[INFO] cloning repository https://github.com/Askadar/rust-cs-basics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Askadar/rust-cs-basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskadar%2Frust-cs-basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskadar%2Frust-cs-basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47a69105ea29bc7982f25bdf9a1e396689f20547
[INFO] checking Askadar/rust-cs-basics against master#36b21637e93b038453924d3c66821089e71d8baa for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskadar%2Frust-cs-basics" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Askadar/rust-cs-basics
[INFO] finished tweaking git repo https://github.com/Askadar/rust-cs-basics
[INFO] tweaked toml for git repo https://github.com/Askadar/rust-cs-basics written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Askadar/rust-cs-basics on toolchain 36b21637e93b038453924d3c66821089e71d8baa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Askadar/rust-cs-basics 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" "+36b21637e93b038453924d3c66821089e71d8baa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41d4df22d40a054789d4dafa5460bdc43827778c4ffeaf9a40545fc1f6e65fef
[INFO] running `Command { std: "docker" "start" "-a" "41d4df22d40a054789d4dafa5460bdc43827778c4ffeaf9a40545fc1f6e65fef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41d4df22d40a054789d4dafa5460bdc43827778c4ffeaf9a40545fc1f6e65fef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41d4df22d40a054789d4dafa5460bdc43827778c4ffeaf9a40545fc1f6e65fef", kill_on_drop: false }`
[INFO] [stdout] 41d4df22d40a054789d4dafa5460bdc43827778c4ffeaf9a40545fc1f6e65fef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+36b21637e93b038453924d3c66821089e71d8baa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efa3d079abddaf7245df539dc5e9f1ed1b101b70a00fb5c86a19d36bb62012ca
[INFO] running `Command { std: "docker" "start" "-a" "efa3d079abddaf7245df539dc5e9f1ed1b101b70a00fb5c86a19d36bb62012ca", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-cs-basics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `StackNodeRef` is never used
[INFO] [stdout]  --> src/stack.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | type StackNodeRef<T> = Option<Box<StackNode<T>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StackNode` is never constructed
[INFO] [stdout]  --> src/stack.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct StackNode<T> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Stack` is never constructed
[INFO] [stdout]  --> src/stack.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Stack<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `pop`, and `peek` are never used
[INFO] [stdout]   --> src/stack.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> Stack<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 14 |     pub fn new(value: Option<T>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn push(&mut self, value: T) -> &Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "efa3d079abddaf7245df539dc5e9f1ed1b101b70a00fb5c86a19d36bb62012ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efa3d079abddaf7245df539dc5e9f1ed1b101b70a00fb5c86a19d36bb62012ca", kill_on_drop: false }`
[INFO] [stdout] efa3d079abddaf7245df539dc5e9f1ed1b101b70a00fb5c86a19d36bb62012ca
