bpo-43475: Fix worst case collision behavior for NaN instances (GH-25493)
diff --git a/Include/pyhash.h b/Include/pyhash.h
index 4437b87..728ef93 100644
--- a/Include/pyhash.h
+++ b/Include/pyhash.h
@@ -7,7 +7,7 @@ extern "C" {
/* Helpers for hash functions */
#ifndef Py_LIMITED_API
-PyAPI_FUNC(Py_hash_t) _Py_HashDouble(double);
+PyAPI_FUNC(Py_hash_t) _Py_HashDouble(PyObject *, double);
PyAPI_FUNC(Py_hash_t) _Py_HashPointer(const void*);
// Similar to _Py_HashPointer(), but don't replace -1 with -2
PyAPI_FUNC(Py_hash_t) _Py_HashPointerRaw(const void*);
@@ -29,7 +29,6 @@ PyAPI_FUNC(Py_hash_t) _Py_HashBytes(const void*, Py_ssize_t);
#define _PyHASH_MODULUS (((size_t)1 << _PyHASH_BITS) - 1)
#define _PyHASH_INF 314159
-#define _PyHASH_NAN 0
#define _PyHASH_IMAG _PyHASH_MULTIPLIER