error: struct is never constructed: `Foo`
  --> $DIR/lint-dead-code-3.rs:13:1
   |
LL | struct Foo; //~ ERROR: struct is never constructed
   | ^^^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/lint-dead-code-3.rs:3:9
   |
LL | #![deny(dead_code)]
   |         ^^^^^^^^^

error: method is never used: `foo`
  --> $DIR/lint-dead-code-3.rs:15:5
   |
LL |     fn foo(&self) { //~ ERROR: method is never used
   |     ^^^^^^^^^^^^^

error: function is never used: `bar`
  --> $DIR/lint-dead-code-3.rs:20:1
   |
LL | fn bar() { //~ ERROR: function is never used
   | ^^^^^^^^

error: enum is never used: `c_void`
  --> $DIR/lint-dead-code-3.rs:59:1
   |
LL | enum c_void {} //~ ERROR: enum is never used
   | ^^^^^^^^^^^

error: foreign function is never used: `free`
  --> $DIR/lint-dead-code-3.rs:61:5
   |
LL |     fn free(p: *const c_void); //~ ERROR: foreign function is never used
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 5 previous errors