--- /dev/null
+error: used `expect()` on `an Option` value
+ --> $DIR/expect.rs:5:13
+ |
+LL | let _ = opt.expect("");
+ | ^^^^^^^^^^^^^^
+ |
+ = note: `-D clippy::expect-used` implied by `-D warnings`
+ = help: if this value is an `None`, it will panic
+
+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: aborting due to 2 previous errors
+