```text
warning: replacing a value of type `T` with `T::default()` is better expressed using `std::mem::take`
  --> main/core/sim_stats.rs:95:31
   |
95 |                   alloc_counts: std::mem::replace(
   |  _______________________________^
96 | |                     &mut stats.alloc_counts.lock().unwrap(),
97 | |                     Counter::new(),
98 | |                 ),
   | |_________________^ help: consider using: `std::mem::take(&mut stats.alloc_counts.lock().unwrap())`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_with_default
   = note: `#[warn(clippy::mem_replace_with_default)]` on by default
```

```text
warning: large size difference between variants
   --> main/host/process.rs:815:1
    |
815 | / enum ProcessState {
816 | |     Runnable(RunnableProcess),
    | |     ------------------------- the largest variant contains at least 360 bytes
817 | |     Zombie(ZombieProcess),
    | |     --------------------- the second-largest variant contains at least 88 bytes
818 | | }
    | |_^ the entire enum is at least 360 bytes
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
    = note: `#[warn(clippy::large_enum_variant)]` on by default
help: consider boxing the large fields to reduce the total size of the enum
    |
816 -     Runnable(RunnableProcess),
816 +     Runnable(Box<RunnableProcess>),
```