[INFO] cloning repository https://github.com/YasyaKarasu/RustHW2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/YasyaKarasu/RustHW2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYasyaKarasu%2FRustHW2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYasyaKarasu%2FRustHW2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 383d07d109c0ce1f036d8992e7d6d53e1fbbb02a
[INFO] checking YasyaKarasu/RustHW2 against try#3652eaba14e5de752eaa5a8ffcac7132f9244f07 for pr-139272
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYasyaKarasu%2FRustHW2" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/YasyaKarasu/RustHW2 on toolchain 3652eaba14e5de752eaa5a8ffcac7132f9244f07
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3652eaba14e5de752eaa5a8ffcac7132f9244f07" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/YasyaKarasu/RustHW2
[INFO] finished tweaking git repo https://github.com/YasyaKarasu/RustHW2
[INFO] tweaked toml for git repo https://github.com/YasyaKarasu/RustHW2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/YasyaKarasu/RustHW2 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" "+3652eaba14e5de752eaa5a8ffcac7132f9244f07" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3652eaba14e5de752eaa5a8ffcac7132f9244f07" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c97529c7e8b33cc5b3318193754c2a58420ec9361e7d286920d8e9e84a79986
[INFO] running `Command { std: "docker" "start" "-a" "8c97529c7e8b33cc5b3318193754c2a58420ec9361e7d286920d8e9e84a79986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c97529c7e8b33cc5b3318193754c2a58420ec9361e7d286920d8e9e84a79986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c97529c7e8b33cc5b3318193754c2a58420ec9361e7d286920d8e9e84a79986", kill_on_drop: false }`
[INFO] [stdout] 8c97529c7e8b33cc5b3318193754c2a58420ec9361e7d286920d8e9e84a79986
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3652eaba14e5de752eaa5a8ffcac7132f9244f07" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58067e268e5cc84d97c53e97b048e84f3ad08a8111433a98b5c9d17315772cc5
[INFO] running `Command { std: "docker" "start" "-a" "58067e268e5cc84d97c53e97b048e84f3ad08a8111433a98b5c9d17315772cc5", kill_on_drop: false }`
[INFO] [stderr]     Checking lecture2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Buffer` is never constructed
[INFO] [stdout]  --> src/buffer.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Buffer<T> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `sum` are never used
[INFO] [stdout]   --> src/buffer.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl<T: Default + Copy + std::ops::AddAssign> Buffer<T> {
[INFO] [stdout]    | ------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 6  |     pub fn new(data: Vec<T>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub fn sum(&self) -> T {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare_string` is never used
[INFO] [stdout]  --> src/string.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn compare_string(x: &str, y: &str) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `self_increment` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn self_increment(v: &Vec<char>) -> Vec<char> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "58067e268e5cc84d97c53e97b048e84f3ad08a8111433a98b5c9d17315772cc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58067e268e5cc84d97c53e97b048e84f3ad08a8111433a98b5c9d17315772cc5", kill_on_drop: false }`
[INFO] [stdout] 58067e268e5cc84d97c53e97b048e84f3ad08a8111433a98b5c9d17315772cc5