vlib/v/checker/tests/expression_should_return_an_option.vv:26:10: error: expression should either return an Option or a Result
   24 |     return_option(true) or { println(err) }
   25 |     // should be an checker error:
   26 |     if x := return_string() {
      |             ~~~~~~~~~~~~~~~
   27 |         println('x: ${x}')
   28 |     }
