[INFO] cloning repository https://github.com/moonman369/Rust-Tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/moonman369/Rust-Tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmoonman369%2FRust-Tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmoonman369%2FRust-Tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b008795a9c0c7c9887f8b87532b31bce4f269440
[INFO] checking moonman369/Rust-Tutorial against master#6a9758d4f38d4763bd437c48fa7e5246cecf8d04 for pr-124355
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmoonman369%2FRust-Tutorial" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/moonman369/Rust-Tutorial on toolchain 6a9758d4f38d4763bd437c48fa7e5246cecf8d04
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a9758d4f38d4763bd437c48fa7e5246cecf8d04" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/moonman369/Rust-Tutorial
[INFO] finished tweaking git repo https://github.com/moonman369/Rust-Tutorial
[INFO] tweaked toml for git repo https://github.com/moonman369/Rust-Tutorial written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/moonman369/Rust-Tutorial 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" "+6a9758d4f38d4763bd437c48fa7e5246cecf8d04" "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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+6a9758d4f38d4763bd437c48fa7e5246cecf8d04" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b85bbc65f135145778bbfd78baea29d19c5c7ed1ed84d4aeaf1f2b84565bb0f8
[INFO] running `Command { std: "docker" "start" "-a" "b85bbc65f135145778bbfd78baea29d19c5c7ed1ed84d4aeaf1f2b84565bb0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b85bbc65f135145778bbfd78baea29d19c5c7ed1ed84d4aeaf1f2b84565bb0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b85bbc65f135145778bbfd78baea29d19c5c7ed1ed84d4aeaf1f2b84565bb0f8", kill_on_drop: false }`
[INFO] [stdout] b85bbc65f135145778bbfd78baea29d19c5c7ed1ed84d4aeaf1f2b84565bb0f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+6a9758d4f38d4763bd437c48fa7e5246cecf8d04" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab2ff3e3da089a6f75d71f78759e90201673b8af63a8a46f3e9c42ee5d4dde1b
[INFO] running `Command { std: "docker" "start" "-a" "ab2ff3e3da089a6f75d71f78759e90201673b8af63a8a46f3e9c42ee5d4dde1b", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]  --> src/main.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut a: i32 = 10;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]  --> src/main.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut a: i32 = 10;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` 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` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "ab2ff3e3da089a6f75d71f78759e90201673b8af63a8a46f3e9c42ee5d4dde1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab2ff3e3da089a6f75d71f78759e90201673b8af63a8a46f3e9c42ee5d4dde1b", kill_on_drop: false }`
[INFO] [stdout] ab2ff3e3da089a6f75d71f78759e90201673b8af63a8a46f3e9c42ee5d4dde1b