[INFO] cloning repository https://github.com/h0gan1ee/rusty-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/h0gan1ee/rusty-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh0gan1ee%2Frusty-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh0gan1ee%2Frusty-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97d2344cbba0ae2a95656f8013e0240071d393e8
[INFO] testing h0gan1ee/rusty-tree against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh0gan1ee%2Frusty-tree" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/h0gan1ee/rusty-tree on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/h0gan1ee/rusty-tree
[INFO] finished tweaking git repo https://github.com/h0gan1ee/rusty-tree
[INFO] tweaked toml for git repo https://github.com/h0gan1ee/rusty-tree written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/h0gan1ee/rusty-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63705c0678c6075122a1faeea583b98150cf60bc8df3446e59d1c14f1245d547
[INFO] running `Command { std: "docker" "start" "-a" "63705c0678c6075122a1faeea583b98150cf60bc8df3446e59d1c14f1245d547", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63705c0678c6075122a1faeea583b98150cf60bc8df3446e59d1c14f1245d547", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63705c0678c6075122a1faeea583b98150cf60bc8df3446e59d1c14f1245d547", kill_on_drop: false }`
[INFO] [stdout] 63705c0678c6075122a1faeea583b98150cf60bc8df3446e59d1c14f1245d547
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f0d5c7873cf958724159565201f34936b1edd34826c45f5e7c2d2495b1ee582
[INFO] running `Command { std: "docker" "start" "-a" "7f0d5c7873cf958724159565201f34936b1edd34826c45f5e7c2d2495b1ee582", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling structopt v0.3.22
[INFO] [stderr]    Compiling rusty-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `root_node`
[INFO] [stdout]   --> src/tree.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn root_node(&self) -> &Node {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn new() -> Node {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.37s
[INFO] running `Command { std: "docker" "inspect" "7f0d5c7873cf958724159565201f34936b1edd34826c45f5e7c2d2495b1ee582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f0d5c7873cf958724159565201f34936b1edd34826c45f5e7c2d2495b1ee582", kill_on_drop: false }`
[INFO] [stdout] 7f0d5c7873cf958724159565201f34936b1edd34826c45f5e7c2d2495b1ee582
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f301626ee96438df98dc75f110a299d0273c500c114405db6447517fb72425e
[INFO] running `Command { std: "docker" "start" "-a" "0f301626ee96438df98dc75f110a299d0273c500c114405db6447517fb72425e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `root_node`
[INFO] [stdout]   --> src/tree.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn root_node(&self) -> &Node {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn new() -> Node {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "0f301626ee96438df98dc75f110a299d0273c500c114405db6447517fb72425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f301626ee96438df98dc75f110a299d0273c500c114405db6447517fb72425e", kill_on_drop: false }`
[INFO] [stdout] 0f301626ee96438df98dc75f110a299d0273c500c114405db6447517fb72425e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7f82f781508ff5cc100a0815fa8baa46e213aaf3bbaed5070f1b8f6d5f04bdb7
[INFO] running `Command { std: "docker" "start" "-a" "7f82f781508ff5cc100a0815fa8baa46e213aaf3bbaed5070f1b8f6d5f04bdb7", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `root_node`
[INFO] [stderr]   --> src/tree.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn root_node(&self) -> &Node {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/tree.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn new() -> Node {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-tree` (bin "rusty-tree" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rusty_tree-8d599ec32955a230)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7f82f781508ff5cc100a0815fa8baa46e213aaf3bbaed5070f1b8f6d5f04bdb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f82f781508ff5cc100a0815fa8baa46e213aaf3bbaed5070f1b8f6d5f04bdb7", kill_on_drop: false }`
[INFO] [stdout] 7f82f781508ff5cc100a0815fa8baa46e213aaf3bbaed5070f1b8f6d5f04bdb7