diff -r e948154af406 Lib/test/test_int.py
--- a/Lib/test/test_int.py	Sat Apr 13 18:00:04 2013 +0300
+++ b/Lib/test/test_int.py	Sat Apr 13 17:15:58 2013 +0100
@@ -313,6 +313,12 @@
                     return 42
             self.assertEqual(int(JustTrunc()), 42)
 
+            class ExceptionalTrunc(base):
+                def __trunc__(self):
+                    1 / 0
+            with self.assertRaises(ZeroDivisionError):
+                int(ExceptionalTrunc())
+
             for trunc_result_base in (object, Classic):
                 class Integral(trunc_result_base):
                     def __int__(self):
diff -r e948154af406 Objects/abstract.c
--- a/Objects/abstract.c	Sat Apr 13 18:00:04 2013 +0300
+++ b/Objects/abstract.c	Sat Apr 13 17:15:58 2013 +0100
@@ -1293,6 +1293,8 @@
         PyObject *truncated = PyEval_CallObject(trunc_func, NULL);
         PyObject *int_instance;
         Py_DECREF(trunc_func);
+        if (truncated == NULL)
+            return NULL;
         /* __trunc__ is specified to return an Integral type,
            but int() needs to return a int. */
         int_instance = convert_integral_to_int(truncated,