[3.7] bpo-37219: Remove erroneous optimization for differencing an empty set (GH-13965) (GH-13968)

1 files changed, 0 insertions, 8 deletions

diff --git a/Objects/setobject.c b/Objects/setobject.c
index 357e48ca3c..1e4781fe11 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -1478,10 +1478,6 @@ PyDoc_STRVAR(isdisjoint_doc,
 static int
 set_difference_update_internal(PySetObject *so, PyObject *other)
 {
-    if (PySet_GET_SIZE(so) == 0) {
-        return 0;
-    }
-
     if ((PyObject *)so == other)
         return set_clear_internal(so);
 
@@ -1556,10 +1552,6 @@ set_difference(PySetObject *so, PyObject *other)
     Py_ssize_t pos = 0, other_size;
     int rv;
 
-    if (PySet_GET_SIZE(so) == 0) {
-        return set_copy(so);
-    }
-
     if (PyAnySet_Check(other)) {
         other_size = PySet_GET_SIZE(other);
     }