Issue #28430: Fix iterator of C implemented asyncio.Future doesn't

accept non-None value is passed to it.send(val).

Misc/NEWS

@@ -29,6 +29,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #28430: Fix iterator of C implemented asyncio.Future doesn't accept
+  non-None value is passed to it.send(val).
+
 - Issue #27025: Generated names for Tkinter widgets now start by the "!" prefix
   for readability (was "`").
 

Modules/_asynciomodule.c

@@ -815,13 +815,11 @@ FutureIter_iternext(futureiterobject *it)
 }
 
 static PyObject *
-FutureIter_send(futureiterobject *self, PyObject *arg)
+FutureIter_send(futureiterobject *self, PyObject *unused)
 {
-    if (arg != Py_None) {
-        PyErr_Format(PyExc_TypeError,
-                     "can't send non-None value to a FutureIter");
-        return NULL;
-    }
+    /* Future.__iter__ doesn't care about values that are pushed to the
+     * generator, it just returns "self.result().
+     */
     return FutureIter_iternext(self);
 }