error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:15:13
   |
LL |     let _ = s_i32.len() * size_of::<i32>(); // WARNING
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::mem::size_of_val(s_i32)`
   |
   = note: `-D clippy::manual-slice-size-calculation` implied by `-D warnings`

error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:16:13
   |
LL |     let _ = size_of::<i32>() * s_i32.len(); // WARNING
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::mem::size_of_val(s_i32)`

error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:17:13
   |
LL |     let _ = size_of::<i32>() * s_i32.len() * 5; // WARNING
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::mem::size_of_val(s_i32)`

error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:21:13
   |
LL |     let _ = len * size_of::<i32>(); // WARNING
   |             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::mem::size_of_val(s_i32)`

error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:22:13
   |
LL |     let _ = s_i32.len() * size; // WARNING
   |             ^^^^^^^^^^^^^^^^^^ help: try: `std::mem::size_of_val(s_i32)`

error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:23:13
   |
LL |     let _ = len * size; // WARNING
   |             ^^^^^^^^^^ help: try: `std::mem::size_of_val(s_i32)`

error: manual slice size calculation
  --> $DIR/manual_slice_size_calculation.rs:25:13
   |
LL |     let _ = external!(&[1u64][..]).len() * size_of::<u64>();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::mem::size_of_val(external!(&[1u64][..]))`

error: aborting due to 7 previous errors