diff -r cc88969d55ba Objects/dictobject.c
--- a/Objects/dictobject.c	Wed Sep 21 09:16:31 2016 +0200
+++ b/Objects/dictobject.c	Wed Sep 21 09:20:05 2016 +0000
@@ -630,7 +630,7 @@
 static Py_ssize_t
 lookdict_index(PyDictKeysObject *k, Py_hash_t hash, Py_ssize_t index)
 {
-    size_t i, perturb;
+    size_t i;
     size_t mask = DK_MASK(k);
     Py_ssize_t ix;
 
@@ -643,7 +643,7 @@
         return DKIX_EMPTY;
     }
 
-    for (perturb = hash; ; perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT; ; perturb >>= PERTURB_SHIFT) {
         i = mask & ((i << 2) + i + perturb + 1);
         ix = dk_get_index(k, i);
         if (ix == index) {
@@ -685,7 +685,7 @@
 lookdict(PyDictObject *mp, PyObject *key,
          Py_hash_t hash, PyObject ***value_addr, Py_ssize_t *hashpos)
 {
-    size_t i, perturb, mask;
+    size_t i, mask;
     Py_ssize_t ix, freeslot;
     int cmp;
     PyDictKeysObject *dk;
@@ -739,7 +739,7 @@
         freeslot = -1;
     }
 
-    for (perturb = hash; ; perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT; ; perturb >>= PERTURB_SHIFT) {
         i = ((i << 2) + i + perturb + 1) & mask;
         ix = dk_get_index(dk, i);
         if (ix == DKIX_EMPTY) {
@@ -795,7 +795,7 @@
 lookdict_unicode(PyDictObject *mp, PyObject *key,
                  Py_hash_t hash, PyObject ***value_addr, Py_ssize_t *hashpos)
 {
-    size_t i, perturb;
+    size_t i;
     size_t mask = DK_MASK(mp->ma_keys);
     Py_ssize_t ix, freeslot;
     PyDictKeyEntry *ep, *ep0 = DK_ENTRIES(mp->ma_keys);
@@ -824,7 +824,8 @@
         ep = &ep0[ix];
         /* only split table can be ix != DKIX_DUMMY && me_key == NULL */
         assert(ep->me_key != NULL);
-        if (ep->me_key == key || (ep->me_hash == hash && unicode_eq(ep->me_key, key))) {
+        if (ep->me_key == key
+            || (ep->me_hash == hash && unicode_eq(ep->me_key, key))) {
             if (hashpos != NULL)
                 *hashpos = i;
             *value_addr = &ep->me_value;
@@ -833,7 +834,7 @@
         freeslot = -1;
     }
 
-    for (perturb = hash; ; perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT; ; perturb >>= PERTURB_SHIFT) {
         i = mask & ((i << 2) + i + perturb + 1);
         ix = dk_get_index(mp->ma_keys, i);
         if (ix == DKIX_EMPTY) {
@@ -871,7 +872,7 @@
                          Py_hash_t hash, PyObject ***value_addr,
                          Py_ssize_t *hashpos)
 {
-    size_t i, perturb;
+    size_t i;
     size_t mask = DK_MASK(mp->ma_keys);
     Py_ssize_t ix;
     PyDictKeyEntry *ep, *ep0 = DK_ENTRIES(mp->ma_keys);
@@ -904,7 +905,7 @@
         *value_addr = &ep->me_value;
         return ix;
     }
-    for (perturb = hash; ; perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT; ; perturb >>= PERTURB_SHIFT) {
         i = mask & ((i << 2) + i + perturb + 1);
         ix = dk_get_index(mp->ma_keys, i);
         assert (ix != DKIX_DUMMY);
@@ -937,7 +938,7 @@
 lookdict_split(PyDictObject *mp, PyObject *key,
                Py_hash_t hash, PyObject ***value_addr, Py_ssize_t *hashpos)
 {
-    size_t i, perturb;
+    size_t i;
     size_t mask = DK_MASK(mp->ma_keys);
     Py_ssize_t ix;
     PyDictKeyEntry *ep, *ep0 = DK_ENTRIES(mp->ma_keys);
@@ -970,7 +971,7 @@
         *value_addr = &mp->ma_values[ix];
         return ix;
     }
-    for (perturb = hash; ; perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT; ; perturb >>= PERTURB_SHIFT) {
         i = mask & ((i << 2) + i + perturb + 1);
         ix = dk_get_index(mp->ma_keys, i);
         if (ix == DKIX_EMPTY) {
@@ -1063,7 +1064,7 @@
 find_empty_slot(PyDictObject *mp, PyObject *key, Py_hash_t hash,
                 PyObject ***value_addr, Py_ssize_t *hashpos)
 {
-    size_t i, perturb;
+    size_t i;
     size_t mask = DK_MASK(mp->ma_keys);
     Py_ssize_t ix;
     PyDictKeyEntry *ep, *ep0 = DK_ENTRIES(mp->ma_keys);
@@ -1076,7 +1077,8 @@
         mp->ma_keys->dk_lookup = lookdict;
     i = hash & mask;
     ix = dk_get_index(mp->ma_keys, i);
-    for (perturb = hash; ix != DKIX_EMPTY; perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT; ix != DKIX_EMPTY;
+         perturb >>= PERTURB_SHIFT) {
         i = (i << 2) + i + perturb + 1;
         ix = dk_get_index(mp->ma_keys, i & mask);
     }
@@ -1201,7 +1203,7 @@
 insertdict_clean(PyDictObject *mp, PyObject *key, Py_hash_t hash,
                  PyObject *value)
 {
-    size_t i, perturb;
+    size_t i;
     PyDictKeysObject *k = mp->ma_keys;
     size_t mask = (size_t)DK_SIZE(k)-1;
     PyDictKeyEntry *ep0 = DK_ENTRIES(mp->ma_keys);
@@ -1212,8 +1214,8 @@
     assert(key != NULL);
     assert(PyUnicode_CheckExact(key) || k->dk_lookup == lookdict);
     i = hash & mask;
-    for (perturb = hash; dk_get_index(k, i) != DKIX_EMPTY;
-         perturb >>= PERTURB_SHIFT) {
+    for (size_t perturb = hash >> PERTURB_SHIFT;
+         dk_get_index(k, i) != DKIX_EMPTY; perturb >>= PERTURB_SHIFT) {
         i = mask & ((i << 2) + i + perturb + 1);
     }
     ep = &ep0[k->dk_nentries];