error: used `flat_map` where `filter_map` could be used instead
  --> $DIR/flat_map_option.rs:7:24
   |
LL |     let _ = [1].iter().flat_map(c);
   |                        ^^^^^^^^ help: try: `filter_map`
   |
   = note: `-D clippy::flat-map-option` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::flat_map_option)]`

error: used `flat_map` where `filter_map` could be used instead
  --> $DIR/flat_map_option.rs:8:24
   |
LL |     let _ = [1].iter().flat_map(Some);
   |                        ^^^^^^^^ help: try: `filter_map`

error: aborting due to 2 previous errors