warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
    --> src/tree/merkle_tree.rs:1567:34
     |
1567 | fn block_node(index: u64, value: &Vec<u8>) -> Node {
     |                                  ^^^^^^^^ help: change this to: `&[u8]`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
     = note: `#[warn(clippy::ptr_arg)]` on by default

warning: if let can be simplified with `.unwrap_or_default()`
   --> src/tree/merkle_tree.rs:482:39
    |
482 |                       additional_nodes: if let Some(additional_upgrade) = p.additional_upgrade {
    |  _______________________________________^
483 | |                         additional_upgrade
484 | |                     } else {
485 | |                         vec![]
486 | |                     },
    | |_____________________^ help: replace it with: `p.additional_upgrade.unwrap_or_default()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_unwrap_or_default
    = note: `#[warn(clippy::manual_unwrap_or_default)]` on by default

warning: useless conversion to the same type: `std::vec::Drain<'_, common::store::StoreInfo>`
   --> src/oplog/mod.rs:267:17
    |
267 |                 infos_to_flush.into_vec().drain(0..1).into_iter().collect();
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `infos_to_flush.into_vec().drain(0..1)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
    = note: `#[warn(clippy::useless_conversion)]` on by default

warning: assigning the result of `Clone::clone()` may be inefficient
   --> src/oplog/mod.rs:210:13
    |
210 |             header.tree.signature = signature.clone();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `header.tree.signature.clone_from(&signature)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones

warning: assigning the result of `Clone::clone()` may be inefficient
   --> src/oplog/mod.rs:209:13
    |
209 |             header.tree.root_hash = hash.clone();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `header.tree.root_hash.clone_from(hash)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones
    = note: `#[warn(clippy::assigning_clones)]` on by default