vlib/v/checker/tests/unknown_comptime_expr.vv:7:6: error: `foo` is mut and may have changed since its definition
    5 | fn main() {
    6 |     mut foo := 0
    7 |     $if foo == 0 {
      |         ~~~
    8 |     }
    9 |
vlib/v/checker/tests/unknown_comptime_expr.vv:11:6: error: definition of `bar` is unknown at compile time
    9 | 
   10 |     bar := unknown_at_ct()
   11 |     $if bar == 0 {
      |         ~~~
   12 |     }
   13 | }
vlib/v/checker/tests/unknown_comptime_expr.vv:17:6: error: undefined ident: `huh`
   15 | fn if_is() {
   16 |     s := S1{}
   17 |     $if huh.typ is T {
      |         ~~~
   18 |     }
   19 |     $if s is int {
vlib/v/checker/tests/unknown_comptime_expr.vv:17:10: error: `huh` does not return a value
   15 | fn if_is() {
   16 |     s := S1{}
   17 |     $if huh.typ is T {
      |             ~~~
   18 |     }
   19 |     $if s is int {
vlib/v/checker/tests/unknown_comptime_expr.vv:17:17: error: unknown type `T`
   15 | fn if_is() {
   16 |     s := S1{}
   17 |     $if huh.typ is T {
      |                    ^
   18 |     }
   19 |     $if s is int {
vlib/v/checker/tests/unknown_comptime_expr.vv:21:13: error: invalid $if right expr: expected a type
   19 |     $if s is int {
   20 |     }
   21 |     $if s.i is 5 {
      |                ^
   22 |     }
   23 |     $if s.i is T {
vlib/v/checker/tests/unknown_comptime_expr.vv:23:13: error: unknown type `T`
   21 |     $if s.i is 5 {
   22 |     }
   23 |     $if s.i is T {
      |                ^
   24 |     }
   25 | }