diff options
| -rw-r--r-- | py/objrange.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/py/objrange.c b/py/objrange.c index c78c53f11c..8c4e14f49c 100644 --- a/py/objrange.c +++ b/py/objrange.c @@ -154,6 +154,10 @@ STATIC mp_obj_t range_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) { o->start = self->start + slice.start * self->step; o->stop = self->start + slice.stop * self->step; o->step = slice.step * self->step; + if (slice.step < 0) { + // Negative slice steps have inclusive stop, so adjust for exclusive + o->stop -= self->step; + } return MP_OBJ_FROM_PTR(o); } #endif |