[INFO] fetching crate jungle 0.1.1...
[INFO] testing jungle-0.1.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate jungle 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate jungle 0.1.1 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jungle 0.1.1
[INFO] finished tweaking crates.io crate jungle 0.1.1
[INFO] tweaked toml for crates.io crate jungle 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded generic-array v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58da8b08b00c1544354b8aa43aa16b8735eae296b6d329b75483bf7952fddd66
[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" "58da8b08b00c1544354b8aa43aa16b8735eae296b6d329b75483bf7952fddd66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58da8b08b00c1544354b8aa43aa16b8735eae296b6d329b75483bf7952fddd66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58da8b08b00c1544354b8aa43aa16b8735eae296b6d329b75483bf7952fddd66", kill_on_drop: false }`
[INFO] [stdout] 58da8b08b00c1544354b8aa43aa16b8735eae296b6d329b75483bf7952fddd66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e086d9bcf0280ae72cdcdfbdcca417ff418167160db1a51240acc28e3573cef7
[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" "e086d9bcf0280ae72cdcdfbdcca417ff418167160db1a51240acc28e3573cef7", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-array v0.5.1
[INFO] [stderr]    Compiling jungle v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/tree.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 |     value: T,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]   --> src/tree.rs:27:2
[INFO] [stdout]    |
[INFO] [stdout] 27 |     parent: NodePointer<T,N>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `children`
[INFO] [stdout]   --> src/tree.rs:28:2
[INFO] [stdout]    |
[INFO] [stdout] 28 |     children: GenericArray<NodePointer<T,N>,N>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn new(value: T) -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Tree`
[INFO] [stdout]   --> src/tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Tree<T,N: ArrayLength<NodePointer<T,N>>>(NodePointer<T,N>);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/tree.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn parent(&mut self) -> bool{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `child`
[INFO] [stdout]   --> src/tree.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn child(&mut self, child: usize) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e086d9bcf0280ae72cdcdfbdcca417ff418167160db1a51240acc28e3573cef7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e086d9bcf0280ae72cdcdfbdcca417ff418167160db1a51240acc28e3573cef7", kill_on_drop: false }`
[INFO] [stdout] e086d9bcf0280ae72cdcdfbdcca417ff418167160db1a51240acc28e3573cef7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16ce45bd292777b1d93ad0a221b762df60dfcc55740a3e5d6c95769ab19f7f06
[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" "16ce45bd292777b1d93ad0a221b762df60dfcc55740a3e5d6c95769ab19f7f06", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/tree.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 |     value: T,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]   --> src/tree.rs:27:2
[INFO] [stdout]    |
[INFO] [stdout] 27 |     parent: NodePointer<T,N>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `children`
[INFO] [stdout]   --> src/tree.rs:28:2
[INFO] [stdout]    |
[INFO] [stdout] 28 |     children: GenericArray<NodePointer<T,N>,N>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn new(value: T) -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Tree`
[INFO] [stdout]   --> src/tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Tree<T,N: ArrayLength<NodePointer<T,N>>>(NodePointer<T,N>);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/tree.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn parent(&mut self) -> bool{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `child`
[INFO] [stdout]   --> src/tree.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn child(&mut self, child: usize) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling jungle v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/tree.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 |     value: T,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parent`
[INFO] [stdout]   --> src/tree.rs:27:2
[INFO] [stdout]    |
[INFO] [stdout] 27 |     parent: NodePointer<T,N>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `children`
[INFO] [stdout]   --> src/tree.rs:28:2
[INFO] [stdout]    |
[INFO] [stdout] 28 |     children: GenericArray<NodePointer<T,N>,N>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn new(value: T) -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Tree`
[INFO] [stdout]   --> src/tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Tree<T,N: ArrayLength<NodePointer<T,N>>>(NodePointer<T,N>);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tree.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/tree.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn parent(&mut self) -> bool{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `child`
[INFO] [stdout]   --> src/tree.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn child(&mut self, child: usize) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "16ce45bd292777b1d93ad0a221b762df60dfcc55740a3e5d6c95769ab19f7f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16ce45bd292777b1d93ad0a221b762df60dfcc55740a3e5d6c95769ab19f7f06", kill_on_drop: false }`
[INFO] [stdout] 16ce45bd292777b1d93ad0a221b762df60dfcc55740a3e5d6c95769ab19f7f06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f3c9c7f6739d44b9712ac9bd52a1a22e5dbe4070c34e9382c095a04d44095604
[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" "f3c9c7f6739d44b9712ac9bd52a1a22e5dbe4070c34e9382c095a04d44095604", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]   --> src/tree.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     value: T,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `parent`
[INFO] [stderr]   --> src/tree.rs:27:2
[INFO] [stderr]    |
[INFO] [stderr] 27 |     parent: NodePointer<T,N>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `children`
[INFO] [stderr]   --> src/tree.rs:28:2
[INFO] [stderr]    |
[INFO] [stderr] 28 |     children: GenericArray<NodePointer<T,N>,N>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/tree.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn new(value: T) -> Self{
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Tree`
[INFO] [stderr]   --> src/tree.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | struct Tree<T,N: ArrayLength<NodePointer<T,N>>>(NodePointer<T,N>);
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/tree.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn new(value: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parent`
[INFO] [stderr]   --> src/tree.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn parent(&mut self) -> bool{
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `child`
[INFO] [stderr]   --> src/tree.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn child(&mut self, child: usize) -> bool {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]   --> src/tree.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     value: T,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `parent`
[INFO] [stderr]   --> src/tree.rs:27:2
[INFO] [stderr]    |
[INFO] [stderr] 27 |     parent: NodePointer<T,N>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `children`
[INFO] [stderr]   --> src/tree.rs:28:2
[INFO] [stderr]    |
[INFO] [stderr] 28 |     children: GenericArray<NodePointer<T,N>,N>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/tree.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn new(value: T) -> Self{
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Tree`
[INFO] [stderr]   --> src/tree.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | struct Tree<T,N: ArrayLength<NodePointer<T,N>>>(NodePointer<T,N>);
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/tree.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn new(value: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parent`
[INFO] [stderr]   --> src/tree.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn parent(&mut self) -> bool{
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `child`
[INFO] [stderr]   --> src/tree.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn child(&mut self, child: usize) -> bool {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/jungle-3c4b742490c5f79c
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests jungle
[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" "f3c9c7f6739d44b9712ac9bd52a1a22e5dbe4070c34e9382c095a04d44095604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3c9c7f6739d44b9712ac9bd52a1a22e5dbe4070c34e9382c095a04d44095604", kill_on_drop: false }`
[INFO] [stdout] f3c9c7f6739d44b9712ac9bd52a1a22e5dbe4070c34e9382c095a04d44095604