[INFO] fetching crate etcommon-trie-test 0.3.12...
[INFO] checking etcommon-trie-test-0.3.12 against 5c543b0b8c73c7b72bc8284ced4fb22ead15734d for pr-160186
[INFO] extracting crate etcommon-trie-test 0.3.12 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate etcommon-trie-test 0.3.12
[INFO] finished tweaking crates.io crate etcommon-trie-test 0.3.12
[INFO] tweaked toml for crates.io crate etcommon-trie-test 0.3.12 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate etcommon-trie-test 0.3.12 on toolchain 5c543b0b8c73c7b72bc8284ced4fb22ead15734d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages to highest compatible versions
[INFO] [stderr]       Adding sha3 v0.6.0 (available: v0.12.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `etcommon-trie-test` (manifest) generated 1 warning
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded digest v0.6.1
[INFO] [stderr]   Downloaded block-buffer v0.2.0
[INFO] [stderr]   Downloaded generic-array v0.8.4
[INFO] [stderr]   Downloaded etcommon-rlp v0.2.5
[INFO] [stderr]   Downloaded etcommon-hexutil v0.2.4
[INFO] [stderr]   Downloaded elastic-array-plus v0.10.0
[INFO] [stderr]   Downloaded etcommon-bigint v0.2.10
[INFO] [stderr]   Downloaded sha3 v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7
[INFO] running `Command { std: "docker" "start" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7" "/opt/rustwide/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7" "/opt/rustwide/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `etcommon-trie-test` (manifest) generated 1 warning
[INFO] [stderr]    Compiling libc v0.2.191
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking typenum v1.20.1
[INFO] [stderr]     Checking elastic-array-plus v0.10.0
[INFO] [stderr]     Checking lazy_static v1.5.1
[INFO] [stderr]     Checking etcommon-hexutil v0.2.4
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking etcommon-rlp v0.2.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking generic-array v0.8.4
[INFO] [stderr]     Checking block-buffer v0.2.0
[INFO] [stderr]     Checking digest v0.6.1
[INFO] [stderr]     Checking sha3 v0.6.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking etcommon-bigint v0.2.10
[INFO] [stderr]     Checking etcommon-trie-test v0.3.12 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `DerefMut` and `Deref`
[INFO] [stdout]   --> src/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]    |                ^^^^^  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Decodable`, `Encodable`, and `Prototype`
[INFO] [stdout]  --> src/merkle/nibble.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rlp::{RlpStream, Encodable, Decodable, Rlp, Prototype};
[INFO] [stdout]   |                      ^^^^^^^^^  ^^^^^^^^^       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/merkle/nibble.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Formatter` and `self`
[INFO] [stdout]  --> src/merkle/nibble.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::fmt::{self, Debug, Formatter};
[INFO] [stdout]   |                ^^^^         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NibbleSlice` and `Nibble`
[INFO] [stdout]  --> src/merkle/node.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::nibble::{self, Nibble, NibbleVec, NibbleSlice, NibbleType};
[INFO] [stdout]   |                           ^^^^^^             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NibbleSlice`, `NibbleType`, `NibbleVec`, and `Nibble`
[INFO] [stdout]  --> src/merkle/mod.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use self::nibble::{Nibble, NibbleVec, NibbleSlice, NibbleType};
[INFO] [stdout]   |                    ^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::Trie`
[INFO] [stdout]  --> src/database/memory.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ::Trie;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DatabaseOwned`
[INFO] [stdout]  --> src/database/memory.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::{Database, DatabaseOwned, DatabaseGuard};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DerefMut` and `Deref`
[INFO] [stdout]   --> src/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]    |                ^^^^^  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Decodable`, `Encodable`, and `Prototype`
[INFO] [stdout]  --> src/merkle/nibble.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rlp::{RlpStream, Encodable, Decodable, Rlp, Prototype};
[INFO] [stdout]   |                      ^^^^^^^^^  ^^^^^^^^^       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/merkle/nibble.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Formatter` and `self`
[INFO] [stdout]  --> src/merkle/nibble.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::fmt::{self, Debug, Formatter};
[INFO] [stdout]   |                ^^^^         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NibbleSlice` and `Nibble`
[INFO] [stdout]  --> src/merkle/node.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::nibble::{self, Nibble, NibbleVec, NibbleSlice, NibbleType};
[INFO] [stdout]   |                           ^^^^^^             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Keccak256`
[INFO] [stdout]    --> src/merkle/node.rs:157:24
[INFO] [stdout]     |
[INFO] [stdout] 157 |     use sha3::{Digest, Keccak256};
[INFO] [stdout]     |                        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NibbleSlice`, `NibbleVec`, and `Nibble`
[INFO] [stdout]    --> src/merkle/node.rs:158:32
[INFO] [stdout]     |
[INFO] [stdout] 158 |     use merkle::nibble::{self, NibbleVec, NibbleSlice, Nibble};
[INFO] [stdout]     |                                ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NibbleSlice`, `NibbleType`, `NibbleVec`, and `Nibble`
[INFO] [stdout]  --> src/merkle/mod.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use self::nibble::{Nibble, NibbleVec, NibbleSlice, NibbleType};
[INFO] [stdout]   |                    ^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::Trie`
[INFO] [stdout]  --> src/database/memory.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ::Trie;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DatabaseOwned`
[INFO] [stdout]  --> src/database/memory.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::{Database, DatabaseOwned, DatabaseGuard};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::UnsafeCell`
[INFO] [stdout]    --> src/lib.rs:726:9
[INFO] [stdout]     |
[INFO] [stdout] 726 |     use std::cell::UnsafeCell;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]  --> src/merkle/nibble.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decodable`
[INFO] [stdout]  --> src/merkle/node.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rlp::{self, RlpStream, Encodable, Decodable, Rlp, Prototype};
[INFO] [stdout]   |                                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]  --> src/merkle/nibble.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Decodable`
[INFO] [stdout]  --> src/merkle/node.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rlp::{self, RlpStream, Encodable, Decodable, Rlp, Prototype};
[INFO] [stdout]   |                                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Digest`
[INFO] [stdout]    --> src/merkle/node.rs:157:16
[INFO] [stdout]     |
[INFO] [stdout] 157 |     use sha3::{Digest, Keccak256};
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DatabaseGuard`
[INFO] [stdout]    --> src/lib.rs:723:17
[INFO] [stdout]     |
[INFO] [stdout] 723 |     use super::{DatabaseGuard, Trie};
[INFO] [stdout]     |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:283:74
[INFO] [stdout]     |
[INFO] [stdout] 283 |             let submap = Self::build_submap(1, map.iter().filter(|&(key, value)| {
[INFO] [stdout]     |                                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/lib.rs:297:20
[INFO] [stdout]     |
[INFO] [stdout] 297 |             .map(|(key, value)| value.clone());
[INFO] [stdout]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:296:29
[INFO] [stdout]     |
[INFO] [stdout] 296 |             .filter(|&(key, value)| key.len() == 0).next()
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_nodes`
[INFO] [stdout]    --> src/lib.rs:632:44
[INFO] [stdout]     |
[INFO] [stdout] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
[INFO] [stdout]     |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_nodes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_additional`
[INFO] [stdout]    --> src/lib.rs:632:55
[INFO] [stdout]     |
[INFO] [stdout] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_additional`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]   --> src/database/mod.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<'a, D: DatabaseGuard> Change<'a, D> {
[INFO] [stdout]    | ---------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 96 |     pub fn free<'b>(&'b mut self, hash: H256) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `freed` is never read
[INFO] [stdout]    --> src/database/mod.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub struct ChangeSet {
[INFO] [stdout]     |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 123 |     freed: Vec<H256>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn iter(&self) -> FixedMerkleIterator<D, K, V> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn iter(&self) -> FixedMerkleIterator<'_, D, K, V> {
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:190:17
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn iter(&self) -> MerkleIterator<D> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn iter(&self) -> MerkleIterator<'_, D> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:251:67
[INFO] [stdout]     |
[INFO] [stdout] 251 |             submap.insert(key.split_at(common_len).1.into(), value.clone());
[INFO] [stdout]     |                                                                   ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:263:71
[INFO] [stdout]     |
[INFO] [stdout] 263 |             return MerkleNode::Leaf(key.clone(), map.get(key).unwrap().clone());
[INFO] [stdout]     |                                                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:297:38
[INFO] [stdout]     |
[INFO] [stdout] 297 |             .map(|(key, value)| value.clone());
[INFO] [stdout]     |                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:433:64
[INFO] [stdout]     |
[INFO] [stdout] 433 |                 node_map.insert(node_nibble.clone(), node_value.clone());
[INFO] [stdout]     |                                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/lib.rs:503:61
[INFO] [stdout]     |
[INFO] [stdout] 503 |                 node_map.insert(nibble::from_key(key), value.clone());
[INFO] [stdout]     |                                                             ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:651:74
[INFO] [stdout]     |
[INFO] [stdout] 651 |                     Some(MerkleNode::Leaf(node_nibble.clone(), node_value.clone()))
[INFO] [stdout]     |                                                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]   --> src/merkle/node.rs:60:55
[INFO] [stdout]    |
[INFO] [stdout] 60 |                 MerkleNode::Leaf(nibble.clone(), value.clone())
[INFO] [stdout]    |                                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:283:74
[INFO] [stdout]     |
[INFO] [stdout] 283 |             let submap = Self::build_submap(1, map.iter().filter(|&(key, value)| {
[INFO] [stdout]     |                                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/lib.rs:297:20
[INFO] [stdout]     |
[INFO] [stdout] 297 |             .map(|(key, value)| value.clone());
[INFO] [stdout]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:296:29
[INFO] [stdout]     |
[INFO] [stdout] 296 |             .filter(|&(key, value)| key.len() == 0).next()
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_nodes`
[INFO] [stdout]    --> src/lib.rs:632:44
[INFO] [stdout]     |
[INFO] [stdout] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
[INFO] [stdout]     |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_nodes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_additional`
[INFO] [stdout]    --> src/lib.rs:632:55
[INFO] [stdout]     |
[INFO] [stdout] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_additional`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:740:13
[INFO] [stdout]     |
[INFO] [stdout] 740 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:756:13
[INFO] [stdout]     |
[INFO] [stdout] 756 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:776:13
[INFO] [stdout]     |
[INFO] [stdout] 776 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:801:13
[INFO] [stdout]     |
[INFO] [stdout] 801 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:812:13
[INFO] [stdout]     |
[INFO] [stdout] 812 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:825:13
[INFO] [stdout]     |
[INFO] [stdout] 825 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:841:13
[INFO] [stdout]     |
[INFO] [stdout] 841 |         let mut map = HashMap::new();
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:843:13
[INFO] [stdout]     |
[INFO] [stdout] 843 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:854:13
[INFO] [stdout]     |
[INFO] [stdout] 854 |         let mut map = HashMap::new();
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:856:13
[INFO] [stdout]     |
[INFO] [stdout] 856 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:869:13
[INFO] [stdout]     |
[INFO] [stdout] 869 |         let mut map = HashMap::new();
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:871:13
[INFO] [stdout]     |
[INFO] [stdout] 871 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:872:13
[INFO] [stdout]     |
[INFO] [stdout] 872 |         let mut trie: Trie<HashMap<H256, Vec<u8>>> = Trie::build(database, &map);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]   --> src/database/mod.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<'a, D: DatabaseGuard> Change<'a, D> {
[INFO] [stdout]    | ---------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 96 |     pub fn free<'b>(&'b mut self, hash: H256) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `freed` is never read
[INFO] [stdout]    --> src/database/mod.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub struct ChangeSet {
[INFO] [stdout]     |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 123 |     freed: Vec<H256>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn iter(&self) -> FixedMerkleIterator<D, K, V> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn iter(&self) -> FixedMerkleIterator<'_, D, K, V> {
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:190:17
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn iter(&self) -> MerkleIterator<D> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn iter(&self) -> MerkleIterator<'_, D> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:251:67
[INFO] [stdout]     |
[INFO] [stdout] 251 |             submap.insert(key.split_at(common_len).1.into(), value.clone());
[INFO] [stdout]     |                                                                   ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:263:71
[INFO] [stdout]     |
[INFO] [stdout] 263 |             return MerkleNode::Leaf(key.clone(), map.get(key).unwrap().clone());
[INFO] [stdout]     |                                                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:297:38
[INFO] [stdout]     |
[INFO] [stdout] 297 |             .map(|(key, value)| value.clone());
[INFO] [stdout]     |                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:433:64
[INFO] [stdout]     |
[INFO] [stdout] 433 |                 node_map.insert(node_nibble.clone(), node_value.clone());
[INFO] [stdout]     |                                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/lib.rs:503:61
[INFO] [stdout]     |
[INFO] [stdout] 503 |                 node_map.insert(nibble::from_key(key), value.clone());
[INFO] [stdout]     |                                                             ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]    --> src/lib.rs:651:74
[INFO] [stdout]     |
[INFO] [stdout] 651 |                     Some(MerkleNode::Leaf(node_nibble.clone(), node_value.clone()))
[INFO] [stdout]     |                                                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[u8]` instead of cloning the inner type
[INFO] [stdout]   --> src/merkle/node.rs:60:55
[INFO] [stdout]    |
[INFO] [stdout] 60 |                 MerkleNode::Leaf(nibble.clone(), value.clone())
[INFO] [stdout]    |                                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.91s
[INFO] running `Command { std: "docker" "inspect" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7", kill_on_drop: false }`
[INFO] [stdout] 51102d23292810a0404d57c3ac77ead893e75ab3c460111aa01dc06fbc0c0ce7
