in 1.362595 seconds

55 files, 348 examples, 666 expectations, 0 failures, 1 error

The patch checks the position against the length of the contained string before delegating to String#each_byte.

After applying the patch, the spec runs without errors:

$ bin/mspec spec/ruby/1.8/library/stringio/
rubinius 0.9.0 (ruby 1.8.6 compatible) (b55c3b1fa) (07/22/2008) [i686-pc-linux-gnu]
............................................................................................................................................................................................................................................................................................................................................................

Finished in 1.361265 seconds

55 files, 348 examples, 667 expectations, 0 failures, 0 errors