error: field `c` is never read
  --> $DIR/union-fields-1.rs:9:5
   |
LL | union U1 {
   |       -- field in this union
...
LL |     c: u8,
   |     ^
   |
note: the lint level is defined here
  --> $DIR/union-fields-1.rs:4:9
   |
LL | #![deny(dead_code)]
   |         ^^^^^^^^^

error: field `a` is never read
  --> $DIR/union-fields-1.rs:12:5
   |
LL | union U2 {
   |       -- field in this union
LL |     a: u8,
   |     ^

error: field `a` is never read
  --> $DIR/union-fields-1.rs:16:20
   |
LL | union NoDropLike { a: u8 }
   |       ----------   ^
   |       |
   |       field in this union

error: field `c` is never read
  --> $DIR/union-fields-1.rs:21:5
   |
LL | union U {
   |       - field in this union
...
LL |     c: u8,
   |     ^

error: aborting due to 4 previous errors