diff options
| -rw-r--r-- | py/objstr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/py/objstr.c b/py/objstr.c index f082e95591..7478198e02 100644 --- a/py/objstr.c +++ b/py/objstr.c @@ -358,6 +358,13 @@ mp_obj_t mp_obj_str_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) { switch (op) { case MP_BINARY_OP_ADD: case MP_BINARY_OP_INPLACE_ADD: { + if (lhs_len == 0) { + return rhs_in; + } + if (rhs_len == 0) { + return lhs_in; + } + vstr_t vstr; vstr_init_len(&vstr, lhs_len + rhs_len); memcpy(vstr.buf, lhs_data, lhs_len); |