error[E0204]: the trait `Copy` may not be implemented for this type
  --> $DIR/E0204.rs:5:15
   |
LL |     foo: Vec<u32>,
   |     ------------- this field does not implement `Copy`
...
LL | impl Copy for Foo { }
   |               ^^^

error[E0204]: the trait `Copy` may not be implemented for this type
  --> $DIR/E0204.rs:7:10
   |
LL | #[derive(Copy)]
   |          ^^^^
LL | struct Foo2<'a> {
LL |     ty: &'a mut bool,
   |     ---------------- this field does not implement `Copy`
   |
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0204]: the trait `Copy` may not be implemented for this type
  --> $DIR/E0204.rs:17:15
   |
LL |     Bar { x: Vec<u32> },
   |           ----------- this field does not implement `Copy`
...
LL | impl Copy for EFoo { }
   |               ^^^^

error[E0204]: the trait `Copy` may not be implemented for this type
  --> $DIR/E0204.rs:19:10
   |
LL | #[derive(Copy)]
   |          ^^^^
LL | enum EFoo2<'a> {
LL |     Bar(&'a mut bool),
   |         ------------ this field does not implement `Copy`
   |
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0204`.