error: the inner value of this ManuallyDrop will not be dropped
  --> $DIR/undropped_manually_drops.rs:14:5
   |
LL |     drop(std::mem::ManuallyDrop::new(S));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: to drop a `ManuallyDrop<T>`, use std::mem::ManuallyDrop::drop
   = note: `-D clippy::undropped-manually-drops` implied by `-D warnings`

error: the inner value of this ManuallyDrop will not be dropped
  --> $DIR/undropped_manually_drops.rs:15:5
   |
LL |     drop(manual1);
   |     ^^^^^^^^^^^^^
   |
   = help: to drop a `ManuallyDrop<T>`, use std::mem::ManuallyDrop::drop

error: aborting due to 2 previous errors