vlib/v/checker/tests/void_function_assign_to_string.vv:1:6: notice: unused parameter: `x`
    1 | fn x(x int, y int) {
      |      ^
    2 | }
    3 |
vlib/v/checker/tests/void_function_assign_to_string.vv:1:13: notice: unused parameter: `y`
    1 | fn x(x int, y int) {
      |             ^
    2 | }
    3 |
vlib/v/checker/tests/void_function_assign_to_string.vv:6:4: error: assignment mismatch: 1 variable but `x()` returns 0 values
    4 | fn main() {
    5 |     mut a := ''
    6 |     a = x(1, 2) // hello
      |       ^
    7 |     eprintln('a: ${a}')
    8 | }