error[E0046]: not all trait items implemented, missing: `drop`
  --> $DIR/missing-drop-method.rs:2:1
   |
LL | impl Drop for DropNoMethod {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `drop` in implementation
   |
   = help: implement the missing item: `fn drop(&mut self) { todo!() }`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0046`.