[INFO] cloning repository https://github.com/mischkew/adventofcode2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mischkew/adventofcode2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmischkew%2Fadventofcode2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmischkew%2Fadventofcode2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce4cf701b4d2c0a5269f1829143d0592d1cd3702
[INFO] checking mischkew/adventofcode2019 against master#4c60a0ea5b2385d7400df9db1ad04e96f2a4c154 for 92191_revert
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmischkew%2Fadventofcode2019" "/workspace/builds/worker-109/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-109/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mischkew/adventofcode2019 on toolchain 4c60a0ea5b2385d7400df9db1ad04e96f2a4c154
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4c60a0ea5b2385d7400df9db1ad04e96f2a4c154" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mischkew/adventofcode2019
[INFO] finished tweaking git repo https://github.com/mischkew/adventofcode2019
[INFO] tweaked toml for git repo https://github.com/mischkew/adventofcode2019 written to /workspace/builds/worker-109/source/Cargo.toml
[INFO] crate git repo https://github.com/mischkew/adventofcode2019 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4c60a0ea5b2385d7400df9db1ad04e96f2a4c154" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded permutohedron v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+4c60a0ea5b2385d7400df9db1ad04e96f2a4c154" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 468b5e234fff27f4a6e1b2e11c8fb132f70589f5249e477de3c0c3a95ec67e09
[INFO] running `Command { std: "docker" "start" "-a" "468b5e234fff27f4a6e1b2e11c8fb132f70589f5249e477de3c0c3a95ec67e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "468b5e234fff27f4a6e1b2e11c8fb132f70589f5249e477de3c0c3a95ec67e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468b5e234fff27f4a6e1b2e11c8fb132f70589f5249e477de3c0c3a95ec67e09", kill_on_drop: false }`
[INFO] [stdout] 468b5e234fff27f4a6e1b2e11c8fb132f70589f5249e477de3c0c3a95ec67e09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+4c60a0ea5b2385d7400df9db1ad04e96f2a4c154" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca2e1fa4860de085ccfe18e66efb50a63db8aebb1374616bbf6914adc93934b7
[INFO] running `Command { std: "docker" "start" "-a" "ca2e1fa4860de085ccfe18e66efb50a63db8aebb1374616bbf6914adc93934b7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking adventofcode2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/day06.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let mut B = Object::empty("B");
[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 `COM` should have a snake case name
[INFO] [stdout]    --> src/bin/day06.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let COM = Object::empty("COM");
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `com`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `B` should have a snake case name
[INFO] [stdout]    --> src/bin/day06.rs:158:17
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let mut B = Object::empty("B");
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case: `b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "ca2e1fa4860de085ccfe18e66efb50a63db8aebb1374616bbf6914adc93934b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca2e1fa4860de085ccfe18e66efb50a63db8aebb1374616bbf6914adc93934b7", kill_on_drop: false }`
[INFO] [stdout] ca2e1fa4860de085ccfe18e66efb50a63db8aebb1374616bbf6914adc93934b7