warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:40:18
   |
LL |     Pointer::fmt(&zst_ref, f)
   |                  ^^^^^^^^
   |
note: the lint level is defined here
  --> $DIR/function-references.rs:3:9
   |
LL | #![warn(function_item_references)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:77:22
   |
LL |     println!("{:p}", &foo);
   |                      ^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:79:20
   |
LL |     print!("{:p}", &foo);
   |                    ^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:81:21
   |
LL |     format!("{:p}", &foo);
   |                     ^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:84:22
   |
LL |     println!("{:p}", &foo as *const _);
   |                      ^^^^^^^^^^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:86:22
   |
LL |     println!("{:p}", zst_ref);
   |                      ^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:88:22
   |
LL |     println!("{:p}", cast_zst_ptr);
   |                      ^^^^^^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:90:22
   |
LL |     println!("{:p}", coerced_zst_ptr);
   |                      ^^^^^^^^^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:93:22
   |
LL |     println!("{:p}", &fn_item);
   |                      ^^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:95:22
   |
LL |     println!("{:p}", indirect_ref);
   |                      ^^^^^^^^^^^^

warning: cast `nop` with `as fn()` to obtain a function pointer
  --> $DIR/function-references.rs:98:22
   |
LL |     println!("{:p}", &nop);
   |                      ^^^^

warning: cast `bar` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:100:22
   |
LL |     println!("{:p}", &bar);
   |                      ^^^^

warning: cast `baz` with `as fn(_, _) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:102:22
   |
LL |     println!("{:p}", &baz);
   |                      ^^^^

warning: cast `unsafe_fn` with `as unsafe fn()` to obtain a function pointer
  --> $DIR/function-references.rs:104:22
   |
LL |     println!("{:p}", &unsafe_fn);
   |                      ^^^^^^^^^^

warning: cast `c_fn` with `as extern "C" fn()` to obtain a function pointer
  --> $DIR/function-references.rs:106:22
   |
LL |     println!("{:p}", &c_fn);
   |                      ^^^^^

warning: cast `unsafe_c_fn` with `as unsafe extern "C" fn()` to obtain a function pointer
  --> $DIR/function-references.rs:108:22
   |
LL |     println!("{:p}", &unsafe_c_fn);
   |                      ^^^^^^^^^^^^

warning: cast `variadic` with `as unsafe extern "C" fn(_, ...)` to obtain a function pointer
  --> $DIR/function-references.rs:110:22
   |
LL |     println!("{:p}", &variadic);
   |                      ^^^^^^^^^

warning: cast `var` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:112:22
   |
LL |     println!("{:p}", &std::env::var::<String>);
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^

warning: cast `nop` with `as fn()` to obtain a function pointer
  --> $DIR/function-references.rs:115:32
   |
LL |     println!("{:p} {:p} {:p}", &nop, &foo, &bar);
   |                                ^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:115:38
   |
LL |     println!("{:p} {:p} {:p}", &nop, &foo, &bar);
   |                                      ^^^^

warning: cast `bar` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:115:44
   |
LL |     println!("{:p} {:p} {:p}", &nop, &foo, &bar);
   |                                            ^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:130:41
   |
LL |         std::mem::transmute::<_, usize>(&foo);
   |                                         ^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:132:50
   |
LL |         std::mem::transmute::<_, (usize, usize)>((&foo, &bar));
   |                                                  ^^^^^^^^^^^^

warning: cast `bar` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:132:50
   |
LL |         std::mem::transmute::<_, (usize, usize)>((&foo, &bar));
   |                                                  ^^^^^^^^^^^^

warning: cast `bar` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:142:15
   |
LL |     print_ptr(&bar);
   |               ^^^^

warning: cast `bar` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:144:24
   |
LL |     bound_by_ptr_trait(&bar);
   |                        ^^^^

warning: cast `bar` with `as fn(_) -> _` to obtain a function pointer
  --> $DIR/function-references.rs:146:30
   |
LL |     bound_by_ptr_trait_tuple((&foo, &bar));
   |                              ^^^^^^^^^^^^

warning: cast `foo` with `as fn() -> _` to obtain a function pointer
  --> $DIR/function-references.rs:146:30
   |
LL |     bound_by_ptr_trait_tuple((&foo, &bar));
   |                              ^^^^^^^^^^^^

warning: 28 warnings emitted