rust-clippy/tests/ui/expect.stderr

error: used `expect()` on `an Option` value
  --> $DIR/expect.rs:5:13
   |
LL |     let _ = opt.expect("");
   |             ^^^^^^^^^^^^^^
   |
   = help: if this value is `None`, it will panic
   = note: `-D clippy::expect-used` implied by `-D warnings`

error: used `expect()` on `a Result` value
  --> $DIR/expect.rs:10:13
   |
LL |     let _ = res.expect("");
   |             ^^^^^^^^^^^^^^
   |
   = help: if this value is an `Err`, it will panic

error: used `expect_err()` on `a Result` value
  --> $DIR/expect.rs:11:13
   |
LL |     let _ = res.expect_err("");
   |             ^^^^^^^^^^^^^^^^^^
   |
   = help: if this value is an `Ok`, it will panic

error: aborting due to 3 previous errors