Fix copy-and-paste errors

Author: markshannon

Python/bytecodes.c

@@ -2603,7 +2603,7 @@ dummy_func(
             if (func == NULL) {
                 _PyErr_Format(tstate, PyExc_TypeError,
                               "'%.100s' object is not an iterator",
-                              Py_TYPE(iter_o)->tp_name);
+                              Py_TYPE(iter)->tp_name);
                 ERROR_NO_POP();
             }
             next = func(iter);
@@ -2633,7 +2633,7 @@ dummy_func(
             if (func == NULL) {
                 _PyErr_Format(tstate, PyExc_TypeError,
                               "'%.100s' object is not an iterator",
-                              Py_TYPE(iter_o)->tp_name);
+                              Py_TYPE(iter)->tp_name);
                 ERROR_NO_POP();
             }
             next = func(iter);
@@ -2661,10 +2661,10 @@ dummy_func(
             if (func == NULL) {
                 _PyErr_Format(tstate, PyExc_TypeError,
                               "'%.100s' object is not an iterator",
-                              Py_TYPE(iter_o)->tp_name);
+                              Py_TYPE(iter)->tp_name);
                 ERROR_NO_POP();
             }
-            next = func(iter);
+            PyObject *next = func(iter);
             if (next != NULL) {
                 PUSH(next);
                 target = next_instr;