error: this function is only used once
  --> $DIR/single_call_fn.rs:33:1
   |
LL | / fn c() {
LL | |     println!("really");
LL | |     println!("long");
LL | |     println!("function...");
LL | | }
   | |_^
   |
help: used here
  --> $DIR/single_call_fn.rs:40:5
   |
LL |     c();
   |     ^
   = note: `-D clippy::single-call-fn` implied by `-D warnings`

error: this function is only used once
  --> $DIR/single_call_fn.rs:12:1
   |
LL | fn i() {}
   | ^^^^^^^^^
   |
help: used here
  --> $DIR/single_call_fn.rs:17:13
   |
LL |     let a = i;
   |             ^

error: this function is only used once
  --> $DIR/single_call_fn.rs:43:1
   |
LL | fn a() {}
   | ^^^^^^^^^
   |
help: used here
  --> $DIR/single_call_fn.rs:46:5
   |
LL |     a();
   |     ^

error: this function is only used once
  --> $DIR/single_call_fn.rs:13:1
   |
LL | fn j() {}
   | ^^^^^^^^^
   |
help: used here
  --> $DIR/single_call_fn.rs:24:9
   |
LL |         j();
   |         ^

error: aborting due to 4 previous errors