error: this let-binding has unit value
  --> $DIR/let_unit.rs:14:5
   |
LL |     let _x = println!("x");
   |     ^^^^^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `println!("x");`
   |
   = note: `-D clippy::let-unit-value` implied by `-D warnings`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:18:9
   |
LL |         let _a = ();
   |         ^^^^^^^^^^^^ help: omit the `let` binding: `();`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:53:5
   |
LL | /     let _ = v
LL | |         .into_iter()
LL | |         .map(|i| i * 2)
LL | |         .filter(|i| i % 2 == 0)
LL | |         .map(|_| ())
LL | |         .next()
LL | |         .unwrap();
   | |__________________^
   |
help: omit the `let` binding
   |
LL ~     v
LL +         .into_iter()
LL +         .map(|i| i * 2)
LL +         .filter(|i| i % 2 == 0)
LL +         .map(|_| ())
LL +         .next()
 ...

error: this let-binding has unit value
  --> $DIR/let_unit.rs:80:5
   |
LL |     let x: () = f(); // Lint.
   |     ^^^^-^^^^^^^^^^^
   |         |
   |         help: use a wild (`_`) binding: `_`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:83:5
   |
LL |     let x: () = f2(0i32); // Lint.
   |     ^^^^-^^^^^^^^^^^^^^^^
   |         |
   |         help: use a wild (`_`) binding: `_`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:85:5
   |
LL |     let _: () = f3(()); // Lint
   |     ^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `f3(());`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:86:5
   |
LL |     let x: () = f3(()); // Lint
   |     ^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `f3(());`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:88:5
   |
LL |     let _: () = f4(vec![()]); // Lint
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `f4(vec![()]);`

error: this let-binding has unit value
  --> $DIR/let_unit.rs:89:5
   |
LL |     let x: () = f4(vec![()]); // Lint
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: omit the `let` binding: `f4(vec![()]);`

error: aborting due to 9 previous errors