[INFO] cloning repository https://github.com/Xannden/synacor-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Xannden/synacor-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXannden%2Fsynacor-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXannden%2Fsynacor-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 27b3502fc4d6c6cf7bd8ffb528fe83b982ccce43
[INFO] checking Xannden/synacor-challenge against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXannden%2Fsynacor-challenge" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Xannden/synacor-challenge on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Xannden/synacor-challenge
[INFO] finished tweaking git repo https://github.com/Xannden/synacor-challenge
[INFO] tweaked toml for git repo https://github.com/Xannden/synacor-challenge written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Xannden/synacor-challenge already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52cbb29e9d18d3738b57f651e7b9414c59758f8475d3a740ab6e53e8a35e7db6
[INFO] running `Command { std: "docker" "start" "-a" "52cbb29e9d18d3738b57f651e7b9414c59758f8475d3a740ab6e53e8a35e7db6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52cbb29e9d18d3738b57f651e7b9414c59758f8475d3a740ab6e53e8a35e7db6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52cbb29e9d18d3738b57f651e7b9414c59758f8475d3a740ab6e53e8a35e7db6", kill_on_drop: false }`
[INFO] [stdout] 52cbb29e9d18d3738b57f651e7b9414c59758f8475d3a740ab6e53e8a35e7db6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9119c4c6ded45626d8211d9fbdeaf4dfbd8c8f0945389b26ab798312f57b7037
[INFO] running `Command { std: "docker" "start" "-a" "9119c4c6ded45626d8211d9fbdeaf4dfbd8c8f0945389b26ab798312f57b7037", kill_on_drop: false }`
[INFO] [stderr]     Checking synacor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, io::Write};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs::File`
[INFO] [stdout]  --> src/main.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{collections::VecDeque, fs::File};
[INFO] [stdout]   |                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, io::Write};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs::File`
[INFO] [stdout]  --> src/main.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{collections::VecDeque, fs::File};
[INFO] [stdout]   |                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "9119c4c6ded45626d8211d9fbdeaf4dfbd8c8f0945389b26ab798312f57b7037", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9119c4c6ded45626d8211d9fbdeaf4dfbd8c8f0945389b26ab798312f57b7037", kill_on_drop: false }`
[INFO] [stdout] 9119c4c6ded45626d8211d9fbdeaf4dfbd8c8f0945389b26ab798312f57b7037