vlib/v/checker/tests/wrong_shift_left_option_err.vv:7:2: error: cannot push to Option array that was not unwrapped first
    5 | fn main() {
    6 |     mut a := ?[]SomeStruct([SomeStruct{}, SomeStruct{}]) // struct type
    7 |     a << []SomeStruct{len: 20}
      |     ^
    8 |     mut b := ?[]int([2, 8]) // primitive type
    9 |     b << [1, 3, 4]
vlib/v/checker/tests/wrong_shift_left_option_err.vv:7:2: error: `?[]SomeStruct` cannot be used as `[]SomeStruct`, unwrap the option first
    5 | fn main() {
    6 |     mut a := ?[]SomeStruct([SomeStruct{}, SomeStruct{}]) // struct type
    7 |     a << []SomeStruct{len: 20}
      |     ^
    8 |     mut b := ?[]int([2, 8]) // primitive type
    9 |     b << [1, 3, 4]
vlib/v/checker/tests/wrong_shift_left_option_err.vv:9:2: error: cannot push to Option array that was not unwrapped first
    7 |     a << []SomeStruct{len: 20}
    8 |     mut b := ?[]int([2, 8]) // primitive type
    9 |     b << [1, 3, 4]
      |     ^
   10 |     dump(a?.len)
   11 |     dump(b)
vlib/v/checker/tests/wrong_shift_left_option_err.vv:9:2: error: `?[]int` cannot be used as `[]int`, unwrap the option first
    7 |     a << []SomeStruct{len: 20}
    8 |     mut b := ?[]int([2, 8]) // primitive type
    9 |     b << [1, 3, 4]
      |     ^
   10 |     dump(a?.len)
   11 |     dump(b)