[INFO] cloning repository https://github.com/adam-mcdaniel/parkinglot-generator-optimizer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adam-mcdaniel/parkinglot-generator-optimizer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadam-mcdaniel%2Fparkinglot-generator-optimizer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadam-mcdaniel%2Fparkinglot-generator-optimizer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac4391480658f0bba08eb343db1a6cf963298e59
[INFO] checking adam-mcdaniel/parkinglot-generator-optimizer against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadam-mcdaniel%2Fparkinglot-generator-optimizer" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/adam-mcdaniel/parkinglot-generator-optimizer on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/adam-mcdaniel/parkinglot-generator-optimizer
[INFO] finished tweaking git repo https://github.com/adam-mcdaniel/parkinglot-generator-optimizer
[INFO] tweaked toml for git repo https://github.com/adam-mcdaniel/parkinglot-generator-optimizer written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/adam-mcdaniel/parkinglot-generator-optimizer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 827a1aa1f794660baef4f4e88258308967f73c3c2ddc6bd278332744b311b7c1
[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" "827a1aa1f794660baef4f4e88258308967f73c3c2ddc6bd278332744b311b7c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "827a1aa1f794660baef4f4e88258308967f73c3c2ddc6bd278332744b311b7c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "827a1aa1f794660baef4f4e88258308967f73c3c2ddc6bd278332744b311b7c1", kill_on_drop: false }`
[INFO] [stdout] 827a1aa1f794660baef4f4e88258308967f73c3c2ddc6bd278332744b311b7c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b2411526e86f783bd2bebbc2d4179b871c73b7584c4efb7fbb085ade971d27c
[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" "7b2411526e86f783bd2bebbc2d4179b871c73b7584c4efb7fbb085ade971d27c", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking indexmap v1.0.2
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking pathfinding v1.0.3
[INFO] [stderr]     Checking parking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut lot = t.join().unwrap();
[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/main.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut lot = t.join().unwrap();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.57s
[INFO] running `Command { std: "docker" "inspect" "7b2411526e86f783bd2bebbc2d4179b871c73b7584c4efb7fbb085ade971d27c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b2411526e86f783bd2bebbc2d4179b871c73b7584c4efb7fbb085ade971d27c", kill_on_drop: false }`
[INFO] [stdout] 7b2411526e86f783bd2bebbc2d4179b871c73b7584c4efb7fbb085ade971d27c