docs: def _init_ugly_crap():
      """This function implements a few ugly things so that we can patch the
      traceback objects.  The function returned allows resetting `tb_next` on
      any python traceback object.
      """
      import ctypes
      from types import TracebackType
  
      # figure out side of _Py_ssize_t
      if hasattr(ctypes.pythonapi, 'Py_InitModule4_64'):
          _Py_ssize_t = ctypes.c_int64
      else:
          _Py_ssize_t = ctypes.c_int
  
      # regular python
      class _PyObject(ctypes.Structure):
          pass
      _PyObject._fields_ = [
          ('ob_refcnt', _Py_ssize_t),
          ('ob_type', ctypes.POINTER(_PyObject))
      ]
  
      # python with trace
      if object.__basicsize__ != ctypes.sizeof(_PyObject):
          class _PyObject(ctypes.Structure):
              pass
          _PyObject._fields_ = [
              ('_ob_next', ctypes.POINTER(_PyObject)),
              ('_ob_prev', ctypes.POINTER(_PyObject)),
              ('ob_refcnt', _Py_ssize_t),
              ('ob_type', ctypes.POINTER(_PyObject))
          ]
  
      class _Traceback(_PyObject):
          pass
      _Traceback._fields_ = [
          ('tb_next', ctypes.POINTER(_Traceback)),
          ('tb_frame', ctypes.POINTER(_PyObject)),
          ('tb_lasti', ctypes.c_int),
          ('tb_lineno', ctypes.c_int)
      ]
  
      def tb_set_next(tb, next):
          """Set the tb_next attribute of a traceback object."""
          if not (isinstance(tb, TracebackType) and
                  (next is None or isinstance(next, TracebackType))):
              raise TypeError('tb_set_next arguments must be traceback objects')
          obj = _Traceback.from_address(id(tb))
          if tb.tb_next is not None:
              old = _Traceback.from_address(id(tb.tb_next))
              old.ob_refcnt -= 1
          if next is None:
              obj.tb_next = ctypes.POINTER(_Traceback)()
          else:
              next = _Traceback.from_address(id(next))
              next.ob_refcnt += 1
              obj.tb_next = ctypes.pointer(next)
  
      return tb_set_next