error: this function is only used once
  --> $DIR/single_call_fn.rs:26:1
   |
LL | fn a() {}
   | ^^^^^^^^^
   |
help: used here
  --> $DIR/single_call_fn.rs:29:5
   |
LL |     a();
   |     ^
   = note: `-D clippy::single-call-fn` implied by `-D warnings`

error: this function is only used once
  --> $DIR/single_call_fn.rs:16:1
   |
LL | / fn c() {
LL | |     println!("really");
LL | |     println!("long");
LL | |     println!("function...");
LL | | }
   | |_^
   |
help: used here
  --> $DIR/single_call_fn.rs:23:5
   |
LL |     c();
   |     ^

error: aborting due to 2 previous errors