unnest with generate_subscripts and same array - Mailing list pgsql-general

Given that these are the only one array_col in play, is

    select unnest(array_col), generate_subscripts(array_col) from table_with_array_col ;

guaranteed to gave the subscripts match the array element?  In all the testing I've done it's worked, but I don't know if I was just lucky :)

Thanks,