[INFO] cloning repository https://github.com/ztmark/aoc2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ztmark/aoc2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fztmark%2Faoc2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fztmark%2Faoc2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d1941056a07091a3f7187fa9ddf7c207d7e339a
[INFO] checking ztmark/aoc2018 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fztmark%2Faoc2018" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ztmark/aoc2018 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ztmark/aoc2018
[INFO] finished tweaking git repo https://github.com/ztmark/aoc2018
[INFO] tweaked toml for git repo https://github.com/ztmark/aoc2018 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/ztmark/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 817e571a296202eab5aa90816e956a057d393ff580d982678406942072f3f77a
[INFO] running `Command { std: "docker" "start" "-a" "817e571a296202eab5aa90816e956a057d393ff580d982678406942072f3f77a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "817e571a296202eab5aa90816e956a057d393ff580d982678406942072f3f77a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "817e571a296202eab5aa90816e956a057d393ff580d982678406942072f3f77a", kill_on_drop: false }`
[INFO] [stdout] 817e571a296202eab5aa90816e956a057d393ff580d982678406942072f3f77a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c3f3a883faebcc997af051f2b6766847b43ecec9002bfa5038daf093dd197591
[INFO] running `Command { std: "docker" "start" "-a" "c3f3a883faebcc997af051f2b6766847b43ecec9002bfa5038daf093dd197591", kill_on_drop: false }`
[INFO] [stderr]     Checking aoc2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `SeekFrom`, `Seek`
[INFO] [stdout]  --> src/day1/main.rs:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{BufRead, BufReader, Seek, SeekFrom, Read};
[INFO] [stdout]   |                                   ^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day1/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut reader = BufReader::new(f);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day1/main.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let mut reader = BufReader::new(f);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calc`
[INFO] [stdout]   --> src/day1/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn calc() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SeekFrom`, `Seek`
[INFO] [stdout]  --> src/day1/main.rs:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{BufRead, BufReader, Seek, SeekFrom, Read};
[INFO] [stdout]   |                                   ^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day1/main.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut reader = BufReader::new(f);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day1/main.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let mut reader = BufReader::new(f);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calc`
[INFO] [stdout]   --> src/day1/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn calc() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "c3f3a883faebcc997af051f2b6766847b43ecec9002bfa5038daf093dd197591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3f3a883faebcc997af051f2b6766847b43ecec9002bfa5038daf093dd197591", kill_on_drop: false }`
[INFO] [stdout] c3f3a883faebcc997af051f2b6766847b43ecec9002bfa5038daf093dd197591