warning: this function has too many arguments (8/7)
   --> merk/src/tree/mod.rs:811:5
    |
811 | /     pub fn put_value_with_reference_value_hash_and_value_cost(
812 | |         mut self,
813 | |         value: Vec<u8>,
814 | |         value_hash: CryptoHash,
...   |
833 | |         >,
834 | |     ) -> CostResult<Self, Error> {
    | |________________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments

warning: this function has too many arguments (8/7)
   --> merk/src/tree/walk/mod.rs:344:5
    |
344 | /     pub fn put_value_with_reference_value_hash_and_value_cost(
345 | |         mut self,
346 | |         value: Vec<u8>,
347 | |         value_hash: CryptoHash,
...   |
366 | |         >,
367 | |     ) -> CostResult<Self, Error> {
    | |________________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments

warning: this function has too many arguments (9/7)
   --> merk/src/tree/ops.rs:628:5
    |
628 | /     fn recurse<K: AsRef<[u8]>, C, V, U, R>(
629 | |         self,
630 | |         batch: &MerkBatch<K>,
631 | |         mid: usize,
...   |
637 | |         section_removal_bytes: &mut R,
638 | |     ) -> CostResult<(Option<Self>, KeyUpdates), Error>
    | |______________________________________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments

warning: this function has too many arguments (8/7)
   --> merk/src/merk/apply.rs:277:5
    |
277 | /     pub fn apply_unchecked<KB, KA, C, V, U, R>(
278 | |         &mut self,
279 | |         batch: &MerkBatch<KB>,
280 | |         aux: &AuxMerkBatch<KA>,
...   |
285 | |         section_removal_bytes: &mut R,
286 | |     ) -> CostResult<(), Error>
    | |______________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments

warning: this function has too many arguments (8/7)
   --> merk/src/merk/apply.rs:176:5
    |
176 | /     pub fn apply_with_costs_just_in_time_value_update<KB, KA>(
177 | |         &mut self,
178 | |         batch: &MerkBatch<KB>,
179 | |         aux: &AuxMerkBatch<KA>,
...   |
198 | |         >,
199 | |     ) -> CostResult<(), Error>
    | |______________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
    = note: `#[warn(clippy::too_many_arguments)]` on by default

warning: unused `std::result::Result` that must be used
   --> storage/src/rocksdb_storage/storage.rs:430:13
    |
430 |             self.db.delete(iter.key().expect("should have key"));
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: `#[warn(unused_must_use)]` on by default
help: use `let _ = ...` to ignore the resulting value
    |
430 |             let _ = self.db.delete(iter.key().expect("should have key"));
    |             +++++++