[INFO] cloning repository https://github.com/ypathak1/Facebook-6-Degrees-of-Separation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ypathak1/Facebook-6-Degrees-of-Separation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fypathak1%2FFacebook-6-Degrees-of-Separation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fypathak1%2FFacebook-6-Degrees-of-Separation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5050f1d1bb7f9c3e9a4ee369b466abc82c2f96d6
[INFO] checking ypathak1/Facebook-6-Degrees-of-Separation against master#a26e97be8826d408309fffbd8168362365719f50 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fypathak1%2FFacebook-6-Degrees-of-Separation" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ypathak1/Facebook-6-Degrees-of-Separation on toolchain a26e97be8826d408309fffbd8168362365719f50
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ypathak1/Facebook-6-Degrees-of-Separation
[INFO] finished tweaking git repo https://github.com/ypathak1/Facebook-6-Degrees-of-Separation
[INFO] tweaked toml for git repo https://github.com/ypathak1/Facebook-6-Degrees-of-Separation written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ypathak1/Facebook-6-Degrees-of-Separation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "fetch" "--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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61b6578f7e66bdbc1eb6ce592117bf8ba753247a70acfcdbb0be77d123f5de76
[INFO] running `Command { std: "docker" "start" "-a" "61b6578f7e66bdbc1eb6ce592117bf8ba753247a70acfcdbb0be77d123f5de76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61b6578f7e66bdbc1eb6ce592117bf8ba753247a70acfcdbb0be77d123f5de76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61b6578f7e66bdbc1eb6ce592117bf8ba753247a70acfcdbb0be77d123f5de76", kill_on_drop: false }`
[INFO] [stdout] 61b6578f7e66bdbc1eb6ce592117bf8ba753247a70acfcdbb0be77d123f5de76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c875c139c7e8d41f2c6e00a2134e2f186e78a0d579735f9a29afeef220bb94a
[INFO] running `Command { std: "docker" "start" "-a" "0c875c139c7e8d41f2c6e00a2134e2f186e78a0d579735f9a29afeef220bb94a", kill_on_drop: false }`
[INFO] [stderr]     Checking Project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/bfs.rs:4:28
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::collections::{HashSet, VecDeque};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/bfs.rs:4:28
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::collections::{HashSet, VecDeque};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_index`
[INFO] [stdout]   --> src/processor.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 let node_index = nodes.iter().position(|n| n == &node).unwrap();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_node_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_index`
[INFO] [stdout]   --> src/processor.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 let node_index = nodes.iter().position(|n| n == &node).unwrap();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_node_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "0c875c139c7e8d41f2c6e00a2134e2f186e78a0d579735f9a29afeef220bb94a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c875c139c7e8d41f2c6e00a2134e2f186e78a0d579735f9a29afeef220bb94a", kill_on_drop: false }`
[INFO] [stdout] 0c875c139c7e8d41f2c6e00a2134e2f186e78a0d579735f9a29afeef220bb94a