[INFO] cloning repository https://github.com/mattKipper/advent-2017
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattKipper/advent-2017" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmattKipper%2Fadvent-2017", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmattKipper%2Fadvent-2017'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbbd646af1fac1e41f9117f53341fb585b1c7d0b
[INFO] checking mattKipper/advent-2017 against try#169954edd744527414c631e9af1bbdc537b0cdf2 for pr-75192
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmattKipper%2Fadvent-2017" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mattKipper/advent-2017 on toolchain 169954edd744527414c631e9af1bbdc537b0cdf2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mattKipper/advent-2017
[INFO] finished tweaking git repo https://github.com/mattKipper/advent-2017
[INFO] tweaked toml for git repo https://github.com/mattKipper/advent-2017 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/mattKipper/advent-2017 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e06bbf97ca7d2d27e2bc3d5aba91822b61fbc3dd32076b1fa79f5144944b377
[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" "0e06bbf97ca7d2d27e2bc3d5aba91822b61fbc3dd32076b1fa79f5144944b377", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e06bbf97ca7d2d27e2bc3d5aba91822b61fbc3dd32076b1fa79f5144944b377", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e06bbf97ca7d2d27e2bc3d5aba91822b61fbc3dd32076b1fa79f5144944b377", kill_on_drop: false }`
[INFO] [stdout] 0e06bbf97ca7d2d27e2bc3d5aba91822b61fbc3dd32076b1fa79f5144944b377
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f7ae71a5c38d13c6ef36a23c26bcfe18721741a2019ae6b9e734a31daf0b43c
[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" "5f7ae71a5c38d13c6ef36a23c26bcfe18721741a2019ae6b9e734a31daf0b43c", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.3.18
[INFO] [stderr]     Checking advent-2017 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/08.rs:119:21
[INFO] [stdout]     |
[INFO] [stdout] 119 |         if let Some(mut instruction) = Instruction::<i32>::from_line(&line) {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/08.rs:119:21
[INFO] [stdout]     |
[INFO] [stdout] 119 |         if let Some(mut instruction) = Instruction::<i32>::from_line(&line) {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
[INFO] running `Command { std: "docker" "inspect" "5f7ae71a5c38d13c6ef36a23c26bcfe18721741a2019ae6b9e734a31daf0b43c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f7ae71a5c38d13c6ef36a23c26bcfe18721741a2019ae6b9e734a31daf0b43c", kill_on_drop: false }`
[INFO] [stdout] 5f7ae71a5c38d13c6ef36a23c26bcfe18721741a2019ae6b9e734a31daf0b43c