```rust
fn bubble_sort(mut list: Vec<i32>) -> Vec<i32> {
  let n = list.len();
  for i in 0..n {
    for j in 0..n-i-1 {
      if list[j] > list[j+1] {
        list.swap(j, j+1);
      }
    }
  }
  arr
}
```
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