error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
  --> $DIR/ok_expect.rs:14:5
   |
14 |     res.ok().expect("disaster!");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D ok-expect` implied by `-D warnings`

error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
  --> $DIR/ok_expect.rs:20:5
   |
20 |     res3.ok().expect("whoof");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^

error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
  --> $DIR/ok_expect.rs:22:5
   |
22 |     res4.ok().expect("argh");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^

error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
  --> $DIR/ok_expect.rs:24:5
   |
24 |     res5.ok().expect("oops");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^

error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
  --> $DIR/ok_expect.rs:26:5
   |
26 |     res6.ok().expect("meh");
   |     ^^^^^^^^^^^^^^^^^^^^^^^