warning: unnecessary map of the identity function
   --> src/hash/map.rs:438:55
    |
438 |               .get(hash_key(&*self.hasher, key), 0, key)
    |  _______________________________________________________^
439 | |             .map(|(k, v)| (k, v))
    | |_________________________________^ help: remove the call to `map`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
    --> src/ord/map.rs:1903:28
     |
1903 |         self.it.next_back().map(|(k, v)| (k, v))
     |                            ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
    --> src/ord/map.rs:1890:23
     |
1890 |         self.it.next().map(|(k, v)| (k, v))
     |                       ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
   --> src/ord/map.rs:711:40
    |
711 |               .lookup_next_mut(pool, key)
    |  ________________________________________^
712 | |             .map(|(ref k, ref mut v)| (k, v))
    | |_____________________________________________^ help: remove the call to `map`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
   --> src/ord/map.rs:680:40
    |
680 |               .lookup_prev_mut(pool, key)
    |  ________________________________________^
681 | |             .map(|(ref k, ref mut v)| (k, v))
    | |_____________________________________________^ help: remove the call to `map`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
   --> src/ord/map.rs:503:35
    |
503 |         self.root.lookup_next(key).map(|(k, v)| (k, v))
    |                                   ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
   --> src/ord/map.rs:478:35
    |
478 |         self.root.lookup_prev(key).map(|(k, v)| (k, v))
    |                                   ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity

warning: unnecessary map of the identity function
   --> src/ord/map.rs:453:30
    |
453 |         self.root.lookup(key).map(|(k, v)| (k, v))
    |                              ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_identity
    = note: `#[warn(clippy::map_identity)]` on by default

warning: manual implementation of `BuildHasher::hash_one`
  --> src/nodes/hamt.rs:25:5
   |
25 |     hasher.finish() as HashBits
   |     ^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_hash_one
   = note: `#[warn(clippy::manual_hash_one)]` on by default
help: try
   |
23 ~     
24 ~     
25 ~     bh.hash_one(&key) as HashBits
   |