[INFO] cloning repository https://github.com/ziukristian/RustBookProjects
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ziukristian/RustBookProjects" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fziukristian%2FRustBookProjects", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fziukristian%2FRustBookProjects'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64e522181488f0adb04cae2b44fa2d28b24d24a7
[INFO] checking ziukristian/RustBookProjects against try#fceb2de603f0807f9049222f3f612ed51ed8f9dc for pr-157576
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fziukristian%2FRustBookProjects" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ziukristian/RustBookProjects
[INFO] finished tweaking git repo https://github.com/ziukristian/RustBookProjects
[INFO] tweaked toml for git repo https://github.com/ziukristian/RustBookProjects written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ziukristian/RustBookProjects on toolchain fceb2de603f0807f9049222f3f612ed51ed8f9dc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fceb2de603f0807f9049222f3f612ed51ed8f9dc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ziukristian/RustBookProjects 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" "+fceb2de603f0807f9049222f3f612ed51ed8f9dc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00
[INFO] running `Command { std: "docker" "start" "8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00" "/opt/rustwide/cargo-home/bin/cargo" "+fceb2de603f0807f9049222f3f612ed51ed8f9dc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00" "/opt/rustwide/cargo-home/bin/cargo" "+fceb2de603f0807f9049222f3f612ed51ed8f9dc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.162
[INFO] [stderr]     Checking structs v0.1.0 (/opt/rustwide/workdir/structs)
[INFO] [stderr]     Checking variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]     Checking hello_cargo v0.1.0 (/opt/rustwide/workdir/hello_cargo)
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> structs/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut user1 = build_user(String::from("ziukristian@gmail.com"), String::from("Kristian"));
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `email`, `sign_in_count`, and `active` are never read
[INFO] [stdout]  --> structs/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 2 |     username: String,
[INFO] [stdout] 3 |     email: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 5 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> structs/src/main.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     struct Color(i32, i32, i32);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> structs/src/main.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     struct Point(i32, i32, i32);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> structs/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut user1 = build_user(String::from("ziukristian@gmail.com"), String::from("Kristian"));
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `email`, `sign_in_count`, and `active` are never read
[INFO] [stdout]  --> structs/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 2 |     username: String,
[INFO] [stdout] 3 |     email: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 5 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.16s
[INFO] running `Command { std: "docker" "inspect" "8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00", kill_on_drop: false }`
[INFO] [stdout] 8f4855430254d46cd641d860966db0c6a374d2f025601e0800d4e5e972ab3a00
