Dec 18 16:41:45.708 INFO checking etcommon-trie-test-0.3.12 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 16:41:45.709 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/etcommon-trie-test/0.3.12:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 16:41:46.143 INFO [stdout] 8fc96bd45c9ed0a23dc216e912fd122ca07086dab5b99d447086609057513393
Dec 18 16:41:46.150 INFO running `"docker" "start" "-a" "8fc96bd45c9ed0a23dc216e912fd122ca07086dab5b99d447086609057513393"`
Dec 18 16:41:47.368 INFO [stderr]     Checking etcommon-hexutil v0.2.4
Dec 18 16:41:47.796 INFO [stderr]     Checking etcommon-rlp v0.2.4
Dec 18 16:41:48.594 INFO [stderr]     Checking etcommon-bigint v0.2.10
Dec 18 16:41:50.593 INFO [stderr]     Checking etcommon-trie-test v0.3.12 (/opt/crater/workdir)
Dec 18 16:41:51.460 INFO [stderr] warning: unused imports: `DerefMut`, `Deref`
Dec 18 16:41:51.460 INFO [stderr]   --> src/lib.rs:12:16
Dec 18 16:41:51.460 INFO [stderr]    |
Dec 18 16:41:51.460 INFO [stderr] 12 | use std::ops::{Deref, DerefMut};
Dec 18 16:41:51.460 INFO [stderr]    |                ^^^^^  ^^^^^^^^
Dec 18 16:41:51.460 INFO [stderr]    |
Dec 18 16:41:51.460 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 16:41:51.460 INFO [stderr] 
Dec 18 16:41:51.460 INFO [stderr] warning: unused imports: `Decodable`, `Encodable`, `Prototype`
Dec 18 16:41:51.460 INFO [stderr]  --> src/merkle/nibble.rs:1:22
Dec 18 16:41:51.460 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 1 | use rlp::{RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 18 16:41:51.461 INFO [stderr]   |                      ^^^^^^^^^  ^^^^^^^^^       ^^^^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused import: `std::ops::Deref`
Dec 18 16:41:51.461 INFO [stderr]  --> src/merkle/nibble.rs:2:5
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 2 | use std::ops::Deref;
Dec 18 16:41:51.461 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused import: `Hash`
Dec 18 16:41:51.461 INFO [stderr]  --> src/merkle/nibble.rs:4:17
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 18 16:41:51.461 INFO [stderr]   |                 ^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused imports: `Debug`, `Formatter`, `self`
Dec 18 16:41:51.461 INFO [stderr]  --> src/merkle/nibble.rs:5:16
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 5 | use std::fmt::{self, Debug, Formatter};
Dec 18 16:41:51.461 INFO [stderr]   |                ^^^^  ^^^^^  ^^^^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused imports: `NibbleSlice`, `Nibble`
Dec 18 16:41:51.461 INFO [stderr]  --> src/merkle/node.rs:1:27
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 1 | use super::nibble::{self, Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 18 16:41:51.461 INFO [stderr]   |                           ^^^^^^             ^^^^^^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused imports: `NibbleSlice`, `NibbleType`, `NibbleVec`, `Nibble`
Dec 18 16:41:51.461 INFO [stderr]  --> src/merkle/mod.rs:4:20
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 4 | use self::nibble::{Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 18 16:41:51.461 INFO [stderr]   |                    ^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused import: `::Trie`
Dec 18 16:41:51.461 INFO [stderr]  --> src/database/memory.rs:1:5
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 1 | use ::Trie;
Dec 18 16:41:51.461 INFO [stderr]   |     ^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.461 INFO [stderr] warning: unused import: `DatabaseOwned`
Dec 18 16:41:51.461 INFO [stderr]  --> src/database/memory.rs:2:23
Dec 18 16:41:51.461 INFO [stderr]   |
Dec 18 16:41:51.461 INFO [stderr] 2 | use super::{Database, DatabaseOwned, DatabaseGuard};
Dec 18 16:41:51.461 INFO [stderr]   |                       ^^^^^^^^^^^^^
Dec 18 16:41:51.461 INFO [stderr] 
Dec 18 16:41:51.514 INFO [stderr] warning: unused imports: `DerefMut`, `Deref`
Dec 18 16:41:51.514 INFO [stderr]   --> src/lib.rs:12:16
Dec 18 16:41:51.514 INFO [stderr]    |
Dec 18 16:41:51.514 INFO [stderr] 12 | use std::ops::{Deref, DerefMut};
Dec 18 16:41:51.514 INFO [stderr]    |                ^^^^^  ^^^^^^^^
Dec 18 16:41:51.514 INFO [stderr]    |
Dec 18 16:41:51.514 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 16:41:51.514 INFO [stderr] 
Dec 18 16:41:51.514 INFO [stderr] warning: unused imports: `Decodable`, `Encodable`, `Prototype`
Dec 18 16:41:51.514 INFO [stderr]  --> src/merkle/nibble.rs:1:22
Dec 18 16:41:51.514 INFO [stderr]   |
Dec 18 16:41:51.514 INFO [stderr] 1 | use rlp::{RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 18 16:41:51.514 INFO [stderr]   |                      ^^^^^^^^^  ^^^^^^^^^       ^^^^^^^^^
Dec 18 16:41:51.514 INFO [stderr] 
Dec 18 16:41:51.514 INFO [stderr] warning: unused import: `std::ops::Deref`
Dec 18 16:41:51.514 INFO [stderr]  --> src/merkle/nibble.rs:2:5
Dec 18 16:41:51.514 INFO [stderr]   |
Dec 18 16:41:51.514 INFO [stderr] 2 | use std::ops::Deref;
Dec 18 16:41:51.514 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 18 16:41:51.514 INFO [stderr] 
Dec 18 16:41:51.514 INFO [stderr] warning: unused import: `Hash`
Dec 18 16:41:51.514 INFO [stderr]  --> src/merkle/nibble.rs:4:17
Dec 18 16:41:51.514 INFO [stderr]   |
Dec 18 16:41:51.514 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 18 16:41:51.514 INFO [stderr]   |                 ^^^^
Dec 18 16:41:51.514 INFO [stderr] 
Dec 18 16:41:51.520 INFO [stderr] warning: unused imports: `Debug`, `Formatter`, `self`
Dec 18 16:41:51.520 INFO [stderr]  --> src/merkle/nibble.rs:5:16
Dec 18 16:41:51.520 INFO [stderr]   |
Dec 18 16:41:51.520 INFO [stderr] 5 | use std::fmt::{self, Debug, Formatter};
Dec 18 16:41:51.520 INFO [stderr]   |                ^^^^  ^^^^^  ^^^^^^^^^
Dec 18 16:41:51.520 INFO [stderr] 
Dec 18 16:41:51.520 INFO [stderr] warning: unused imports: `NibbleSlice`, `Nibble`
Dec 18 16:41:51.520 INFO [stderr]  --> src/merkle/node.rs:1:27
Dec 18 16:41:51.520 INFO [stderr]   |
Dec 18 16:41:51.520 INFO [stderr] 1 | use super::nibble::{self, Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 18 16:41:51.520 INFO [stderr]   |                           ^^^^^^             ^^^^^^^^^^^
Dec 18 16:41:51.520 INFO [stderr] 
Dec 18 16:41:51.520 INFO [stderr] warning: unused import: `Keccak256`
Dec 18 16:41:51.520 INFO [stderr]    --> src/merkle/node.rs:157:24
Dec 18 16:41:51.520 INFO [stderr]     |
Dec 18 16:41:51.520 INFO [stderr] 157 |     use sha3::{Digest, Keccak256};
Dec 18 16:41:51.520 INFO [stderr]     |                        ^^^^^^^^^
Dec 18 16:41:51.520 INFO [stderr] 
Dec 18 16:41:51.520 INFO [stderr] warning: unused imports: `NibbleSlice`, `NibbleVec`, `Nibble`
Dec 18 16:41:51.520 INFO [stderr]    --> src/merkle/node.rs:158:32
Dec 18 16:41:51.520 INFO [stderr]     |
Dec 18 16:41:51.520 INFO [stderr] 158 |     use merkle::nibble::{self, NibbleVec, NibbleSlice, Nibble};
Dec 18 16:41:51.520 INFO [stderr]     |                                ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^
Dec 18 16:41:51.521 INFO [stderr] 
Dec 18 16:41:51.521 INFO [stderr] warning: unused imports: `NibbleSlice`, `NibbleType`, `NibbleVec`, `Nibble`
Dec 18 16:41:51.521 INFO [stderr]  --> src/merkle/mod.rs:4:20
Dec 18 16:41:51.521 INFO [stderr]   |
Dec 18 16:41:51.521 INFO [stderr] 4 | use self::nibble::{Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 18 16:41:51.521 INFO [stderr]   |                    ^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
Dec 18 16:41:51.521 INFO [stderr] 
Dec 18 16:41:51.521 INFO [stderr] warning: unused import: `::Trie`
Dec 18 16:41:51.521 INFO [stderr]  --> src/database/memory.rs:1:5
Dec 18 16:41:51.521 INFO [stderr]   |
Dec 18 16:41:51.521 INFO [stderr] 1 | use ::Trie;
Dec 18 16:41:51.521 INFO [stderr]   |     ^^^^^^
Dec 18 16:41:51.521 INFO [stderr] 
Dec 18 16:41:51.521 INFO [stderr] warning: unused import: `DatabaseOwned`
Dec 18 16:41:51.521 INFO [stderr]  --> src/database/memory.rs:2:23
Dec 18 16:41:51.521 INFO [stderr]   |
Dec 18 16:41:51.521 INFO [stderr] 2 | use super::{Database, DatabaseOwned, DatabaseGuard};
Dec 18 16:41:51.521 INFO [stderr]   |                       ^^^^^^^^^^^^^
Dec 18 16:41:51.521 INFO [stderr] 
Dec 18 16:41:51.521 INFO [stderr] warning: unused import: `std::cell::UnsafeCell`
Dec 18 16:41:51.521 INFO [stderr]    --> src/lib.rs:726:9
Dec 18 16:41:51.521 INFO [stderr]     |
Dec 18 16:41:51.521 INFO [stderr] 726 |     use std::cell::UnsafeCell;
Dec 18 16:41:51.521 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:41:51.521 INFO [stderr] 
Dec 18 16:41:51.765 INFO [stderr] warning: unused import: `Hasher`
Dec 18 16:41:51.765 INFO [stderr]  --> src/merkle/nibble.rs:4:23
Dec 18 16:41:51.765 INFO [stderr]   |
Dec 18 16:41:51.765 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 18 16:41:51.765 INFO [stderr]   |                       ^^^^^^
Dec 18 16:41:51.765 INFO [stderr] 
Dec 18 16:41:51.765 INFO [stderr] warning: unused import: `Decodable`
Dec 18 16:41:51.765 INFO [stderr]  --> src/merkle/node.rs:3:39
Dec 18 16:41:51.765 INFO [stderr]   |
Dec 18 16:41:51.765 INFO [stderr] 3 | use rlp::{self, RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 18 16:41:51.765 INFO [stderr]   |                                       ^^^^^^^^^
Dec 18 16:41:51.765 INFO [stderr] 
Dec 18 16:41:51.795 INFO [stderr] warning: unused variable: `value`
Dec 18 16:41:51.795 INFO [stderr]    --> src/lib.rs:283:74
Dec 18 16:41:51.795 INFO [stderr]     |
Dec 18 16:41:51.795 INFO [stderr] 283 |             let submap = Self::build_submap(1, map.iter().filter(|&(key, value)| {
Dec 18 16:41:51.795 INFO [stderr]     |                                                                          ^^^^^ help: consider using `_value` instead
Dec 18 16:41:51.795 INFO [stderr]     |
Dec 18 16:41:51.795 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 16:41:51.795 INFO [stderr] 
Dec 18 16:41:51.795 INFO [stderr] warning: unused variable: `value`
Dec 18 16:41:51.795 INFO [stderr]    --> src/lib.rs:296:29
Dec 18 16:41:51.795 INFO [stderr]     |
Dec 18 16:41:51.795 INFO [stderr] 296 |             .filter(|&(key, value)| key.len() == 0).next()
Dec 18 16:41:51.795 INFO [stderr]     |                             ^^^^^ help: consider using `_value` instead
Dec 18 16:41:51.795 INFO [stderr] 
Dec 18 16:41:51.796 INFO [stderr] warning: unused variable: `key`
Dec 18 16:41:51.796 INFO [stderr]    --> src/lib.rs:297:20
Dec 18 16:41:51.796 INFO [stderr]     |
Dec 18 16:41:51.796 INFO [stderr] 297 |             .map(|(key, value)| value.clone());
Dec 18 16:41:51.796 INFO [stderr]     |                    ^^^ help: consider using `_key` instead
Dec 18 16:41:51.796 INFO [stderr] 
Dec 18 16:41:51.796 INFO [stderr] warning: unused variable: `sub_nodes`
Dec 18 16:41:51.796 INFO [stderr]    --> src/lib.rs:632:44
Dec 18 16:41:51.796 INFO [stderr]     |
Dec 18 16:41:51.796 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 18 16:41:51.796 INFO [stderr]     |                                            ^^^^^^^^^ help: consider using `_sub_nodes` instead
Dec 18 16:41:51.796 INFO [stderr] 
Dec 18 16:41:51.796 INFO [stderr] warning: unused variable: `sub_additional`
Dec 18 16:41:51.796 INFO [stderr]    --> src/lib.rs:632:55
Dec 18 16:41:51.796 INFO [stderr]     |
Dec 18 16:41:51.796 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 18 16:41:51.796 INFO [stderr]     |                                                       ^^^^^^^^^^^^^^ help: consider using `_sub_additional` instead
Dec 18 16:41:51.796 INFO [stderr] 
Dec 18 16:41:51.830 INFO [stderr] warning: unused import: `Hasher`
Dec 18 16:41:51.831 INFO [stderr]  --> src/merkle/nibble.rs:4:23
Dec 18 16:41:51.831 INFO [stderr]   |
Dec 18 16:41:51.831 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 18 16:41:51.831 INFO [stderr]   |                       ^^^^^^
Dec 18 16:41:51.831 INFO [stderr] 
Dec 18 16:41:51.831 INFO [stderr] warning: unused import: `Decodable`
Dec 18 16:41:51.831 INFO [stderr]  --> src/merkle/node.rs:3:39
Dec 18 16:41:51.831 INFO [stderr]   |
Dec 18 16:41:51.831 INFO [stderr] 3 | use rlp::{self, RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 18 16:41:51.831 INFO [stderr]   |                                       ^^^^^^^^^
Dec 18 16:41:51.831 INFO [stderr] 
Dec 18 16:41:51.831 INFO [stderr] warning: unused import: `Digest`
Dec 18 16:41:51.831 INFO [stderr]    --> src/merkle/node.rs:157:16
Dec 18 16:41:51.831 INFO [stderr]     |
Dec 18 16:41:51.831 INFO [stderr] 157 |     use sha3::{Digest, Keccak256};
Dec 18 16:41:51.831 INFO [stderr]     |                ^^^^^^
Dec 18 16:41:51.831 INFO [stderr] 
Dec 18 16:41:51.832 INFO [stderr] warning: unused import: `DatabaseGuard`
Dec 18 16:41:51.832 INFO [stderr]    --> src/lib.rs:723:17
Dec 18 16:41:51.832 INFO [stderr]     |
Dec 18 16:41:51.832 INFO [stderr] 723 |     use super::{DatabaseGuard, Trie};
Dec 18 16:41:51.832 INFO [stderr]     |                 ^^^^^^^^^^^^^
Dec 18 16:41:51.832 INFO [stderr] 
Dec 18 16:41:51.864 INFO [stderr] warning: unused variable: `value`
Dec 18 16:41:51.865 INFO [stderr]    --> src/lib.rs:283:74
Dec 18 16:41:51.865 INFO [stderr]     |
Dec 18 16:41:51.865 INFO [stderr] 283 |             let submap = Self::build_submap(1, map.iter().filter(|&(key, value)| {
Dec 18 16:41:51.865 INFO [stderr]     |                                                                          ^^^^^ help: consider using `_value` instead
Dec 18 16:41:51.865 INFO [stderr]     |
Dec 18 16:41:51.865 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 16:41:51.865 INFO [stderr] 
Dec 18 16:41:51.865 INFO [stderr] warning: unused variable: `value`
Dec 18 16:41:51.865 INFO [stderr]    --> src/lib.rs:296:29
Dec 18 16:41:51.865 INFO [stderr]     |
Dec 18 16:41:51.865 INFO [stderr] 296 |             .filter(|&(key, value)| key.len() == 0).next()
Dec 18 16:41:51.865 INFO [stderr]     |                             ^^^^^ help: consider using `_value` instead
Dec 18 16:41:51.865 INFO [stderr] 
Dec 18 16:41:51.865 INFO [stderr] warning: unused variable: `key`
Dec 18 16:41:51.865 INFO [stderr]    --> src/lib.rs:297:20
Dec 18 16:41:51.865 INFO [stderr]     |
Dec 18 16:41:51.865 INFO [stderr] 297 |             .map(|(key, value)| value.clone());
Dec 18 16:41:51.865 INFO [stderr]     |                    ^^^ help: consider using `_key` instead
Dec 18 16:41:51.865 INFO [stderr] 
Dec 18 16:41:51.865 INFO [stderr] warning: unused variable: `sub_nodes`
Dec 18 16:41:51.865 INFO [stderr]    --> src/lib.rs:632:44
Dec 18 16:41:51.865 INFO [stderr]     |
Dec 18 16:41:51.865 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 18 16:41:51.865 INFO [stderr]     |                                            ^^^^^^^^^ help: consider using `_sub_nodes` instead
Dec 18 16:41:51.865 INFO [stderr] 
Dec 18 16:41:51.865 INFO [stderr] warning: unused variable: `sub_additional`
Dec 18 16:41:51.865 INFO [stderr]    --> src/lib.rs:632:55
Dec 18 16:41:51.865 INFO [stderr]     |
Dec 18 16:41:51.865 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 18 16:41:51.865 INFO [stderr]     |                                                       ^^^^^^^^^^^^^^ help: consider using `_sub_additional` instead
Dec 18 16:41:51.865 INFO [stderr] 
Dec 18 16:41:51.935 INFO [stderr] warning: method is never used: `free`
Dec 18 16:41:51.935 INFO [stderr]   --> src/database/mod.rs:96:5
Dec 18 16:41:51.935 INFO [stderr]    |
Dec 18 16:41:51.935 INFO [stderr] 96 |     pub fn free<'b>(&'b mut self, hash: H256) {
Dec 18 16:41:51.935 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:41:51.935 INFO [stderr]    |
Dec 18 16:41:51.935 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 16:41:51.935 INFO [stderr] 
Dec 18 16:41:51.935 INFO [stderr] warning: field is never used: `freed`
Dec 18 16:41:51.935 INFO [stderr]    --> src/database/mod.rs:123:5
Dec 18 16:41:51.935 INFO [stderr]     |
Dec 18 16:41:51.935 INFO [stderr] 123 |     freed: Vec<H256>,
Dec 18 16:41:51.935 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 18 16:41:51.935 INFO [stderr] 
Dec 18 16:41:51.942 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.942 INFO [stderr]    --> src/lib.rs:740:13
Dec 18 16:41:51.942 INFO [stderr]     |
Dec 18 16:41:51.942 INFO [stderr] 740 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.942 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.942 INFO [stderr]     |             |
Dec 18 16:41:51.942 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.942 INFO [stderr]     |
Dec 18 16:41:51.942 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 16:41:51.942 INFO [stderr] 
Dec 18 16:41:51.943 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.943 INFO [stderr]    --> src/lib.rs:756:13
Dec 18 16:41:51.943 INFO [stderr]     |
Dec 18 16:41:51.943 INFO [stderr] 756 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.943 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.943 INFO [stderr]     |             |
Dec 18 16:41:51.943 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.943 INFO [stderr] 
Dec 18 16:41:51.947 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.947 INFO [stderr]    --> src/lib.rs:776:13
Dec 18 16:41:51.947 INFO [stderr]     |
Dec 18 16:41:51.947 INFO [stderr] 776 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.947 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.947 INFO [stderr]     |             |
Dec 18 16:41:51.948 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.948 INFO [stderr] 
Dec 18 16:41:51.949 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.949 INFO [stderr]    --> src/lib.rs:801:13
Dec 18 16:41:51.949 INFO [stderr]     |
Dec 18 16:41:51.949 INFO [stderr] 801 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.949 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.949 INFO [stderr]     |             |
Dec 18 16:41:51.949 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.949 INFO [stderr] 
Dec 18 16:41:51.950 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.950 INFO [stderr]    --> src/lib.rs:812:13
Dec 18 16:41:51.950 INFO [stderr]     |
Dec 18 16:41:51.950 INFO [stderr] 812 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.950 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.950 INFO [stderr]     |             |
Dec 18 16:41:51.950 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.950 INFO [stderr] 
Dec 18 16:41:51.952 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.952 INFO [stderr]    --> src/lib.rs:825:13
Dec 18 16:41:51.952 INFO [stderr]     |
Dec 18 16:41:51.952 INFO [stderr] 825 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.952 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.952 INFO [stderr]     |             |
Dec 18 16:41:51.952 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.952 INFO [stderr] 
Dec 18 16:41:51.953 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.953 INFO [stderr]    --> src/lib.rs:841:13
Dec 18 16:41:51.953 INFO [stderr]     |
Dec 18 16:41:51.953 INFO [stderr] 841 |         let mut map = HashMap::new();
Dec 18 16:41:51.953 INFO [stderr]     |             ----^^^
Dec 18 16:41:51.953 INFO [stderr]     |             |
Dec 18 16:41:51.953 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.953 INFO [stderr] 
Dec 18 16:41:51.953 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.953 INFO [stderr]    --> src/lib.rs:843:13
Dec 18 16:41:51.953 INFO [stderr]     |
Dec 18 16:41:51.954 INFO [stderr] 843 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.954 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.954 INFO [stderr]     |             |
Dec 18 16:41:51.954 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.954 INFO [stderr] 
Dec 18 16:41:51.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.956 INFO [stderr]    --> src/lib.rs:854:13
Dec 18 16:41:51.956 INFO [stderr]     |
Dec 18 16:41:51.956 INFO [stderr] 854 |         let mut map = HashMap::new();
Dec 18 16:41:51.956 INFO [stderr]     |             ----^^^
Dec 18 16:41:51.956 INFO [stderr]     |             |
Dec 18 16:41:51.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.956 INFO [stderr] 
Dec 18 16:41:51.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.956 INFO [stderr]    --> src/lib.rs:856:13
Dec 18 16:41:51.956 INFO [stderr]     |
Dec 18 16:41:51.956 INFO [stderr] 856 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.956 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.956 INFO [stderr]     |             |
Dec 18 16:41:51.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.956 INFO [stderr] 
Dec 18 16:41:51.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.956 INFO [stderr]    --> src/lib.rs:869:13
Dec 18 16:41:51.956 INFO [stderr]     |
Dec 18 16:41:51.956 INFO [stderr] 869 |         let mut map = HashMap::new();
Dec 18 16:41:51.956 INFO [stderr]     |             ----^^^
Dec 18 16:41:51.956 INFO [stderr]     |             |
Dec 18 16:41:51.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.956 INFO [stderr] 
Dec 18 16:41:51.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.956 INFO [stderr]    --> src/lib.rs:871:13
Dec 18 16:41:51.956 INFO [stderr]     |
Dec 18 16:41:51.956 INFO [stderr] 871 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 18 16:41:51.956 INFO [stderr]     |             ----^^^^^^^^
Dec 18 16:41:51.956 INFO [stderr]     |             |
Dec 18 16:41:51.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.956 INFO [stderr] 
Dec 18 16:41:51.956 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:41:51.956 INFO [stderr]    --> src/lib.rs:872:13
Dec 18 16:41:51.956 INFO [stderr]     |
Dec 18 16:41:51.956 INFO [stderr] 872 |         let mut trie: Trie<HashMap<H256, Vec<u8>>> = Trie::build(database, &map);
Dec 18 16:41:51.956 INFO [stderr]     |             ----^^^^
Dec 18 16:41:51.956 INFO [stderr]     |             |
Dec 18 16:41:51.956 INFO [stderr]     |             help: remove this `mut`
Dec 18 16:41:51.956 INFO [stderr] 
Dec 18 16:41:52.003 INFO [stderr] warning: method is never used: `free`
Dec 18 16:41:52.003 INFO [stderr]   --> src/database/mod.rs:96:5
Dec 18 16:41:52.003 INFO [stderr]    |
Dec 18 16:41:52.003 INFO [stderr] 96 |     pub fn free<'b>(&'b mut self, hash: H256) {
Dec 18 16:41:52.003 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:41:52.003 INFO [stderr]    |
Dec 18 16:41:52.004 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 16:41:52.004 INFO [stderr] 
Dec 18 16:41:52.004 INFO [stderr] warning: field is never used: `freed`
Dec 18 16:41:52.004 INFO [stderr]    --> src/database/mod.rs:123:5
Dec 18 16:41:52.004 INFO [stderr]     |
Dec 18 16:41:52.004 INFO [stderr] 123 |     freed: Vec<H256>,
Dec 18 16:41:52.004 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 18 16:41:52.004 INFO [stderr] 
Dec 18 16:41:52.041 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.73s
Dec 18 16:41:52.308 INFO running `"docker" "inspect" "8fc96bd45c9ed0a23dc216e912fd122ca07086dab5b99d447086609057513393"`
Dec 18 16:41:52.415 INFO running `"docker" "rm" "-f" "8fc96bd45c9ed0a23dc216e912fd122ca07086dab5b99d447086609057513393"`
Dec 18 16:41:52.487 INFO [stdout] 8fc96bd45c9ed0a23dc216e912fd122ca07086dab5b99d447086609057513393