int keys_len = xbt_dynar_length(keys);
xbt_assert(xbt_dynar_length(keys) == xbt_dynar_length(lens));
- xbt_assert(xbt_dynar_length(keys) >= 1,
+ xbt_assert(!xbt_dynar_is_empty(keys),
"Can't get a zero-long key set in a multidict");
XBT_DEBUG("xbt_multidict_get(%p, %ld)", mdict, xbt_dynar_length(keys));