autopep8无法启动

Programming
1 
Debugger entered--Lisp error: (error "invalid rcs patch or internal error in py-autopep8-bf--apply-rcs-patch")
  signal(error ("invalid rcs patch or internal error in py-autopep8-bf--apply-rcs-patch"))
  error("invalid rcs patch or internal error in py-autopep8-bf--apply-rcs-patch")
  py-autopep8-bf--apply-rcs-patch(#<buffer *autopep8 patch*>)
  py-autopep8-bf--apply-executable-to-buffer("autopep8" py-autopep8--call-executable nil "py")
  py-autopep8-buffer()
  run-hooks(before-save-hook)
  basic-save-buffer(t)
  save-buffer(1)
  funcall-interactively(save-buffer 1)
  call-interactively(save-buffer nil nil)
  command-execute(save-buffer)