clippy 0.0.208

A bunch of helpful lints to avoid common pitfalls in Rust
error: usage of mem::forget on Drop type
  --> $DIR/mem_forget.rs:18:5
   |
18 |     memstuff::forget(six);
   |     ^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D mem-forget` implied by `-D warnings`

error: usage of mem::forget on Drop type
  --> $DIR/mem_forget.rs:21:5
   |
21 |     std::mem::forget(seven);
   |     ^^^^^^^^^^^^^^^^^^^^^^^

error: usage of mem::forget on Drop type
  --> $DIR/mem_forget.rs:24:5
   |
24 |     forgetSomething(eight);
   |     ^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors