[INFO] cloning repository https://github.com/VladADragos/rust_sandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VladADragos/rust_sandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVladADragos%2Frust_sandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVladADragos%2Frust_sandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 542df2b3bf7e7a72f61f2ed4966321ac802095ab
[INFO] testing VladADragos/rust_sandbox against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVladADragos%2Frust_sandbox" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VladADragos/rust_sandbox on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VladADragos/rust_sandbox
[INFO] finished tweaking git repo https://github.com/VladADragos/rust_sandbox
[INFO] tweaked toml for git repo https://github.com/VladADragos/rust_sandbox written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/VladADragos/rust_sandbox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8aefb43f0a76292cb82674288f65437bad94dfaab45e0d3932c811f801144061
[INFO] running `Command { std: "docker" "start" "-a" "8aefb43f0a76292cb82674288f65437bad94dfaab45e0d3932c811f801144061", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8aefb43f0a76292cb82674288f65437bad94dfaab45e0d3932c811f801144061", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aefb43f0a76292cb82674288f65437bad94dfaab45e0d3932c811f801144061", kill_on_drop: false }`
[INFO] [stdout] 8aefb43f0a76292cb82674288f65437bad94dfaab45e0d3932c811f801144061
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea05e1091e2a2a9c4fb5fb9779a648d7974ec82c511c886f4a85050cfa73593f
[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" "ea05e1091e2a2a9c4fb5fb9779a648d7974ec82c511c886f4a85050cfa73593f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::binary_heap`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::binary_heap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/heaps/heap.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_mat`
[INFO] [stdout]  --> src/mat.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_mat() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `det`
[INFO] [stdout]  --> src/mat.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn det(mat: &[[f64; 3]; 3]) -> f64 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_sorted`
[INFO] [stdout]  --> src/sorting/is_sorted.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn is_sorted<T: PartialOrd>(arr: &[T]) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/heaps/comparator.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new() -> MinComparator {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_equal`
[INFO] [stdout]   --> src/heaps/comparator.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn is_equal(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_less`
[INFO] [stdout]   --> src/heaps/comparator.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn is_less(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unwrap`
[INFO] [stdout]   --> src/heaps/comparator.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn unwrap(self) -> Ordering {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/heaps/heap.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn len(self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peak`
[INFO] [stdout]   --> src/heaps/heap.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn peak(self) -> Option<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_root`
[INFO] [stdout]   --> src/heaps/heap.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn remove_root(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sift_down`
[INFO] [stdout]   --> src/heaps/heap.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn sift_down(&mut self, i: usize) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_right_child`
[INFO] [stdout]    --> src/heaps/heap.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn get_right_child(i: usize) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_left_child`
[INFO] [stdout]    --> src/heaps/heap.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn get_left_child(i: usize) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.21s
[INFO] running `Command { std: "docker" "inspect" "ea05e1091e2a2a9c4fb5fb9779a648d7974ec82c511c886f4a85050cfa73593f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea05e1091e2a2a9c4fb5fb9779a648d7974ec82c511c886f4a85050cfa73593f", kill_on_drop: false }`
[INFO] [stdout] ea05e1091e2a2a9c4fb5fb9779a648d7974ec82c511c886f4a85050cfa73593f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c85588426b34c198fd31218a987c2d0dd30790d48ccc76b5e569a4c58652d7bc
[INFO] running `Command { std: "docker" "start" "-a" "c85588426b34c198fd31218a987c2d0dd30790d48ccc76b5e569a4c58652d7bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::binary_heap`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::binary_heap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/heaps/heap.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_mat`
[INFO] [stdout]  --> src/mat.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_mat() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `det`
[INFO] [stdout]  --> src/mat.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn det(mat: &[[f64; 3]; 3]) -> f64 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/heaps/comparator.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new() -> MinComparator {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_equal`
[INFO] [stdout]   --> src/heaps/comparator.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn is_equal(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_less`
[INFO] [stdout]   --> src/heaps/comparator.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn is_less(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unwrap`
[INFO] [stdout]   --> src/heaps/comparator.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn unwrap(self) -> Ordering {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/heaps/heap.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn len(self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peak`
[INFO] [stdout]   --> src/heaps/heap.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn peak(self) -> Option<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_root`
[INFO] [stdout]   --> src/heaps/heap.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn remove_root(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sift_down`
[INFO] [stdout]   --> src/heaps/heap.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn sift_down(&mut self, i: usize) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_right_child`
[INFO] [stdout]    --> src/heaps/heap.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn get_right_child(i: usize) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_left_child`
[INFO] [stdout]    --> src/heaps/heap.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn get_left_child(i: usize) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "c85588426b34c198fd31218a987c2d0dd30790d48ccc76b5e569a4c58652d7bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c85588426b34c198fd31218a987c2d0dd30790d48ccc76b5e569a4c58652d7bc", kill_on_drop: false }`
[INFO] [stdout] c85588426b34c198fd31218a987c2d0dd30790d48ccc76b5e569a4c58652d7bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 71db0d2fab64b3a3d894d2c1039fe4e946b82c9d12c070608a85650f71b6cac8
[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" "71db0d2fab64b3a3d894d2c1039fe4e946b82c9d12c070608a85650f71b6cac8", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::collections::binary_heap`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::binary_heap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/heaps/heap.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_mat`
[INFO] [stderr]  --> src/mat.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn test_mat() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `det`
[INFO] [stderr]  --> src/mat.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn det(mat: &[[f64; 3]; 3]) -> f64 {
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/heaps/comparator.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new() -> MinComparator {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_equal`
[INFO] [stderr]   --> src/heaps/comparator.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn is_equal(self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_less`
[INFO] [stderr]   --> src/heaps/comparator.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn is_less(self) -> bool {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `unwrap`
[INFO] [stderr]   --> src/heaps/comparator.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn unwrap(self) -> Ordering {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/heaps/heap.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn len(self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `peak`
[INFO] [stderr]   --> src/heaps/heap.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn peak(self) -> Option<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove_root`
[INFO] [stderr]   --> src/heaps/heap.rs:47:12
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn remove_root(&mut self) -> Option<T> {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `sift_down`
[INFO] [stderr]   --> src/heaps/heap.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn sift_down(&mut self, i: usize) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_right_child`
[INFO] [stderr]    --> src/heaps/heap.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn get_right_child(i: usize) -> usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_left_child`
[INFO] [stderr]    --> src/heaps/heap.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn get_left_child(i: usize) -> usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/exercises-d6ca87348a819162
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test sorting::quick_sort::partition_test ... ok
[INFO] [stdout] test sorting::is_sorted::is_sorted_test ... ok
[INFO] [stdout] test sorting::quick_sort::quick_sort_test ... ok
[INFO] [stdout] test sorting::bubble_sort::bubble_sort_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "71db0d2fab64b3a3d894d2c1039fe4e946b82c9d12c070608a85650f71b6cac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71db0d2fab64b3a3d894d2c1039fe4e946b82c9d12c070608a85650f71b6cac8", kill_on_drop: false }`
[INFO] [stdout] 71db0d2fab64b3a3d894d2c1039fe4e946b82c9d12c070608a85650f71b6cac8
