error: `fn` that only maps over argument
  --> tests/ui/single_option_map.rs:8:1
   |
LL | / fn h(arg: Option<u32>) -> Option<u32> {
LL | |
LL | |
LL | |     arg.map(|x| x * 2)
LL | | }
   | |_^
   |
   = help: move the `.map` to the caller or to an `_opt` function
   = note: `-D clippy::single-option-map` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::single_option_map)]`

error: `fn` that only maps over argument
  --> tests/ui/single_option_map.rs:14:1
   |
LL | / fn j(arg: Option<u64>) -> Option<u64> {
LL | |
LL | |
LL | |     arg.map(|x| x * 2)
LL | | }
   | |_^
   |
   = help: move the `.map` to the caller or to an `_opt` function

error: `fn` that only maps over argument
  --> tests/ui/single_option_map.rs:24:1
   |
LL | / fn mul_args_opt(a: Option<String>, b: u64) -> Option<String> {
LL | |
LL | |
LL | |     a.map(|val| mul_args(val, b + 1))
LL | | }
   | |_^
   |
   = help: move the `.map` to the caller or to an `_opt` function

error: aborting due to 3 previous errors