error: use of `unwrap_or` followed by a function call
  --> $DIR/unwrap_or.rs:5:47
   |
LL |     let s = Some(String::from("test string")).unwrap_or("Fail".to_string()).len();
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_else(|| "Fail".to_string())`
   |
   = note: `-D clippy::or-fun-call` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::or_fun_call)]`

error: use of `unwrap_or` followed by a function call
  --> $DIR/unwrap_or.rs:11:47
   |
LL |     let s = Some(String::from("test string")).unwrap_or("Fail".to_string()).len();
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_else(|| "Fail".to_string())`

error: aborting due to 2 previous errors