error: parameter is only used in recursion
  --> tests/ui/only_used_in_recursion2.rs:3:35
   |
LL | fn _with_inner(flag: u32, a: u32, b: u32) -> usize {
   |                                   ^ help: if this is intentional, prefix it with an underscore: `_b`
   |
note: parameter used here
  --> tests/ui/only_used_in_recursion2.rs:11:52
   |
LL |     if flag == 0 { 0 } else { _with_inner(flag, a, b + x) }
   |                                                    ^
   = note: `-D clippy::only-used-in-recursion` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::only_used_in_recursion)]`

error: parameter is only used in recursion
  --> tests/ui/only_used_in_recursion2.rs:5:25
   |
LL |     fn inner(flag: u32, a: u32) -> u32 {
   |                         ^ help: if this is intentional, prefix it with an underscore: `_a`
   |
note: parameter used here
  --> tests/ui/only_used_in_recursion2.rs:7:47
   |
LL |         if flag == 0 { 0 } else { inner(flag, a) }
   |                                               ^

error: parameter is only used in recursion
  --> tests/ui/only_used_in_recursion2.rs:14:34
   |
LL | fn _with_closure(a: Option<u32>, b: u32, f: impl Fn(u32, u32) -> Option<u32>) -> u32 {
   |                                  ^ help: if this is intentional, prefix it with an underscore: `_b`
   |
note: parameter used here
  --> tests/ui/only_used_in_recursion2.rs:17:32
   |
LL |         _with_closure(Some(x), b, f)
   |                                ^

error: parameter is only used in recursion
  --> tests/ui/only_used_in_recursion2.rs:65:37
   |
LL | fn overwritten_param(flag: u32, mut a: usize) -> usize {
   |                                     ^ help: if this is intentional, prefix it with an underscore: `_a`
   |
note: parameter used here
  --> tests/ui/only_used_in_recursion2.rs:74:29
   |
LL |     overwritten_param(flag, a)
   |                             ^

error: parameter is only used in recursion
  --> tests/ui/only_used_in_recursion2.rs:77:32
   |
LL | fn field_direct(flag: u32, mut a: (usize,)) -> usize {
   |                                ^ help: if this is intentional, prefix it with an underscore: `_a`
   |
note: parameter used here
  --> tests/ui/only_used_in_recursion2.rs:83:32
   |
LL |         field_direct(flag - 1, a)
   |                                ^

error: aborting due to 5 previous errors