error: large future with a size of 1026 bytes
  --> $DIR/large_futures.rs:18:5
   |
LL |     should_warn().await;
   |     ^^^^^^^^^^^^^ help: consider `Box::pin` on it: `Box::pin(should_warn())`
   |
   = note: `-D clippy::large-futures` implied by `-D warnings`

error: aborting due to previous error