diff -r 6e6aa2054824 Objects/tupleobject.c
--- a/Objects/tupleobject.c	Sat Aug 20 21:22:03 2016 +0300
+++ b/Objects/tupleobject.c	Sun Aug 21 17:26:07 2016 -0700
@@ -355,7 +355,13 @@
     x = 0x345678UL;
     p = v->ob_item;
     while (--len >= 0) {
-        y = PyObject_Hash(*p++);
+        PyObject *next = *p++;
+        if (next == NULL) {
+            PyErr_SetString(PyExc_TypeError,
+                            "Cannot compute a hash, tuple seems to be invalid");
+            return -1;
+        }
+        y = PyObject_Hash(next);
         if (y == -1)
             return -1;
         x = (x ^ y) * mult;