For example, see the builtins patch on issue 20184 where I initially converted sorted() to AC, but then found that making it *work* as an AC function was actually quite difficult due to the PyList implementation expecting to be given a arg tuple and kwds dict.

Something like that seems appropriate here as well - break the magic formatting of the clinic input, add a reference to this bug and then tweak the signature line manually to not be a valid AC signature line.