error: error tag 'error.NotInSet' is not in error set 'ParseErr'
  --> examples/1001-errors-set-typing.sx:13:20
   |
13 |     c : ParseErr = error.NotInSet;   // error: NotInSet not in ParseErr
   |                    ^^^^^^^^^^^^^^

error: an error-set value compares only with an `error.X` tag or another error-set value; coerce with `xx` to compare the raw id
  --> examples/1001-errors-set-typing.sx:14:8
   |
14 |     if c == 42 { return 1; }         // error: error-set value vs raw integer
   |        ^