cpyext: _PyObject_GetDictPtr is unimplemented
Created originally on Bitbucket by wenzel (Wenzel Jakob)
The implementation _PyObject_GetDictPtr currently looks like a placeholder that always returns NULL.
@cpython_api([PyObject], PyObjectP, error=CANNOT_FAIL) def _PyObject_GetDictPtr(space, op): return lltype.nullptr(PyObjectP.TO)
This breaks one of the remaining testcases in pybind11 covering types with a modifiable dictionary.
It would be great if this could be modified to return the pointer at tp_dictoffset for types who have this field set up before PyType_Ready.