The patch causes a lot of warnings like

Objects/unicodeobject.c: In function ‘unicode_title_impl’:
Objects/unicodeobject.c:10581:5: warning: passing argument 1 of ‘_PyUnicode_Ready’ from incompatible pointer type [enabled by default]
     if (PyUnicode_READY(self) == -1)
     ^
Objects/unicodeobject.c:1484:1: note: expected ‘struct PyObject *’ but argument is of type ‘struct PyUnicodeObject *’
 _PyUnicode_Ready(PyObject *unicode)
 ^