Dec 15 15:34:31.030 INFO testing ethereum-trie-test-0.3.9 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 15:34:31.030 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 15:34:31.406 INFO [stdout] f8d28cc0b5b87baac1c8e5b4f79452b0615b9b920a4ca90b5693c1cae26997ec
Dec 15 15:34:31.409 INFO running `"docker" "start" "-a" "f8d28cc0b5b87baac1c8e5b4f79452b0615b9b920a4ca90b5693c1cae26997ec"`
Dec 15 15:34:32.025 INFO [stderr] usermod: no changes
Dec 15 15:34:32.082 INFO [stderr]    Compiling ethereum-rlp v0.2.3
Dec 15 15:34:33.759 INFO [stderr]    Compiling ethereum-bigint v0.2.9
Dec 15 15:34:37.363 INFO [stderr]    Compiling ethereum-trie-test v0.3.9 (/source)
Dec 15 15:34:38.925 INFO [stderr] warning: unused imports: `DerefMut`, `Deref`
Dec 15 15:34:38.926 INFO [stderr]   --> src/lib.rs:12:16
Dec 15 15:34:38.926 INFO [stderr]    |
Dec 15 15:34:38.926 INFO [stderr] 12 | use std::ops::{Deref, DerefMut};
Dec 15 15:34:38.926 INFO [stderr]    |                ^^^^^  ^^^^^^^^
Dec 15 15:34:38.926 INFO [stderr]    |
Dec 15 15:34:38.926 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 15 15:34:38.926 INFO [stderr] 
Dec 15 15:34:38.926 INFO [stderr] warning: unused imports: `Decodable`, `Encodable`, `Prototype`
Dec 15 15:34:38.926 INFO [stderr]  --> src/merkle/nibble.rs:1:22
Dec 15 15:34:38.926 INFO [stderr]   |
Dec 15 15:34:38.926 INFO [stderr] 1 | use rlp::{RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 15 15:34:38.926 INFO [stderr]   |                      ^^^^^^^^^  ^^^^^^^^^       ^^^^^^^^^
Dec 15 15:34:38.926 INFO [stderr] 
Dec 15 15:34:38.926 INFO [stderr] warning: unused import: `std::ops::Deref`
Dec 15 15:34:38.926 INFO [stderr]  --> src/merkle/nibble.rs:2:5
Dec 15 15:34:38.926 INFO [stderr]   |
Dec 15 15:34:38.926 INFO [stderr] 2 | use std::ops::Deref;
Dec 15 15:34:38.926 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 15 15:34:38.926 INFO [stderr] 
Dec 15 15:34:38.926 INFO [stderr] warning: unused import: `Hash`
Dec 15 15:34:38.926 INFO [stderr]  --> src/merkle/nibble.rs:4:17
Dec 15 15:34:38.926 INFO [stderr]   |
Dec 15 15:34:38.926 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 15 15:34:38.926 INFO [stderr]   |                 ^^^^
Dec 15 15:34:38.926 INFO [stderr] 
Dec 15 15:34:38.926 INFO [stderr] warning: unused imports: `Debug`, `Formatter`, `self`
Dec 15 15:34:38.926 INFO [stderr]  --> src/merkle/nibble.rs:5:16
Dec 15 15:34:38.926 INFO [stderr]   |
Dec 15 15:34:38.926 INFO [stderr] 5 | use std::fmt::{self, Debug, Formatter};
Dec 15 15:34:38.926 INFO [stderr]   |                ^^^^  ^^^^^  ^^^^^^^^^
Dec 15 15:34:38.926 INFO [stderr] 
Dec 15 15:34:38.926 INFO [stderr] warning: unused imports: `NibbleSlice`, `Nibble`
Dec 15 15:34:38.926 INFO [stderr]  --> src/merkle/node.rs:1:27
Dec 15 15:34:38.926 INFO [stderr]   |
Dec 15 15:34:38.926 INFO [stderr] 1 | use super::nibble::{self, Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 15 15:34:38.926 INFO [stderr]   |                           ^^^^^^             ^^^^^^^^^^^
Dec 15 15:34:38.926 INFO [stderr] 
Dec 15 15:34:38.926 INFO [stderr] warning: unused imports: `NibbleSlice`, `NibbleType`, `NibbleVec`, `Nibble`
Dec 15 15:34:38.926 INFO [stderr]  --> src/merkle/mod.rs:4:20
Dec 15 15:34:38.927 INFO [stderr]   |
Dec 15 15:34:38.927 INFO [stderr] 4 | use self::nibble::{Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 15 15:34:38.927 INFO [stderr]   |                    ^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
Dec 15 15:34:38.927 INFO [stderr] 
Dec 15 15:34:38.927 INFO [stderr] warning: unused import: `::Trie`
Dec 15 15:34:38.927 INFO [stderr]  --> src/database/memory.rs:1:5
Dec 15 15:34:38.927 INFO [stderr]   |
Dec 15 15:34:38.927 INFO [stderr] 1 | use ::Trie;
Dec 15 15:34:38.927 INFO [stderr]   |     ^^^^^^
Dec 15 15:34:38.927 INFO [stderr] 
Dec 15 15:34:38.927 INFO [stderr] warning: unused import: `DatabaseOwned`
Dec 15 15:34:38.927 INFO [stderr]  --> src/database/memory.rs:2:23
Dec 15 15:34:38.927 INFO [stderr]   |
Dec 15 15:34:38.927 INFO [stderr] 2 | use super::{Database, DatabaseOwned, DatabaseGuard};
Dec 15 15:34:38.927 INFO [stderr]   |                       ^^^^^^^^^^^^^
Dec 15 15:34:38.927 INFO [stderr] 
Dec 15 15:34:39.215 INFO [stderr] warning: unused import: `Hasher`
Dec 15 15:34:39.215 INFO [stderr]  --> src/merkle/nibble.rs:4:23
Dec 15 15:34:39.215 INFO [stderr]   |
Dec 15 15:34:39.215 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 15 15:34:39.215 INFO [stderr]   |                       ^^^^^^
Dec 15 15:34:39.215 INFO [stderr] 
Dec 15 15:34:39.215 INFO [stderr] warning: unused import: `Decodable`
Dec 15 15:34:39.215 INFO [stderr]  --> src/merkle/node.rs:3:39
Dec 15 15:34:39.215 INFO [stderr]   |
Dec 15 15:34:39.215 INFO [stderr] 3 | use rlp::{self, RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 15 15:34:39.215 INFO [stderr]   |                                       ^^^^^^^^^
Dec 15 15:34:39.215 INFO [stderr] 
Dec 15 15:34:39.239 INFO [stderr] warning: unused variable: `value`
Dec 15 15:34:39.239 INFO [stderr]    --> src/lib.rs:283:74
Dec 15 15:34:39.239 INFO [stderr]     |
Dec 15 15:34:39.239 INFO [stderr] 283 |             let submap = Self::build_submap(1, map.iter().filter(|&(key, value)| {
Dec 15 15:34:39.239 INFO [stderr]     |                                                                          ^^^^^ help: consider using `_value` instead
Dec 15 15:34:39.239 INFO [stderr]     |
Dec 15 15:34:39.239 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 15 15:34:39.239 INFO [stderr] 
Dec 15 15:34:39.239 INFO [stderr] warning: unused variable: `value`
Dec 15 15:34:39.239 INFO [stderr]    --> src/lib.rs:296:29
Dec 15 15:34:39.239 INFO [stderr]     |
Dec 15 15:34:39.239 INFO [stderr] 296 |             .filter(|&(key, value)| key.len() == 0).next()
Dec 15 15:34:39.239 INFO [stderr]     |                             ^^^^^ help: consider using `_value` instead
Dec 15 15:34:39.239 INFO [stderr] 
Dec 15 15:34:39.239 INFO [stderr] warning: unused variable: `key`
Dec 15 15:34:39.239 INFO [stderr]    --> src/lib.rs:297:20
Dec 15 15:34:39.239 INFO [stderr]     |
Dec 15 15:34:39.239 INFO [stderr] 297 |             .map(|(key, value)| value.clone());
Dec 15 15:34:39.239 INFO [stderr]     |                    ^^^ help: consider using `_key` instead
Dec 15 15:34:39.239 INFO [stderr] 
Dec 15 15:34:39.239 INFO [stderr] warning: unused variable: `sub_nodes`
Dec 15 15:34:39.239 INFO [stderr]    --> src/lib.rs:632:44
Dec 15 15:34:39.239 INFO [stderr]     |
Dec 15 15:34:39.239 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 15 15:34:39.239 INFO [stderr]     |                                            ^^^^^^^^^ help: consider using `_sub_nodes` instead
Dec 15 15:34:39.239 INFO [stderr] 
Dec 15 15:34:39.239 INFO [stderr] warning: unused variable: `sub_additional`
Dec 15 15:34:39.239 INFO [stderr]    --> src/lib.rs:632:55
Dec 15 15:34:39.239 INFO [stderr]     |
Dec 15 15:34:39.239 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 15 15:34:39.239 INFO [stderr]     |                                                       ^^^^^^^^^^^^^^ help: consider using `_sub_additional` instead
Dec 15 15:34:39.239 INFO [stderr] 
Dec 15 15:34:39.359 INFO [stderr] warning: method is never used: `free`
Dec 15 15:34:39.359 INFO [stderr]   --> src/database/mod.rs:96:5
Dec 15 15:34:39.359 INFO [stderr]    |
Dec 15 15:34:39.359 INFO [stderr] 96 |     pub fn free<'b>(&'b mut self, hash: H256) {
Dec 15 15:34:39.359 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 15:34:39.359 INFO [stderr]    |
Dec 15 15:34:39.359 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 15:34:39.359 INFO [stderr] 
Dec 15 15:34:39.359 INFO [stderr] warning: field is never used: `freed`
Dec 15 15:34:39.359 INFO [stderr]    --> src/database/mod.rs:123:5
Dec 15 15:34:39.359 INFO [stderr]     |
Dec 15 15:34:39.359 INFO [stderr] 123 |     freed: Vec<H256>,
Dec 15 15:34:39.359 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 15 15:34:39.359 INFO [stderr] 
Dec 15 15:34:40.202 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.16s
Dec 15 15:34:40.219 INFO [stderr] su: No module specific data is present
Dec 15 15:34:40.811 INFO running `"docker" "inspect" "f8d28cc0b5b87baac1c8e5b4f79452b0615b9b920a4ca90b5693c1cae26997ec"`
Dec 15 15:34:41.004 INFO running `"docker" "rm" "-f" "f8d28cc0b5b87baac1c8e5b4f79452b0615b9b920a4ca90b5693c1cae26997ec"`
Dec 15 15:34:41.127 INFO [stdout] f8d28cc0b5b87baac1c8e5b4f79452b0615b9b920a4ca90b5693c1cae26997ec
Dec 15 15:34:41.129 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 15:34:41.521 INFO [stdout] 84d04d9a4dd7e08ddc7e38a72274f1a125e766ec11dab77d59537af33d41b5e2
Dec 15 15:34:41.523 INFO running `"docker" "start" "-a" "84d04d9a4dd7e08ddc7e38a72274f1a125e766ec11dab77d59537af33d41b5e2"`
Dec 15 15:34:42.112 INFO [stderr] usermod: no changes
Dec 15 15:34:42.171 INFO [stderr]    Compiling ethereum-trie-test v0.3.9 (/source)
Dec 15 15:34:43.639 INFO [stderr] warning: unused imports: `DerefMut`, `Deref`
Dec 15 15:34:43.639 INFO [stderr]   --> src/lib.rs:12:16
Dec 15 15:34:43.639 INFO [stderr]    |
Dec 15 15:34:43.639 INFO [stderr] 12 | use std::ops::{Deref, DerefMut};
Dec 15 15:34:43.639 INFO [stderr]    |                ^^^^^  ^^^^^^^^
Dec 15 15:34:43.639 INFO [stderr]    |
Dec 15 15:34:43.639 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 15 15:34:43.639 INFO [stderr] 
Dec 15 15:34:43.639 INFO [stderr] warning: unused imports: `Decodable`, `Encodable`, `Prototype`
Dec 15 15:34:43.639 INFO [stderr]  --> src/merkle/nibble.rs:1:22
Dec 15 15:34:43.639 INFO [stderr]   |
Dec 15 15:34:43.639 INFO [stderr] 1 | use rlp::{RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 15 15:34:43.639 INFO [stderr]   |                      ^^^^^^^^^  ^^^^^^^^^       ^^^^^^^^^
Dec 15 15:34:43.639 INFO [stderr] 
Dec 15 15:34:43.639 INFO [stderr] warning: unused import: `std::ops::Deref`
Dec 15 15:34:43.639 INFO [stderr]  --> src/merkle/nibble.rs:2:5
Dec 15 15:34:43.639 INFO [stderr]   |
Dec 15 15:34:43.639 INFO [stderr] 2 | use std::ops::Deref;
Dec 15 15:34:43.639 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 15 15:34:43.639 INFO [stderr] 
Dec 15 15:34:43.639 INFO [stderr] warning: unused import: `Hash`
Dec 15 15:34:43.639 INFO [stderr]  --> src/merkle/nibble.rs:4:17
Dec 15 15:34:43.639 INFO [stderr]   |
Dec 15 15:34:43.639 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 15 15:34:43.639 INFO [stderr]   |                 ^^^^
Dec 15 15:34:43.639 INFO [stderr] 
Dec 15 15:34:43.639 INFO [stderr] warning: unused imports: `Debug`, `Formatter`, `self`
Dec 15 15:34:43.639 INFO [stderr]  --> src/merkle/nibble.rs:5:16
Dec 15 15:34:43.639 INFO [stderr]   |
Dec 15 15:34:43.639 INFO [stderr] 5 | use std::fmt::{self, Debug, Formatter};
Dec 15 15:34:43.639 INFO [stderr]   |                ^^^^  ^^^^^  ^^^^^^^^^
Dec 15 15:34:43.639 INFO [stderr] 
Dec 15 15:34:43.639 INFO [stderr] warning: unused imports: `NibbleSlice`, `Nibble`
Dec 15 15:34:43.639 INFO [stderr]  --> src/merkle/node.rs:1:27
Dec 15 15:34:43.639 INFO [stderr]   |
Dec 15 15:34:43.639 INFO [stderr] 1 | use super::nibble::{self, Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 15 15:34:43.639 INFO [stderr]   |                           ^^^^^^             ^^^^^^^^^^^
Dec 15 15:34:43.639 INFO [stderr] 
Dec 15 15:34:43.639 INFO [stderr] warning: unused import: `Keccak256`
Dec 15 15:34:43.639 INFO [stderr]    --> src/merkle/node.rs:157:24
Dec 15 15:34:43.639 INFO [stderr]     |
Dec 15 15:34:43.640 INFO [stderr] 157 |     use sha3::{Digest, Keccak256};
Dec 15 15:34:43.640 INFO [stderr]     |                        ^^^^^^^^^
Dec 15 15:34:43.640 INFO [stderr] 
Dec 15 15:34:43.640 INFO [stderr] warning: unused imports: `NibbleSlice`, `NibbleVec`, `Nibble`
Dec 15 15:34:43.640 INFO [stderr]    --> src/merkle/node.rs:158:32
Dec 15 15:34:43.640 INFO [stderr]     |
Dec 15 15:34:43.640 INFO [stderr] 158 |     use merkle::nibble::{self, NibbleVec, NibbleSlice, Nibble};
Dec 15 15:34:43.640 INFO [stderr]     |                                ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^
Dec 15 15:34:43.640 INFO [stderr] 
Dec 15 15:34:43.640 INFO [stderr] warning: unused imports: `NibbleSlice`, `NibbleType`, `NibbleVec`, `Nibble`
Dec 15 15:34:43.640 INFO [stderr]  --> src/merkle/mod.rs:4:20
Dec 15 15:34:43.640 INFO [stderr]   |
Dec 15 15:34:43.640 INFO [stderr] 4 | use self::nibble::{Nibble, NibbleVec, NibbleSlice, NibbleType};
Dec 15 15:34:43.640 INFO [stderr]   |                    ^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
Dec 15 15:34:43.640 INFO [stderr] 
Dec 15 15:34:43.640 INFO [stderr] warning: unused import: `::Trie`
Dec 15 15:34:43.640 INFO [stderr]  --> src/database/memory.rs:1:5
Dec 15 15:34:43.640 INFO [stderr]   |
Dec 15 15:34:43.640 INFO [stderr] 1 | use ::Trie;
Dec 15 15:34:43.640 INFO [stderr]   |     ^^^^^^
Dec 15 15:34:43.640 INFO [stderr] 
Dec 15 15:34:43.640 INFO [stderr] warning: unused import: `DatabaseOwned`
Dec 15 15:34:43.640 INFO [stderr]  --> src/database/memory.rs:2:23
Dec 15 15:34:43.640 INFO [stderr]   |
Dec 15 15:34:43.640 INFO [stderr] 2 | use super::{Database, DatabaseOwned, DatabaseGuard};
Dec 15 15:34:43.640 INFO [stderr]   |                       ^^^^^^^^^^^^^
Dec 15 15:34:43.640 INFO [stderr] 
Dec 15 15:34:43.640 INFO [stderr] warning: unused import: `std::cell::UnsafeCell`
Dec 15 15:34:43.640 INFO [stderr]    --> src/lib.rs:726:9
Dec 15 15:34:43.640 INFO [stderr]     |
Dec 15 15:34:43.640 INFO [stderr] 726 |     use std::cell::UnsafeCell;
Dec 15 15:34:43.640 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
Dec 15 15:34:43.640 INFO [stderr] 
Dec 15 15:34:44.007 INFO [stderr] warning: unused import: `Hasher`
Dec 15 15:34:44.007 INFO [stderr]  --> src/merkle/nibble.rs:4:23
Dec 15 15:34:44.007 INFO [stderr]   |
Dec 15 15:34:44.007 INFO [stderr] 4 | use std::hash::{Hash, Hasher};
Dec 15 15:34:44.007 INFO [stderr]   |                       ^^^^^^
Dec 15 15:34:44.007 INFO [stderr] 
Dec 15 15:34:44.007 INFO [stderr] warning: unused import: `Decodable`
Dec 15 15:34:44.007 INFO [stderr]  --> src/merkle/node.rs:3:39
Dec 15 15:34:44.007 INFO [stderr]   |
Dec 15 15:34:44.007 INFO [stderr] 3 | use rlp::{self, RlpStream, Encodable, Decodable, Rlp, Prototype};
Dec 15 15:34:44.007 INFO [stderr]   |                                       ^^^^^^^^^
Dec 15 15:34:44.007 INFO [stderr] 
Dec 15 15:34:44.007 INFO [stderr] warning: unused import: `Digest`
Dec 15 15:34:44.007 INFO [stderr]    --> src/merkle/node.rs:157:16
Dec 15 15:34:44.007 INFO [stderr]     |
Dec 15 15:34:44.007 INFO [stderr] 157 |     use sha3::{Digest, Keccak256};
Dec 15 15:34:44.007 INFO [stderr]     |                ^^^^^^
Dec 15 15:34:44.007 INFO [stderr] 
Dec 15 15:34:44.007 INFO [stderr] warning: unused import: `DatabaseGuard`
Dec 15 15:34:44.007 INFO [stderr]    --> src/lib.rs:723:17
Dec 15 15:34:44.007 INFO [stderr]     |
Dec 15 15:34:44.007 INFO [stderr] 723 |     use super::{DatabaseGuard, Trie};
Dec 15 15:34:44.007 INFO [stderr]     |                 ^^^^^^^^^^^^^
Dec 15 15:34:44.007 INFO [stderr] 
Dec 15 15:34:44.045 INFO [stderr] warning: unused variable: `value`
Dec 15 15:34:44.045 INFO [stderr]    --> src/lib.rs:283:74
Dec 15 15:34:44.045 INFO [stderr]     |
Dec 15 15:34:44.045 INFO [stderr] 283 |             let submap = Self::build_submap(1, map.iter().filter(|&(key, value)| {
Dec 15 15:34:44.045 INFO [stderr]     |                                                                          ^^^^^ help: consider using `_value` instead
Dec 15 15:34:44.045 INFO [stderr]     |
Dec 15 15:34:44.046 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 15 15:34:44.046 INFO [stderr] 
Dec 15 15:34:44.046 INFO [stderr] warning: unused variable: `value`
Dec 15 15:34:44.046 INFO [stderr]    --> src/lib.rs:296:29
Dec 15 15:34:44.046 INFO [stderr]     |
Dec 15 15:34:44.046 INFO [stderr] 296 |             .filter(|&(key, value)| key.len() == 0).next()
Dec 15 15:34:44.046 INFO [stderr]     |                             ^^^^^ help: consider using `_value` instead
Dec 15 15:34:44.046 INFO [stderr] 
Dec 15 15:34:44.046 INFO [stderr] warning: unused variable: `key`
Dec 15 15:34:44.046 INFO [stderr]    --> src/lib.rs:297:20
Dec 15 15:34:44.046 INFO [stderr]     |
Dec 15 15:34:44.046 INFO [stderr] 297 |             .map(|(key, value)| value.clone());
Dec 15 15:34:44.046 INFO [stderr]     |                    ^^^ help: consider using `_key` instead
Dec 15 15:34:44.046 INFO [stderr] 
Dec 15 15:34:44.046 INFO [stderr] warning: unused variable: `sub_nodes`
Dec 15 15:34:44.046 INFO [stderr]    --> src/lib.rs:632:44
Dec 15 15:34:44.046 INFO [stderr]     |
Dec 15 15:34:44.046 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 15 15:34:44.046 INFO [stderr]     |                                            ^^^^^^^^^ help: consider using `_sub_nodes` instead
Dec 15 15:34:44.046 INFO [stderr] 
Dec 15 15:34:44.046 INFO [stderr] warning: unused variable: `sub_additional`
Dec 15 15:34:44.046 INFO [stderr]    --> src/lib.rs:632:55
Dec 15 15:34:44.046 INFO [stderr]     |
Dec 15 15:34:44.046 INFO [stderr] 632 |                         MerkleNode::Branch(sub_nodes, sub_additional) => {
Dec 15 15:34:44.046 INFO [stderr]     |                                                       ^^^^^^^^^^^^^^ help: consider using `_sub_additional` instead
Dec 15 15:34:44.046 INFO [stderr] 
Dec 15 15:34:44.125 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.125 INFO [stderr]    --> src/lib.rs:740:13
Dec 15 15:34:44.125 INFO [stderr]     |
Dec 15 15:34:44.125 INFO [stderr] 740 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.125 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.125 INFO [stderr]     |             |
Dec 15 15:34:44.126 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.126 INFO [stderr]     |
Dec 15 15:34:44.126 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 15 15:34:44.126 INFO [stderr] 
Dec 15 15:34:44.127 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.127 INFO [stderr]    --> src/lib.rs:756:13
Dec 15 15:34:44.127 INFO [stderr]     |
Dec 15 15:34:44.128 INFO [stderr] 756 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.128 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.128 INFO [stderr]     |             |
Dec 15 15:34:44.128 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.128 INFO [stderr] 
Dec 15 15:34:44.132 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.132 INFO [stderr]    --> src/lib.rs:776:13
Dec 15 15:34:44.132 INFO [stderr]     |
Dec 15 15:34:44.132 INFO [stderr] 776 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.132 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.133 INFO [stderr]     |             |
Dec 15 15:34:44.133 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.133 INFO [stderr] 
Dec 15 15:34:44.133 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.133 INFO [stderr]    --> src/lib.rs:801:13
Dec 15 15:34:44.134 INFO [stderr]     |
Dec 15 15:34:44.134 INFO [stderr] 801 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.134 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.134 INFO [stderr]     |             |
Dec 15 15:34:44.134 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.134 INFO [stderr] 
Dec 15 15:34:44.135 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.135 INFO [stderr]    --> src/lib.rs:812:13
Dec 15 15:34:44.135 INFO [stderr]     |
Dec 15 15:34:44.135 INFO [stderr] 812 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.135 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.135 INFO [stderr]     |             |
Dec 15 15:34:44.136 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.136 INFO [stderr] 
Dec 15 15:34:44.137 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.137 INFO [stderr]    --> src/lib.rs:825:13
Dec 15 15:34:44.137 INFO [stderr]     |
Dec 15 15:34:44.138 INFO [stderr] 825 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.138 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.138 INFO [stderr]     |             |
Dec 15 15:34:44.138 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.138 INFO [stderr] 
Dec 15 15:34:44.139 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.139 INFO [stderr]    --> src/lib.rs:841:13
Dec 15 15:34:44.139 INFO [stderr]     |
Dec 15 15:34:44.139 INFO [stderr] 841 |         let mut map = HashMap::new();
Dec 15 15:34:44.139 INFO [stderr]     |             ----^^^
Dec 15 15:34:44.139 INFO [stderr]     |             |
Dec 15 15:34:44.140 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.140 INFO [stderr] 
Dec 15 15:34:44.140 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.140 INFO [stderr]    --> src/lib.rs:843:13
Dec 15 15:34:44.140 INFO [stderr]     |
Dec 15 15:34:44.140 INFO [stderr] 843 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.140 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.140 INFO [stderr]     |             |
Dec 15 15:34:44.141 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.141 INFO [stderr] 
Dec 15 15:34:44.141 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.141 INFO [stderr]    --> src/lib.rs:854:13
Dec 15 15:34:44.141 INFO [stderr]     |
Dec 15 15:34:44.141 INFO [stderr] 854 |         let mut map = HashMap::new();
Dec 15 15:34:44.141 INFO [stderr]     |             ----^^^
Dec 15 15:34:44.141 INFO [stderr]     |             |
Dec 15 15:34:44.142 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.142 INFO [stderr] 
Dec 15 15:34:44.142 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.142 INFO [stderr]    --> src/lib.rs:856:13
Dec 15 15:34:44.142 INFO [stderr]     |
Dec 15 15:34:44.142 INFO [stderr] 856 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.142 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.142 INFO [stderr]     |             |
Dec 15 15:34:44.143 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.143 INFO [stderr] 
Dec 15 15:34:44.143 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.143 INFO [stderr]    --> src/lib.rs:869:13
Dec 15 15:34:44.143 INFO [stderr]     |
Dec 15 15:34:44.143 INFO [stderr] 869 |         let mut map = HashMap::new();
Dec 15 15:34:44.143 INFO [stderr]     |             ----^^^
Dec 15 15:34:44.143 INFO [stderr]     |             |
Dec 15 15:34:44.143 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.143 INFO [stderr] 
Dec 15 15:34:44.143 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.144 INFO [stderr]    --> src/lib.rs:871:13
Dec 15 15:34:44.144 INFO [stderr]     |
Dec 15 15:34:44.144 INFO [stderr] 871 |         let mut database: HashMap<H256, Vec<u8>> = HashMap::new();
Dec 15 15:34:44.144 INFO [stderr]     |             ----^^^^^^^^
Dec 15 15:34:44.144 INFO [stderr]     |             |
Dec 15 15:34:44.144 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.144 INFO [stderr] 
Dec 15 15:34:44.144 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:34:44.144 INFO [stderr]    --> src/lib.rs:872:13
Dec 15 15:34:44.144 INFO [stderr]     |
Dec 15 15:34:44.144 INFO [stderr] 872 |         let mut trie: Trie<HashMap<H256, Vec<u8>>> = Trie::build(database, &map);
Dec 15 15:34:44.145 INFO [stderr]     |             ----^^^^
Dec 15 15:34:44.145 INFO [stderr]     |             |
Dec 15 15:34:44.145 INFO [stderr]     |             help: remove this `mut`
Dec 15 15:34:44.145 INFO [stderr] 
Dec 15 15:34:44.220 INFO [stderr] warning: method is never used: `free`
Dec 15 15:34:44.220 INFO [stderr]   --> src/database/mod.rs:96:5
Dec 15 15:34:44.221 INFO [stderr]    |
Dec 15 15:34:44.221 INFO [stderr] 96 |     pub fn free<'b>(&'b mut self, hash: H256) {
Dec 15 15:34:44.221 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 15:34:44.221 INFO [stderr]    |
Dec 15 15:34:44.221 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 15:34:44.221 INFO [stderr] 
Dec 15 15:34:44.221 INFO [stderr] warning: field is never used: `freed`
Dec 15 15:34:44.221 INFO [stderr]    --> src/database/mod.rs:123:5
Dec 15 15:34:44.221 INFO [stderr]     |
Dec 15 15:34:44.221 INFO [stderr] 123 |     freed: Vec<H256>,
Dec 15 15:34:44.221 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 15 15:34:44.221 INFO [stderr] 
Dec 15 15:34:45.664 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.53s
Dec 15 15:34:45.669 INFO [stderr] su: No module specific data is present
Dec 15 15:34:46.096 INFO running `"docker" "inspect" "84d04d9a4dd7e08ddc7e38a72274f1a125e766ec11dab77d59537af33d41b5e2"`
Dec 15 15:34:46.223 INFO running `"docker" "rm" "-f" "84d04d9a4dd7e08ddc7e38a72274f1a125e766ec11dab77d59537af33d41b5e2"`
Dec 15 15:34:46.434 INFO [stdout] 84d04d9a4dd7e08ddc7e38a72274f1a125e766ec11dab77d59537af33d41b5e2
Dec 15 15:34:46.439 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 15:34:46.974 INFO [stdout] 365eb880fc3436b51c785db50f804d909bdf999ac527679010e09e26f72139c2
Dec 15 15:34:46.976 INFO running `"docker" "start" "-a" "365eb880fc3436b51c785db50f804d909bdf999ac527679010e09e26f72139c2"`
Dec 15 15:34:47.395 INFO [stderr] usermod: no changes
Dec 15 15:34:47.454 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Dec 15 15:34:47.471 INFO [stderr]      Running /target/debug/deps/trie_test-4239616a3d9f5af6
Dec 15 15:34:47.479 INFO [stdout] 
Dec 15 15:34:47.479 INFO [stdout] running 12 tests
Dec 15 15:34:47.484 INFO [stdout] test merkle::nibble::tests::from_into_key ... ok
Dec 15 15:34:47.484 INFO [stdout] test merkle::node::tests::decode_genesis_state ... ok
Dec 15 15:34:47.484 INFO [stdout] test merkle::node::tests::encode_decode ... ok
Dec 15 15:34:47.485 INFO [stdout] test tests::insert_single_item ... ok
Dec 15 15:34:47.485 INFO [stdout] test tests::trie_empty ... ok
Dec 15 15:34:47.485 INFO [stdout] test tests::sub_genesis ... ok
Dec 15 15:34:47.491 INFO [stdout] test tests::insert_middle_leaf ... ok
Dec 15 15:34:47.501 INFO [stdout] test tests::testy ... ok
Dec 15 15:34:47.501 INFO [stdout] test tests::insert_animals ... ok
Dec 15 15:34:47.502 INFO [stdout] test tests::trie_delete ... ok
Dec 15 15:34:47.506 INFO [stdout] test tests::trie_insert ... ok
Dec 15 15:34:47.506 INFO [stdout] test tests::trie_middle_leaf ... ok
Dec 15 15:34:47.506 INFO [stdout] 
Dec 15 15:34:47.506 INFO [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 15:34:47.506 INFO [stdout] 
Dec 15 15:34:47.511 INFO [stderr]    Doc-tests trie_test
Dec 15 15:34:50.387 INFO [stdout] 
Dec 15 15:34:50.387 INFO [stdout] running 0 tests
Dec 15 15:34:50.387 INFO [stdout] 
Dec 15 15:34:50.387 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 15:34:50.387 INFO [stdout] 
Dec 15 15:34:50.396 INFO [stderr] su: No module specific data is present
Dec 15 15:34:50.859 INFO running `"docker" "inspect" "365eb880fc3436b51c785db50f804d909bdf999ac527679010e09e26f72139c2"`
Dec 15 15:34:50.946 INFO running `"docker" "rm" "-f" "365eb880fc3436b51c785db50f804d909bdf999ac527679010e09e26f72139c2"`
Dec 15 15:34:51.044 INFO [stdout] 365eb880fc3436b51c785db50f804d909bdf999ac527679010e09e26f72139c2