[INFO] cloning repository https://github.com/wujekbizon/rust-traits
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wujekbizon/rust-traits" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwujekbizon%2Frust-traits", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwujekbizon%2Frust-traits'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee84fdc1b905f6a6f1cfb40013e43b45a065eaaf
[INFO] checking wujekbizon/rust-traits against master#4ecd70ddd1039a3954056c1071e40278048476fa for pr-137633
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwujekbizon%2Frust-traits" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wujekbizon/rust-traits on toolchain 4ecd70ddd1039a3954056c1071e40278048476fa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wujekbizon/rust-traits
[INFO] finished tweaking git repo https://github.com/wujekbizon/rust-traits
[INFO] tweaked toml for git repo https://github.com/wujekbizon/rust-traits written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wujekbizon/rust-traits 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" "+4ecd70ddd1039a3954056c1071e40278048476fa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 649ff24862de535d2b459b463182e241d6251e1ec7faa25fdf4351ddd8604ab4
[INFO] running `Command { std: "docker" "start" "-a" "649ff24862de535d2b459b463182e241d6251e1ec7faa25fdf4351ddd8604ab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "649ff24862de535d2b459b463182e241d6251e1ec7faa25fdf4351ddd8604ab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "649ff24862de535d2b459b463182e241d6251e1ec7faa25fdf4351ddd8604ab4", kill_on_drop: false }`
[INFO] [stdout] 649ff24862de535d2b459b463182e241d6251e1ec7faa25fdf4351ddd8604ab4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 955f20fd51bfa5c5f1481e1d000eec59dd243c169d4cb2f65e790fa4400aef02
[INFO] running `Command { std: "docker" "start" "-a" "955f20fd51bfa5c5f1481e1d000eec59dd243c169d4cb2f65e790fa4400aef02", kill_on_drop: false }`
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `b3`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let b3 = Basket::new(b2);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_b3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let s1 = Stack::new(vec![b1, b4]);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b3`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let b3 = Basket::new(b2);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_b3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let s1 = Stack::new(vec![b1, b4]);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get` and `is_empty` are never used
[INFO] [stdout]  --> src/container.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Container<T> {
[INFO] [stdout]   |           --------- methods in this trait
[INFO] [stdout] 2 |     fn get(&mut self) -> Option<T>;
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 3 |     fn put(&mut self, item: T);
[INFO] [stdout] 4 |     fn is_empty(&self) -> bool;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get` and `is_empty` are never used
[INFO] [stdout]  --> src/container.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Container<T> {
[INFO] [stdout]   |           --------- methods in this trait
[INFO] [stdout] 2 |     fn get(&mut self) -> Option<T>;
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 3 |     fn put(&mut self, item: T);
[INFO] [stdout] 4 |     fn is_empty(&self) -> bool;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "955f20fd51bfa5c5f1481e1d000eec59dd243c169d4cb2f65e790fa4400aef02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "955f20fd51bfa5c5f1481e1d000eec59dd243c169d4cb2f65e790fa4400aef02", kill_on_drop: false }`
[INFO] [stdout] 955f20fd51bfa5c5f1481e1d000eec59dd243c169d4cb2f65e790fa4400aef02