error: used `unwrap()` on `an Option` value
  --> $DIR/unwrap_expect_used.rs:4:5
   |
LL |     Some(3).unwrap();
   |     ^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::unwrap-used` implied by `-D warnings`
   = help: if this value is `None`, it will panic

error: used `expect()` on `an Option` value
  --> $DIR/unwrap_expect_used.rs:5:5
   |
LL |     Some(3).expect("Hello world!");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::expect-used` implied by `-D warnings`
   = help: if this value is `None`, it will panic

error: used `unwrap()` on `a Result` value
  --> $DIR/unwrap_expect_used.rs:8:5
   |
LL |     a.unwrap();
   |     ^^^^^^^^^^
   |
   = help: if this value is an `Err`, it will panic

error: used `expect()` on `a Result` value
  --> $DIR/unwrap_expect_used.rs:9:5
   |
LL |     a.expect("Hello world!");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: if this value is an `Err`, it will panic

error: aborting due to 4 previous errors