1 files changed, 1 insertions, 0 deletions
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index 4a7a957..d5cdfc5 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -1200,6 +1200,7 @@ cycle_setstate(cycleobject *lz, PyObject *state)
         PyErr_SetString(PyExc_TypeError, "state is not a tuple");
         return NULL;
     }
+    // The second item can be 1/0 in old pickles and True/False in new pickles
     if (!PyArg_ParseTuple(state, "O!i", &PyList_Type, &saved, &firstpass)) {
         return NULL;
     }