Problem with rbx and method.to_proc

method

Oriols-Mac-Pro:spinach(851m|master!?) $ RBXOPT=-X19 irb
~> Console extensions: wirble hirb ap rails2 rails3 pm interactive_editor blueprints
rbx-head :001 > def foo
rbx-head :002?>   3
rbx-head :003?>   end
 => #<Rubinius::CompiledMethod foo file=(irb)> 
rbx-head :004 > m = method(:foo)
 => #<Method: Object#foo (defined in Object from "def foo")> 
rbx-head :005 > p = proc { 3 }
 => #<Proc:0x3184@(irb):5> 
rbx-head :006 > instance_exec(&m.to_proc)
NoMethodError: undefined method `static_scope' on nil:NilClass.
   from Kernel(NilClass)#static_scope (method_missing) at kernel/delta/kernel.rb:79
   from BasicObject(Object)#instance_exec at kernel/common/eval19.rb:91
   from { } in Object#irb_binding at (irb):6
   from Rubinius::BlockEnvironment#call_on_instance at kernel/common/block_environment.rb:72
rbx-head :007 > instance_exec(&p)
 => 3 
rbx-head :008 >