commit a07da09ad5bd7d234ccd084a3a0933c290d1b592
author Raymond Hettinger <rhettinger@users.noreply.github.com> Thu Apr 22 08:34:57 2021 -0700
committer GitHub <noreply@github.com> Thu Apr 22 08:34:57 2021 -0700
tree 8c1ab67575527bd5c0c9452a74458ad5a29a1d08
parent accea7dc2bd30a6e8e1b0334acfca9585cbd7f8a

bpo-43475:  Fix worst case collision behavior for NaN instances (GH-25493)

Objects/complexobject.c

diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index a65ebdf..91e06a8 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -412,10 +412,10 @@ static Py_hash_t
 complex_hash(PyComplexObject *v)
 {
     Py_uhash_t hashreal, hashimag, combined;
-    hashreal = (Py_uhash_t)_Py_HashDouble(v->cval.real);
+    hashreal = (Py_uhash_t)_Py_HashDouble((PyObject *) v, v->cval.real);
     if (hashreal == (Py_uhash_t)-1)
         return -1;
-    hashimag = (Py_uhash_t)_Py_HashDouble(v->cval.imag);
+    hashimag = (Py_uhash_t)_Py_HashDouble((PyObject *)v, v->cval.imag);
     if (hashimag == (Py_uhash_t)-1)
         return -1;
     /* Note:  if the imaginary part is 0, hashimag is 0 now,

Objects/floatobject.c

diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index b3c41b1..7e78132 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -556,7 +556,7 @@ float_richcompare(PyObject *v, PyObject *w, int op)
 static Py_hash_t
 float_hash(PyFloatObject *v)
 {
-    return _Py_HashDouble(v->ob_fval);
+    return _Py_HashDouble((PyObject *)v, v->ob_fval);
 }
 
 static PyObject *