vlib/v/checker/tests/unsafe_deference_nil_err.vv:1:1: warning: unused variable: `a`
    1 | a := unsafe { *nil }
      | ^
vlib/v/checker/tests/unsafe_deference_nil_err.vv:1:16: error: cannot deference a `nil` pointer
    1 | a := unsafe { *nil }
      |                ~~~