error: union contains a field with possibly non-trivial drop code, drop code of union fields is ignored when dropping the union
  --> $DIR/union-with-drop-fields-lint.rs:10:5
   |
LL |     a: String,
   |     ^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/union-with-drop-fields-lint.rs:3:9
   |
LL | #![deny(unions_with_drop_fields)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^

error: union contains a field with possibly non-trivial drop code, drop code of union fields is ignored when dropping the union
  --> $DIR/union-with-drop-fields-lint.rs:18:5
   |
LL |     a: S,
   |     ^^^^

error: union contains a field with possibly non-trivial drop code, drop code of union fields is ignored when dropping the union
  --> $DIR/union-with-drop-fields-lint.rs:23:5
   |
LL |     a: T,
   |     ^^^^

error: aborting due to 3 previous errors