message: remove memory leak from run-pass test
diff: @@ -3,7 +3,10 @@ fn option_box_deref() -> i32 {
  let val = Some(Box::new(42));
  unsafe {
  let ptr: *const i32 = std::mem::transmute::<Option<Box<i32>>, *const i32>(val);
  - *ptr
  + let ret = *ptr;
  + // unleak memory
  + std::mem::transmute::<*const i32, Option<Box<i32>>>(ptr);
  + ret
  }
  }
  