Kernel.eval fails when called from Apricot code

[solson]

Here I attempt to run a simple Kernel.eval(1):

[..ricot/lib/apricot|master⚡]$ ../../bin/apricot -B -e '(. Kernel eval "1")'               [1]
0000:  push_cpath_top             
0001:  find_const                 0
0003:  push_literal               "1"
0005:  string_dup                 
0006:  send_stack                 :eval, 1
0009:  ret                        
An exception occurred running ../../bin/apricot
    can't dup NilClass (TypeError)

Backtrace:
       ImmediateValue(NilClass)#dup at kernel/common/immediate.rb:38
                        Kernel.eval at kernel/common/eval.rb:65
  Object#__script__ (__top_level__) at -e:1
           { } in Object#__script__ at ../../bin/apricot:54
                         Array#each at kernel/bootstrap/array.rb:68
                  Object#__script__ at ../../bin/apricot:50
   Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:67
   Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:109
            Rubinius::Loader#script at kernel/loader.rb:632
              Rubinius::Loader#main at kernel/loader.rb:835

Relevant code from kernel.rb (the second line is the failing dup):

     existing_scope = binding.constant_scope
     binding.constant_scope = existing_scope.dup

The binding.constant_scope seems to come from Rubinius::ConstantScope.of_sender (the sender in this case being an Apricot top-level block of code.)

So it appears that this situation occurs because Apricot code has no ConstantScope.