warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:8:5
   |
LL |     drop(&SomeStruct);
   |     ^^^^^-----------^
   |          |
   |          argument has type `&SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result
note: the lint level is defined here
  --> $DIR/dropping_references.rs:3:9
   |
LL | #![warn(dropping_references)]
   |         ^^^^^^^^^^^^^^^^^^^

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:11:5
   |
LL |     drop(&owned1);
   |     ^^^^^-------^
   |          |
   |          argument has type `&SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:12:5
   |
LL |     drop(&&owned1);
   |     ^^^^^--------^
   |          |
   |          argument has type `&&SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:13:5
   |
LL |     drop(&mut owned1);
   |     ^^^^^-----------^
   |          |
   |          argument has type `&mut SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:17:5
   |
LL |     drop(reference1);
   |     ^^^^^----------^
   |          |
   |          argument has type `&SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:20:5
   |
LL |     drop(reference2);
   |     ^^^^^----------^
   |          |
   |          argument has type `&mut SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:23:5
   |
LL |     drop(reference3);
   |     ^^^^^----------^
   |          |
   |          argument has type `&SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:28:5
   |
LL |     drop(&val);
   |     ^^^^^----^
   |          |
   |          argument has type `&T`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:36:5
   |
LL |     std::mem::drop(&SomeStruct);
   |     ^^^^^^^^^^^^^^^-----------^
   |                    |
   |                    argument has type `&SomeStruct`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:91:13
   |
LL |             drop(println_and(&13));
   |             ^^^^^----------------^
   |                  |
   |                  argument has type `&i32`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:94:14
   |
LL |         3 if drop(println_and(&14)) == () => (),
   |              ^^^^^----------------^
   |                   |
   |                   argument has type `&i32`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
  --> $DIR/dropping_references.rs:96:14
   |
LL |         4 => drop(&2),
   |              ^^^^^--^
   |                   |
   |                   argument has type `&i32`
   |
   = note: use `let _ = ...` to ignore the expression or result

warning: 12 warnings emitted