(gdb) p *call_frame
$3 = {
  previous = 0x7fff5fbed6f0, 
  static_scope_ = 0x4, 
  msg = 0x102e072f8, 
  cm = 0x10137f940, 
  flags = 0, 
  ip_ = 19, 
  top_scope_ = 0x8fe07c841ef36eaf, 
  scope = 0x7fff5fbed3b0, 
  stk = 0x7fff5fbed388
}
(gdb) p msg
$4 = (class rubinius::Dispatch &) @0x1003bca10: {
  name = 0x319e, 
  module = 0x10133b490, 
  method = 0x10137fa90, 
  method_missing = false
}