[INFO] cloning repository https://github.com/lreynolds18/AOC
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lreynolds18/AOC" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flreynolds18%2FAOC", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flreynolds18%2FAOC'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 441e7b46e56d9b506c2bd51c0c5848efb457d2fe
[INFO] checking lreynolds18/AOC against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flreynolds18%2FAOC" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lreynolds18/AOC on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lreynolds18/AOC
[INFO] finished tweaking git repo https://github.com/lreynolds18/AOC
[INFO] tweaked toml for git repo https://github.com/lreynolds18/AOC written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/lreynolds18/AOC already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 010bb2b828e7383bbc38d1c540f03e620e21cb8dc628938c5e26b2fa23b9d3e4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "010bb2b828e7383bbc38d1c540f03e620e21cb8dc628938c5e26b2fa23b9d3e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "010bb2b828e7383bbc38d1c540f03e620e21cb8dc628938c5e26b2fa23b9d3e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "010bb2b828e7383bbc38d1c540f03e620e21cb8dc628938c5e26b2fa23b9d3e4", kill_on_drop: false }`
[INFO] [stdout] 010bb2b828e7383bbc38d1c540f03e620e21cb8dc628938c5e26b2fa23b9d3e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 414a3447ec60b3e6d50ae8e06b7e496c36bf435a9dd0e66744ae8e2ccffc2272
[INFO] running `Command { std: "docker" "start" "-a" "414a3447ec60b3e6d50ae8e06b7e496c36bf435a9dd0e66744ae8e2ccffc2272", kill_on_drop: false }`
[INFO] [stderr]     Checking aoc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/code/helper.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut id: i32 = split_by_whitespace[0]
[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/code/day02.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let mut diff = difference_between_two_strings(&line1, &line2);
[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/code/helper.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut id: i32 = split_by_whitespace[0]
[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/code/day02.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let mut diff = difference_between_two_strings(&line1, &line2);
[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/code/day05.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[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/code/day05.rs:26:7
[INFO] [stdout]    |
[INFO] [stdout] 26 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[INFO] [stdout]    |       ----^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/code/day05.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[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/code/day05.rs:26:7
[INFO] [stdout]    |
[INFO] [stdout] 26 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[INFO] [stdout]    |       ----^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "414a3447ec60b3e6d50ae8e06b7e496c36bf435a9dd0e66744ae8e2ccffc2272", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "414a3447ec60b3e6d50ae8e06b7e496c36bf435a9dd0e66744ae8e2ccffc2272", kill_on_drop: false }`
[INFO] [stdout] 414a3447ec60b3e6d50ae8e06b7e496c36bf435a9dd0e66744ae8e2ccffc2272