comment zero_delta due to weird bug

Author: SmartManoj

Lib/test/datetimetester.py

@@ -554,6 +554,11 @@ def test_constructor(self):
         ra(TypeError, lambda: td(milliseconds='1'))
         ra(TypeError, lambda: td(microseconds='1'))
 
+    def test_zero_delta(self):
+        td = timedelta
+        ns = td(nanoseconds=1)
+        assert ns/3 != ns, f"{ns/3 =} should not be equal to {ns =}"
+
     def test_computations(self):
         if self.is_fast_test(): return # BUG
         eq = self.assertEqual

Modules/_datetimemodule.c

@@ -1437,10 +1437,11 @@ new_delta_ex(int days, int seconds, int microseconds, int nanoseconds, int norma
     if (check_delta_day_range(days) < 0)
         return NULL;
 
+    // FIX: gives zero_delta.nanoseconds = 1; how?
     self = look_up_delta(days, seconds, microseconds, nanoseconds, type);
-    if (self != NULL) {
-        return (PyObject *)self;
-    }
+    // if (self != NULL) {
+    //     return (PyObject *)self;
+    // }
     assert(!PyErr_Occurred());
 
     self = (PyDateTime_Delta *) (type->tp_alloc(type, 0));