euler:rubinius brian$ rm spec/core/bignum/*.rbc
euler:rubinius brian$ bin/mspec spec/core/bignum/
rubinius 0.10.0 (ruby 1.8.6 compatible) (6c295735c) (12/31/2009) [i686-apple-darwin9.5.0]
....

Finished in 0.432626 seconds

2 files, 4 examples, 14 expectations, 0 failures, 0 errors
euler:rubinius brian$ bin/mspec spec/core/bignum/
rubinius 0.10.0 (ruby 1.8.6 compatible) (6c295735c) (12/31/2009) [i686-apple-darwin9.5.0]
...F

1)
Bignum#coerce returns [Float, Float] if other is not a Bignum or Fixnum FAILED
Expected 9.22337203685478e+18 to be within +/- 3.0e-05 of 9.22337203685478e+18
         #<Object:0x5e>.__script__ {} at ./spec/core/bignum//coerce_spec.rb:13
         Kernel(Object)#instance_eval at kernel/common/eval.rb:110
            Enumerable(Array)#all? {} at kernel/common/enumerable.rb:462
                           Array#each at kernel/common/array.rb:572
               Enumerable(Array)#all? at kernel/common/enumerable.rb:462
                           Array#each at kernel/common/array.rb:574
                      main.__script__ at ./spec/core/bignum//coerce_spec.rb:3
    CompiledMethod#activate_as_script at kernel/common/compiled_method.rb:253
             CompiledMethod#as_script at kernel/common/compiled_method.rb:246
                  Compile.single_load at kernel/common/compile.rb:247
              Compile.unified_load {} at kernel/common/compile.rb:146
                           Array#each at kernel/common/array.rb:572
                 Compile.unified_load at kernel/common/compile.rb:110
                          Kernel.load at kernel/common/compile.rb:397
         Kernel(Object)#instance_eval at kernel/common/eval.rb:110
                           Array#each at kernel/common/array.rb:574
    CompiledMethod#activate_as_script at kernel/common/compiled_method.rb:253
             CompiledMethod#as_script at kernel/common/compiled_method.rb:246
                  Compile.single_load at kernel/common/compile.rb:241
          Compile.load_from_extension at kernel/common/compile.rb:319
                    Object#__script__ at kernel/loader.rb:210

Finished in 0.017897 seconds

2 files, 4 examples, 10 expectations, 1 failure, 0 errors