[INFO] cloning repository https://github.com/raimon49/rust-enum-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raimon49/rust-enum-study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraimon49%2Frust-enum-study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraimon49%2Frust-enum-study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73290af6ba7fd0759926f3f38521fcf597181e6e
[INFO] checking raimon49/rust-enum-study against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraimon49%2Frust-enum-study" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raimon49/rust-enum-study on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/raimon49/rust-enum-study
[INFO] finished tweaking git repo https://github.com/raimon49/rust-enum-study
[INFO] tweaked toml for git repo https://github.com/raimon49/rust-enum-study written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/raimon49/rust-enum-study already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a00772d173859f34a23764b042464140c420855fcc96f9666303213dea781076
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a00772d173859f34a23764b042464140c420855fcc96f9666303213dea781076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a00772d173859f34a23764b042464140c420855fcc96f9666303213dea781076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a00772d173859f34a23764b042464140c420855fcc96f9666303213dea781076", kill_on_drop: false }`
[INFO] [stdout] a00772d173859f34a23764b042464140c420855fcc96f9666303213dea781076
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfb3bbe29376391cfa2e9823de0fff5d71e2e03bfc87ee38aadd64b06ff0880c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bfb3bbe29376391cfa2e9823de0fff5d71e2e03bfc87ee38aadd64b06ff0880c", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-enum-study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum is never used: `Json`
[INFO] [stdout]   --> src/main.rs:91:6
[INFO] [stdout]    |
[INFO] [stdout] 91 | enum Json {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `element`
[INFO] [stdout]    --> src/main.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     element: T,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `left`
[INFO] [stdout]    --> src/main.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     left: BinaryTree<T>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `right`
[INFO] [stdout]    --> src/main.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 |     right: BinaryTree<T>
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Json`
[INFO] [stdout]   --> src/main.rs:91:6
[INFO] [stdout]    |
[INFO] [stdout] 91 | enum Json {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `element`
[INFO] [stdout]    --> src/main.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     element: T,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `left`
[INFO] [stdout]    --> src/main.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     left: BinaryTree<T>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `right`
[INFO] [stdout]    --> src/main.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 |     right: BinaryTree<T>
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "bfb3bbe29376391cfa2e9823de0fff5d71e2e03bfc87ee38aadd64b06ff0880c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfb3bbe29376391cfa2e9823de0fff5d71e2e03bfc87ee38aadd64b06ff0880c", kill_on_drop: false }`
[INFO] [stdout] bfb3bbe29376391cfa2e9823de0fff5d71e2e03bfc87ee38aadd64b06ff0880c