error[E0119]: conflicting implementations of trait `Drop` for type `MyStruct`
  --> $DIR/issue-28568.rs:7:1
   |
LL | impl Drop for MyStruct {
   | ---------------------- first implementation here
...
LL | impl Drop for MyStruct {
   | ^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `MyStruct`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0119`.