[INFO] updating cached repository Riuchando/adventofcode2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Riuchando/adventofcode2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Riuchando/adventofcode2018" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/Riuchando/adventofcode2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/Riuchando/adventofcode2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Riuchando/adventofcode2018" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/Riuchando/adventofcode2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/Riuchando/adventofcode2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9fc98b42c72e11e13148a53f356b5b1d27b9e690
[INFO] sha for GitHub repo Riuchando/adventofcode2018: 9fc98b42c72e11e13148a53f356b5b1d27b9e690
[INFO] validating manifest of Riuchando/adventofcode2018 on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Riuchando/adventofcode2018 on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Riuchando/adventofcode2018
[INFO] finished frobbing Riuchando/adventofcode2018
[INFO] frobbed toml for Riuchando/adventofcode2018 written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/Riuchando/adventofcode2018/Cargo.toml
[INFO] started frobbing Riuchando/adventofcode2018
[INFO] finished frobbing Riuchando/adventofcode2018
[INFO] frobbed toml for Riuchando/adventofcode2018 written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/Riuchando/adventofcode2018/Cargo.toml
[INFO] crate Riuchando/adventofcode2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Riuchando/adventofcode2018 against try#06a150c7d11500b41499224f165e9de1de096768 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-6/try#06a150c7d11500b41499224f165e9de1de096768:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/Riuchando/adventofcode2018:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+06a150c7d11500b41499224f165e9de1de096768-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0f95c4498bc6897babbba40b7a5201d3b4441fc9ffa0242e874beab866083517
[INFO] running `"docker" "start" "-a" "0f95c4498bc6897babbba40b7a5201d3b4441fc9ffa0242e874beab866083517"`
[INFO] [stderr]     Checking daggy v0.6.0
[INFO] [stderr]     Checking adventofcode2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashSet`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::HashSet;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::hash::Hash`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::hash::Hash;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `itertools::Itertools`
[INFO] [stderr]  --> src/day4.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use itertools::Itertools;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `chrono::prelude::*`
[INFO] [stderr]  --> src/day5.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use chrono::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `itertools::Itertools`
[INFO] [stderr]  --> src/day5.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use itertools::Itertools;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/day5.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/day5.rs:56:27
[INFO] [stderr]    |
[INFO] [stderr] 56 |                   } else if (ascii_int as u8 as char == character.to_ascii_uppercase()
[INFO] [stderr]    |  ___________________________^
[INFO] [stderr] 57 | |                     || ascii_int as u8 as char == character.to_ascii_lowercase())
[INFO] [stderr]    | |_________________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 } else if ascii_int as u8 as char == character.to_ascii_uppercase()
[INFO] [stderr] 57 |                     || ascii_int as u8 as char == character.to_ascii_lowercase()
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/day5.rs:60:27
[INFO] [stderr]    |
[INFO] [stderr] 60 |                   } else if (match left_vec.last() {
[INFO] [stderr]    |  ___________________________^
[INFO] [stderr] 61 | |                     Some(x) => {
[INFO] [stderr] 62 | |                         (x.is_ascii_uppercase()
[INFO] [stderr] 63 | |                             && character.is_ascii_lowercase()
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |                     None => false,
[INFO] [stderr] 70 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 60 |                 } else if match left_vec.last() {
[INFO] [stderr] 61 |                     Some(x) => {
[INFO] [stderr] 62 |                         (x.is_ascii_uppercase()
[INFO] [stderr] 63 |                             && character.is_ascii_lowercase()
[INFO] [stderr] 64 |                             && character.to_ascii_uppercase() == *x
[INFO] [stderr] 65 |                             || (left_vec.last().unwrap().is_ascii_lowercase()
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `chrono::prelude::*`
[INFO] [stderr]  --> src/day6.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use chrono::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/day6.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::EdgeType`
[INFO] [stderr]  --> src/day7.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use petgraph::EdgeType;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `dominators`, `has_path_connecting`, `is_cyclic_undirected`, `is_isomorphic_matching`, `min_spanning_tree`
[INFO] [stderr]   --> src/day7.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     dominators, has_path_connecting, is_cyclic_undirected, is_isomorphic_matching,
[INFO] [stderr]    |     ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 15 |     min_spanning_tree,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::graph::node_index as n`
[INFO] [stderr]   --> src/day7.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use petgraph::graph::node_index as n;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DfsSpace`, `astar`, `dijkstra`
[INFO] [stderr]   --> src/day7.rs:21:22
[INFO] [stderr]    |
[INFO] [stderr] 21 | use petgraph::algo::{astar, dijkstra, DfsSpace};
[INFO] [stderr]    |                      ^^^^^  ^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `IntoNodeIdentifiers`, `NodeFiltered`, `Reversed`, `Topo`, `VisitMap`, `Walker`
[INFO] [stderr]   --> src/day7.rs:23:20
[INFO] [stderr]    |
[INFO] [stderr] 23 |     IntoNeighbors, IntoNodeIdentifiers, NodeFiltered, Reversed, Topo, VisitMap, Walker,
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^  ^^^^  ^^^^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::dot::Dot`
[INFO] [stderr]   --> src/day7.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | use petgraph::dot::Dot;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashSet`
[INFO] [stderr]   --> src/day7.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | use std::collections::HashSet;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::hash::Hash`
[INFO] [stderr]   --> src/day7.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | use std::hash::Hash;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::prelude::*`
[INFO] [stderr]   --> src/day7.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | use petgraph::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashSet`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::HashSet;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::hash::Hash`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::hash::Hash;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `itertools::Itertools`
[INFO] [stderr]  --> src/day4.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use itertools::Itertools;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `chrono::prelude::*`
[INFO] [stderr]  --> src/day5.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use chrono::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `itertools::Itertools`
[INFO] [stderr]  --> src/day5.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use itertools::Itertools;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/day5.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/day5.rs:56:27
[INFO] [stderr]    |
[INFO] [stderr] 56 |                   } else if (ascii_int as u8 as char == character.to_ascii_uppercase()
[INFO] [stderr]    |  ___________________________^
[INFO] [stderr] 57 | |                     || ascii_int as u8 as char == character.to_ascii_lowercase())
[INFO] [stderr]    | |_________________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 } else if ascii_int as u8 as char == character.to_ascii_uppercase()
[INFO] [stderr] 57 |                     || ascii_int as u8 as char == character.to_ascii_lowercase()
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/day5.rs:60:27
[INFO] [stderr]    |
[INFO] [stderr] 60 |                   } else if (match left_vec.last() {
[INFO] [stderr]    |  ___________________________^
[INFO] [stderr] 61 | |                     Some(x) => {
[INFO] [stderr] 62 | |                         (x.is_ascii_uppercase()
[INFO] [stderr] 63 | |                             && character.is_ascii_lowercase()
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |                     None => false,
[INFO] [stderr] 70 | |                 }) {
[INFO] [stderr]    | |__________________^
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 60 |                 } else if match left_vec.last() {
[INFO] [stderr] 61 |                     Some(x) => {
[INFO] [stderr] 62 |                         (x.is_ascii_uppercase()
[INFO] [stderr] 63 |                             && character.is_ascii_lowercase()
[INFO] [stderr] 64 |                             && character.to_ascii_uppercase() == *x
[INFO] [stderr] 65 |                             || (left_vec.last().unwrap().is_ascii_lowercase()
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `chrono::prelude::*`
[INFO] [stderr]  --> src/day6.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use chrono::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/day6.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::EdgeType`
[INFO] [stderr]  --> src/day7.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use petgraph::EdgeType;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `dominators`, `has_path_connecting`, `is_cyclic_undirected`, `is_isomorphic_matching`, `min_spanning_tree`
[INFO] [stderr]   --> src/day7.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     dominators, has_path_connecting, is_cyclic_undirected, is_isomorphic_matching,
[INFO] [stderr]    |     ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 15 |     min_spanning_tree,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::graph::node_index as n`
[INFO] [stderr]   --> src/day7.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use petgraph::graph::node_index as n;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DfsSpace`, `astar`, `dijkstra`
[INFO] [stderr]   --> src/day7.rs:21:22
[INFO] [stderr]    |
[INFO] [stderr] 21 | use petgraph::algo::{astar, dijkstra, DfsSpace};
[INFO] [stderr]    |                      ^^^^^  ^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `IntoNodeIdentifiers`, `NodeFiltered`, `Reversed`, `Topo`, `VisitMap`, `Walker`
[INFO] [stderr]   --> src/day7.rs:23:20
[INFO] [stderr]    |
[INFO] [stderr] 23 |     IntoNeighbors, IntoNodeIdentifiers, NodeFiltered, Reversed, Topo, VisitMap, Walker,
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^  ^^^^  ^^^^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::dot::Dot`
[INFO] [stderr]   --> src/day7.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | use petgraph::dot::Dot;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashSet`
[INFO] [stderr]   --> src/day7.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | use std::collections::HashSet;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::hash::Hash`
[INFO] [stderr]   --> src/day7.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | use std::hash::Hash;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::prelude::*`
[INFO] [stderr]   --> src/day7.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | use petgraph::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::graph::IndexType`
[INFO] [stderr]   --> src/day7.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use petgraph::graph::IndexType;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IntoNeighbors`
[INFO] [stderr]   --> src/day7.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     IntoNeighbors, IntoNodeIdentifiers, NodeFiltered, Reversed, Topo, VisitMap, Walker,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::graph::IndexType`
[INFO] [stderr]   --> src/day7.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use petgraph::graph::IndexType;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IntoNeighbors`
[INFO] [stderr]   --> src/day7.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     IntoNeighbors, IntoNodeIdentifiers, NodeFiltered, Reversed, Topo, VisitMap, Walker,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]    --> src/day6.rs:186:42
[INFO] [stderr]     |
[INFO] [stderr] 186 |     Ok(match index_sizes.iter().max_by(|(k, v), (a, b)| v.cmp(a)) {
[INFO] [stderr]     |                                          ^ help: consider prefixing with an underscore: `_k`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> src/day6.rs:186:53
[INFO] [stderr]     |
[INFO] [stderr] 186 |     Ok(match index_sizes.iter().max_by(|(k, v), (a, b)| v.cmp(a)) {
[INFO] [stderr]     |                                                     ^ help: consider prefixing with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/day7.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |     let f = BufReader::new(f);
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]    --> src/day6.rs:186:42
[INFO] [stderr]     |
[INFO] [stderr] 186 |     Ok(match index_sizes.iter().max_by(|(k, v), (a, b)| v.cmp(a)) {
[INFO] [stderr]     |                                          ^ help: consider prefixing with an underscore: `_k`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> src/day6.rs:186:53
[INFO] [stderr]     |
[INFO] [stderr] 186 |     Ok(match index_sizes.iter().max_by(|(k, v), (a, b)| v.cmp(a)) {
[INFO] [stderr]     |                                                     ^ help: consider prefixing with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/day7.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |     let f = BufReader::new(f);
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day6.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let mut ring = 0;
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day6.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let mut ring = 0;
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `part1_wavefront`
[INFO] [stderr]   --> src/day6.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn part1_wavefront() -> Result<u32, Error> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/day7.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/day7.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `part1_wavefront`
[INFO] [stderr]   --> src/day6.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn part1_wavefront() -> Result<u32, Error> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/day7.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/day7.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.96s
[INFO] running `"docker" "inspect" "0f95c4498bc6897babbba40b7a5201d3b4441fc9ffa0242e874beab866083517"`
[INFO] running `"docker" "rm" "-f" "0f95c4498bc6897babbba40b7a5201d3b4441fc9ffa0242e874beab866083517"`
[INFO] [stdout] 0f95c4498bc6897babbba40b7a5201d3b4441fc9ffa0242e874beab866083517