vlib/v/checker/tests/sum_type_assign_non_variant_err.vv:11:6: error: cannot assign to `w`: expected `Stmt`, not `IfExpr`
    9 | fn main() {
   10 |     mut w := Stmt(AnotherThing{})
   11 |     w = IfExpr{}
      |         ~~~~~~~~
   12 |     _ = w
   13 | }
