vlib/v/checker/tests/flag_enum_exhaustive_else_branch.vv:11:1: error: match must be exhaustive (add `else {}` at the end)
    9 | dump(perm)
   10 | 
   11 | match perm {
      | ~~~~~~~~~~~~
   12 |     .read { println('r') }
   13 |     .write { println('w') }