vlib/v/checker/tests/array_append_array_type_mismatch_err.vv:3:8: error: cannot append `[]int` to `[]u8`
    1 | fn main() {
    2 |     mut bc := []u8{}
    3 |     bc << [0xCA, 0xFE, 0xBA, 0xBE]
      |           ~~~~~~~~~~~~~~~~~~~~~~~~
    4 |     println(bc)
    5 | }