error[E0512]: transmute called with types of different sizes
  --> $DIR/transmute-from-fn-item-types-error.rs:14:13
   |
LL |     let i = mem::transmute(bar);
   |             ^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() {bar} (0 bits)
   = note: target type: i8 (8 bits)

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:18:13
   |
LL |     let p = mem::transmute(foo);
   |             ^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() -> (i8, *const (), std::option::Option<fn()>) {foo}
   = note: target type: *const ()
   = help: cast with `as` to a pointer instead

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:22:14
   |
LL |     let of = mem::transmute(main);
   |              ^^^^^^^^^^^^^^
   |
   = note: source type: fn() {main}
   = note: target type: std::option::Option<fn()>
   = help: cast with `as` to a pointer instead

error[E0512]: transmute called with types of different sizes
  --> $DIR/transmute-from-fn-item-types-error.rs:31:5
   |
LL |     mem::transmute::<_, u8>(main);
   |     ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: source type: fn() {main} (0 bits)
   = note: target type: u8 (8 bits)

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:35:5
   |
LL |     mem::transmute::<_, *mut ()>(foo);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() -> (i8, *const (), std::option::Option<fn()>) {foo}
   = note: target type: *mut ()
   = help: cast with `as` to a pointer instead

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:39:5
   |
LL |     mem::transmute::<_, fn()>(bar);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() {bar}
   = note: target type: fn()
   = help: cast with `as` to a pointer instead

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:48:5
   |
LL |     mem::transmute::<_, *mut ()>(Some(foo));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() -> (i8, *const (), std::option::Option<fn()>) {foo}
   = note: target type: *mut ()
   = help: cast with `as` to a pointer instead

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:52:5
   |
LL |     mem::transmute::<_, fn()>(Some(bar));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() {bar}
   = note: target type: fn()
   = help: cast with `as` to a pointer instead

error[E0591]: can't transmute zero-sized type
  --> $DIR/transmute-from-fn-item-types-error.rs:56:5
   |
LL |     mem::transmute::<_, Option<fn()>>(Some(baz));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: source type: unsafe fn() {baz}
   = note: target type: std::option::Option<fn()>
   = help: cast with `as` to a pointer instead

error: aborting due to 9 previous errors

Some errors occurred: E0512, E0591.
For more information about an error, try `rustc --explain E0512`.