vlib/v/checker/tests/array_of_generic_struct_init_err.vv:6:6: warning: unused variable: `arr`
    4 | 
    5 | fn main() {
    6 |     mut arr := []Item{}
      |         ~~~
    7 | }
vlib/v/checker/tests/array_of_generic_struct_init_err.vv:6:15: error: generic struct `Item` must specify type parameter, e.g. Item[int]
    4 | 
    5 | fn main() {
    6 |     mut arr := []Item{}
      |                  ~~~~
    7 | }