error: 's2' is a reserved type name and cannot be used as an identifier
  --> examples/1142-diagnostics-reserved-name-struct-const.sx:14:5
   |
14 |     s2 :: 5;
   |     ^^

error: 'u8' is a reserved type name and cannot be used as an identifier
  --> examples/1142-diagnostics-reserved-name-struct-const.sx:15:5
   |
15 |     u8 : s64 : 9;
   |     ^^