StackRduino
diff --git a/‎py/objstr.c‎
Lines changed: 0 additions & 3 deletions b/‎py/objstr.c‎
Lines changed: 0 additions & 3 deletions
diff --git a/‎py/sequence.c‎
Lines changed: 6 additions & 0 deletions b/‎py/sequence.c‎
Lines changed: 6 additions & 0 deletions
@@ -355,9 +355,6 @@ STATIC mp_obj_t str_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
             if (!mp_seq_get_fast_slice_indexes(self_len, index, &start, &stop)) {
                 assert(0);
             }
-            if (start >= stop) {
-                return MP_OBJ_NEW_QSTR(MP_QSTR_);
-            }
             return str_new(type, self_data + start, stop - start);
         }
 #endif
 
@@ -88,6 +88,12 @@ bool mp_seq_get_fast_slice_indexes(machine_uint_t len, mp_obj_t slice, machine_u
     } else if (stop > len) {
         stop = len;
     }
+
+    // CPython returns empty sequence in such case, or point for assignment is at start
+    if (start > stop) {
+        stop = start;
+    }
+
     *begin = start;
     *end = stop;
     return true;
Original file line number	Diff line number	Diff line change
`@@ -355,9 +355,6 @@ STATIC mp_obj_t str_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {`
`355`	`355`	`if (!mp_seq_get_fast_slice_indexes(self_len, index, &start, &stop)) {`
`356`	`356`	`assert(0);`
`357`	`357`	`}`
`358`		`- if (start >= stop) {`
`359`		`- return MP_OBJ_NEW_QSTR(MP_QSTR_);`
`360`		`- }`
`361`	`358`	`return str_new(type, self_data + start, stop - start);`
`362`	`359`	`}`
`363`	`360`	`#endif`