[INFO] cloning repository https://github.com/roynalnaruto/rs_merkle_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/roynalnaruto/rs_merkle_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froynalnaruto%2Frs_merkle_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froynalnaruto%2Frs_merkle_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62324ec83f33a6413fa0dead25dcb1d18e6ff2da
[INFO] testing roynalnaruto/rs_merkle_tree against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froynalnaruto%2Frs_merkle_tree" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roynalnaruto/rs_merkle_tree on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/roynalnaruto/rs_merkle_tree
[INFO] finished tweaking git repo https://github.com/roynalnaruto/rs_merkle_tree
[INFO] tweaked toml for git repo https://github.com/roynalnaruto/rs_merkle_tree written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/roynalnaruto/rs_merkle_tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b85d1c5aa0d02a1a34afd18a6f54714c10dd3be51135546495454bf9fac31a48
[INFO] running `Command { std: "docker" "start" "-a" "b85d1c5aa0d02a1a34afd18a6f54714c10dd3be51135546495454bf9fac31a48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b85d1c5aa0d02a1a34afd18a6f54714c10dd3be51135546495454bf9fac31a48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b85d1c5aa0d02a1a34afd18a6f54714c10dd3be51135546495454bf9fac31a48", kill_on_drop: false }`
[INFO] [stdout] b85d1c5aa0d02a1a34afd18a6f54714c10dd3be51135546495454bf9fac31a48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f025af731bec8dfced892cda7f696450b5f1af6e0cba0554f6372b679fec2d6
[INFO] running `Command { std: "docker" "start" "-a" "8f025af731bec8dfced892cda7f696450b5f1af6e0cba0554f6372b679fec2d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/merkle_tree.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     value: Option<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/merkle_tree.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(Clone, Debug)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hash`
[INFO] [stdout]   --> src/merkle_tree.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     hash: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/merkle_tree.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(Clone, Debug)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MerkleTree`
[INFO] [stdout]   --> src/merkle_tree.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct MerkleTree<H, T>
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root`
[INFO] [stdout]   --> src/merkle_tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn root(&self) -> Result<&Node<T>, &'static str> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn count_leaves(&self) -> Result<usize, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn add_leaves(&mut self, values: &mut Vec<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn from_leaves(values: &mut Vec<T>, mut hasher: H) -> Result<Self, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_parent_nodes`
[INFO] [stdout]    --> src/merkle_tree.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn build_parent_nodes(children: &Vec<Node<T>>, mut hasher: &mut H) -> Vec<Node<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_leaf`
[INFO] [stdout]    --> src/merkle_tree.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn as_leaf(v: &T, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_internal`
[INFO] [stdout]    --> src/merkle_tree.rs:153:8
[INFO] [stdout]     |
[INFO] [stdout] 153 |     fn as_internal(left: &Node<T>, right: &Node<T>, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.52s
[INFO] running `Command { std: "docker" "inspect" "8f025af731bec8dfced892cda7f696450b5f1af6e0cba0554f6372b679fec2d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f025af731bec8dfced892cda7f696450b5f1af6e0cba0554f6372b679fec2d6", kill_on_drop: false }`
[INFO] [stdout] 8f025af731bec8dfced892cda7f696450b5f1af6e0cba0554f6372b679fec2d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8f55ce44aec33ddd2f8b16887e9cb399fc3229527ae9a0a7f7cc1a13f6ed076
[INFO] running `Command { std: "docker" "start" "-a" "b8f55ce44aec33ddd2f8b16887e9cb399fc3229527ae9a0a7f7cc1a13f6ed076", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/merkle_tree.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     value: Option<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/merkle_tree.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(Clone, Debug)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hash`
[INFO] [stdout]   --> src/merkle_tree.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     hash: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/merkle_tree.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(Clone, Debug)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MerkleTree`
[INFO] [stdout]   --> src/merkle_tree.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct MerkleTree<H, T>
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root`
[INFO] [stdout]   --> src/merkle_tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn root(&self) -> Result<&Node<T>, &'static str> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn count_leaves(&self) -> Result<usize, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn add_leaves(&mut self, values: &mut Vec<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn from_leaves(values: &mut Vec<T>, mut hasher: H) -> Result<Self, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `build_parent_nodes`
[INFO] [stdout]    --> src/merkle_tree.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn build_parent_nodes(children: &Vec<Node<T>>, mut hasher: &mut H) -> Vec<Node<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_leaf`
[INFO] [stdout]    --> src/merkle_tree.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn as_leaf(v: &T, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_internal`
[INFO] [stdout]    --> src/merkle_tree.rs:153:8
[INFO] [stdout]     |
[INFO] [stdout] 153 |     fn as_internal(left: &Node<T>, right: &Node<T>, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "b8f55ce44aec33ddd2f8b16887e9cb399fc3229527ae9a0a7f7cc1a13f6ed076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8f55ce44aec33ddd2f8b16887e9cb399fc3229527ae9a0a7f7cc1a13f6ed076", kill_on_drop: false }`
[INFO] [stdout] b8f55ce44aec33ddd2f8b16887e9cb399fc3229527ae9a0a7f7cc1a13f6ed076
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 218f42709ec7749909d853fe6c088496a3633458d7ad480afa2da4ad8c117b1a
[INFO] running `Command { std: "docker" "start" "-a" "218f42709ec7749909d853fe6c088496a3633458d7ad480afa2da4ad8c117b1a", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]   --> src/merkle_tree.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     value: Option<T>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/merkle_tree.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 | #[derive(Clone, Debug)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `hash`
[INFO] [stderr]   --> src/merkle_tree.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     hash: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/merkle_tree.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 | #[derive(Clone, Debug)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MerkleTree`
[INFO] [stderr]   --> src/merkle_tree.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct MerkleTree<H, T>
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `root`
[INFO] [stderr]   --> src/merkle_tree.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn root(&self) -> Result<&Node<T>, &'static str> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `count_leaves`
[INFO] [stderr]   --> src/merkle_tree.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn count_leaves(&self) -> Result<usize, &'static str> {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_leaves`
[INFO] [stderr]   --> src/merkle_tree.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn add_leaves(&mut self, values: &mut Vec<T>) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from_leaves`
[INFO] [stderr]   --> src/merkle_tree.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn from_leaves(values: &mut Vec<T>, mut hasher: H) -> Result<Self, &'static str> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `build_parent_nodes`
[INFO] [stderr]    --> src/merkle_tree.rs:121:8
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn build_parent_nodes(children: &Vec<Node<T>>, mut hasher: &mut H) -> Vec<Node<T>> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `as_leaf`
[INFO] [stderr]    --> src/merkle_tree.rs:140:8
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn as_leaf(v: &T, hasher: &mut H) -> Node<T> {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `as_internal`
[INFO] [stderr]    --> src/merkle_tree.rs:153:8
[INFO] [stderr]     |
[INFO] [stderr] 153 |     fn as_internal(left: &Node<T>, right: &Node<T>, hasher: &mut H) -> Node<T> {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `merkle_tree` (lib) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/merkle_tree-47e127c196114fd4)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test merkle_tree::tests::test_as_leaf ... ok
[INFO] [stdout] test merkle_tree::tests::test_as_internal ... ok
[INFO] [stdout] test merkle_tree::tests::test_from_leaves_2n ... ok
[INFO] [stdout] test merkle_tree::tests::test_add_leaves ... ok
[INFO] [stdout] test merkle_tree::tests::test_from_leaves_not_2n ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests merkle_tree
[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" "218f42709ec7749909d853fe6c088496a3633458d7ad480afa2da4ad8c117b1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "218f42709ec7749909d853fe6c088496a3633458d7ad480afa2da4ad8c117b1a", kill_on_drop: false }`
[INFO] [stdout] 218f42709ec7749909d853fe6c088496a3633458d7ad480afa2da4ad8c117b1a