vlib/v/checker/tests/array_init_sum_type_without_init_value_and_len_err.vv:4:9: error: cannot initalize sum type array without default value
    2 | 
    3 | fn main() {
    4 |     a := []Foo{len:10}
      |            ~~~
    5 |     println(a)
    6 |
