diff -r 89821243621b Modules/posixmodule.c
--- a/Modules/posixmodule.c	Thu Jul 14 07:45:24 2016 +0300
+++ b/Modules/posixmodule.c	Thu Jul 14 17:25:12 2016 +0800
@@ -12319,6 +12319,8 @@
 
     path_repr = PyObject_CallFunctionObjArgs(func, NULL);
     Py_DECREF(func);
+    if (NULL == path_repr)
+        return NULL;
     if (!(PyUnicode_Check(path_repr) || PyBytes_Check(path_repr))) {
         PyErr_Format(PyExc_TypeError,
                      "expected %.200s.__fspath__() to return str or bytes, "