[INFO] cloning repository https://github.com/estebanpablo89/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/estebanpablo89/rust_traits" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Festebanpablo89%2Frust_traits", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Festebanpablo89%2Frust_traits'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 008ada491ddc31473124d863e6051ffb2e7d7bfb
[INFO] checking estebanpablo89/rust_traits against master#db0e836148accac8a22532e3596ac612b63c2d8e for pr-139272
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Festebanpablo89%2Frust_traits" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/estebanpablo89/rust_traits on toolchain db0e836148accac8a22532e3596ac612b63c2d8e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/estebanpablo89/rust_traits
[INFO] finished tweaking git repo https://github.com/estebanpablo89/rust_traits
[INFO] tweaked toml for git repo https://github.com/estebanpablo89/rust_traits written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/estebanpablo89/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" "+db0e836148accac8a22532e3596ac612b63c2d8e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8b07bd74baf0469fa1d004c24c6ce0bc9701ba569e456411cf5082bccc16fa7
[INFO] running `Command { std: "docker" "start" "-a" "a8b07bd74baf0469fa1d004c24c6ce0bc9701ba569e456411cf5082bccc16fa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8b07bd74baf0469fa1d004c24c6ce0bc9701ba569e456411cf5082bccc16fa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8b07bd74baf0469fa1d004c24c6ce0bc9701ba569e456411cf5082bccc16fa7", kill_on_drop: false }`
[INFO] [stdout] a8b07bd74baf0469fa1d004c24c6ce0bc9701ba569e456411cf5082bccc16fa7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f077897aa01861c38856a649a4049532a6be82e8925e7ec6dc6ee6de1b9eb13
[INFO] running `Command { std: "docker" "start" "-a" "6f077897aa01861c38856a649a4049532a6be82e8925e7ec6dc6ee6de1b9eb13", kill_on_drop: false }`
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `b2`
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let b2 = Basket::new(23);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_b2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b3`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let b3 = Basket::new(true);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_b3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let s2 = Stack::new(vec![23]);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let s3 = Stack::new(vec![true]);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[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: unused variable: `b2`
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let b2 = Basket::new(23);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_b2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b3`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let b3 = Basket::new(true);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_b3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let s2 = Stack::new(vec![23]);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let s3 = Stack::new(vec![true]);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[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 0.10s
[INFO] running `Command { std: "docker" "inspect" "6f077897aa01861c38856a649a4049532a6be82e8925e7ec6dc6ee6de1b9eb13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f077897aa01861c38856a649a4049532a6be82e8925e7ec6dc6ee6de1b9eb13", kill_on_drop: false }`
[INFO] [stdout] 6f077897aa01861c38856a649a4049532a6be82e8925e7ec6dc6ee6de1b9eb13