[INFO] cloning repository https://github.com/vladborsh/rs-calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vladborsh/rs-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvladborsh%2Frs-calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvladborsh%2Frs-calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 569ebba7c3e8113a41072665288851b45a256685
[INFO] checking vladborsh/rs-calculator against master#9748d87dc70a9a6725c5dbd76ce29d04752b4f90 for pr-144156
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvladborsh%2Frs-calculator" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vladborsh/rs-calculator
[INFO] finished tweaking git repo https://github.com/vladborsh/rs-calculator
[INFO] tweaked toml for git repo https://github.com/vladborsh/rs-calculator written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vladborsh/rs-calculator on toolchain 9748d87dc70a9a6725c5dbd76ce29d04752b4f90
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vladborsh/rs-calculator 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" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98bb5f445a30591fee9f6052192a4fa7455da43ced62f24034a248a3e9f0ac27
[INFO] running `Command { std: "docker" "start" "-a" "98bb5f445a30591fee9f6052192a4fa7455da43ced62f24034a248a3e9f0ac27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98bb5f445a30591fee9f6052192a4fa7455da43ced62f24034a248a3e9f0ac27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98bb5f445a30591fee9f6052192a4fa7455da43ced62f24034a248a3e9f0ac27", kill_on_drop: false }`
[INFO] [stdout] 98bb5f445a30591fee9f6052192a4fa7455da43ced62f24034a248a3e9f0ac27
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d5a12387cad5ce66d159884ed79db6880c8f857f21d840d29e28160519f51f0
[INFO] running `Command { std: "docker" "start" "-a" "0d5a12387cad5ce66d159884ed79db6880c8f857f21d840d29e28160519f51f0", kill_on_drop: false }`
[INFO] [stderr]     Checking calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `cursor` is never used
[INFO] [stdout]   --> src/stack.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl <T>Stack<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn cursor(&self) -> Cursor<'_, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cursor` is never constructed
[INFO] [stdout]   --> src/stack.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct Cursor<'s, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek` and `advance` are never used
[INFO] [stdout]   --> src/stack.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl <'a, T> Cursor<'a, T> {
[INFO] [stdout]    | -------------------------- methods in this implementation
[INFO] [stdout] 48 |     pub fn peek(&self) -> Option<&'a T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn advance(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cursor` is never used
[INFO] [stdout]   --> src/stack.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl <T>Stack<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn cursor(&self) -> Cursor<'_, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cursor` is never constructed
[INFO] [stdout]   --> src/stack.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct Cursor<'s, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek` and `advance` are never used
[INFO] [stdout]   --> src/stack.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl <'a, T> Cursor<'a, T> {
[INFO] [stdout]    | -------------------------- methods in this implementation
[INFO] [stdout] 48 |     pub fn peek(&self) -> Option<&'a T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn advance(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "0d5a12387cad5ce66d159884ed79db6880c8f857f21d840d29e28160519f51f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d5a12387cad5ce66d159884ed79db6880c8f857f21d840d29e28160519f51f0", kill_on_drop: false }`
[INFO] [stdout] 0d5a12387cad5ce66d159884ed79db6880c8f857f21d840d29e28160519f51f0