[INFO] updating cached repository https://github.com/rkanati/union-find
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2f6002ae785ab28766995c06e684b4a9f7dbf28
[INFO] testing rkanati/union-find against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frkanati%2Funion-find" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rkanati/union-find on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rkanati/union-find
[INFO] finished tweaking git repo https://github.com/rkanati/union-find
[INFO] tweaked toml for git repo https://github.com/rkanati/union-find written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/rkanati/union-find already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 721ab5ef6e5e9c9814840cca12327f69e4837453adfbcbba6ce6436188b1b2f7
[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" "721ab5ef6e5e9c9814840cca12327f69e4837453adfbcbba6ce6436188b1b2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "721ab5ef6e5e9c9814840cca12327f69e4837453adfbcbba6ce6436188b1b2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "721ab5ef6e5e9c9814840cca12327f69e4837453adfbcbba6ce6436188b1b2f7", kill_on_drop: false }`
[INFO] [stdout] 721ab5ef6e5e9c9814840cca12327f69e4837453adfbcbba6ce6436188b1b2f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0cfb807882b3fceee11419ad248bf8a915638e228039a233b45703ebd6b93a5e
[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" "0cfb807882b3fceee11419ad248bf8a915638e228039a233b45703ebd6b93a5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling union-find v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Repr`
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct Repr<T> {
[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: `update`
[INFO] [stdout]  --> src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn update(&mut self, mut other: Repr<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Node`
[INFO] [stdout]   --> src/main.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     enum Node<T> {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_repr`
[INFO] [stdout]   --> src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |         fn to_repr(self) -> Repr<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `repr`
[INFO] [stdout]   --> src/main.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |         fn repr(&mut self) -> &mut Repr<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rank`
[INFO] [stdout]   --> src/main.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn rank(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update`
[INFO] [stdout]   --> src/main.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |         fn update(&mut self, absorb: Node<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_repr`
[INFO] [stdout]   --> src/main.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |         fn new_repr(data: T) -> Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `UF`
[INFO] [stdout]   --> src/main.rs:62:16
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub struct UF<T = ()> {
[INFO] [stdout]    |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/main.rs:70:16
[INFO] [stdout]    |
[INFO] [stdout] 70 |         pub fn new() -> UF<T> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_point`
[INFO] [stdout]   --> src/main.rs:74:16
[INFO] [stdout]    |
[INFO] [stdout] 74 |         pub fn make_point(&mut self, data: T) -> Point {
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `node`
[INFO] [stdout]   --> src/main.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 |         fn node(&self, index: usize) -> &Node<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `node_mut`
[INFO] [stdout]   --> src/main.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |         fn node_mut(&mut self, index: usize) -> &mut Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/main.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |         fn parent(&self, index: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find`
[INFO] [stdout]   --> src/main.rs:95:16
[INFO] [stdout]    |
[INFO] [stdout] 95 |         pub fn find(&mut self, mut point: Point) -> Point {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/main.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 |         pub fn get(&mut self, point: Point) -> &T {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_and_get`
[INFO] [stdout]    --> src/main.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |         pub fn find_and_get(&mut self, point: Point) -> (Point, &T) {
[INFO] [stdout]     |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `union`
[INFO] [stdout]    --> src/main.rs:117:16
[INFO] [stdout]     |
[INFO] [stdout] 117 |         pub fn union(&mut self, a: Point, b: Point, merge: impl FnOnce(T, T) -> T) -> Point {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "0cfb807882b3fceee11419ad248bf8a915638e228039a233b45703ebd6b93a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cfb807882b3fceee11419ad248bf8a915638e228039a233b45703ebd6b93a5e", kill_on_drop: false }`
[INFO] [stdout] 0cfb807882b3fceee11419ad248bf8a915638e228039a233b45703ebd6b93a5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "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] 50bbafebfcede409cc7e5cf53a495115ccae01927e0581ab5d27ae51ffc284dc
[INFO] running `Command { std: "docker" "start" "-a" "50bbafebfcede409cc7e5cf53a495115ccae01927e0581ab5d27ae51ffc284dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling union-find v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Repr`
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct Repr<T> {
[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: `update`
[INFO] [stdout]  --> src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn update(&mut self, mut other: Repr<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Node`
[INFO] [stdout]   --> src/main.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     enum Node<T> {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_repr`
[INFO] [stdout]   --> src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |         fn to_repr(self) -> Repr<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `repr`
[INFO] [stdout]   --> src/main.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |         fn repr(&mut self) -> &mut Repr<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rank`
[INFO] [stdout]   --> src/main.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn rank(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update`
[INFO] [stdout]   --> src/main.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |         fn update(&mut self, absorb: Node<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_repr`
[INFO] [stdout]   --> src/main.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |         fn new_repr(data: T) -> Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `UF`
[INFO] [stdout]   --> src/main.rs:62:16
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub struct UF<T = ()> {
[INFO] [stdout]    |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/main.rs:70:16
[INFO] [stdout]    |
[INFO] [stdout] 70 |         pub fn new() -> UF<T> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_point`
[INFO] [stdout]   --> src/main.rs:74:16
[INFO] [stdout]    |
[INFO] [stdout] 74 |         pub fn make_point(&mut self, data: T) -> Point {
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `node`
[INFO] [stdout]   --> src/main.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 |         fn node(&self, index: usize) -> &Node<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `node_mut`
[INFO] [stdout]   --> src/main.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |         fn node_mut(&mut self, index: usize) -> &mut Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/main.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |         fn parent(&self, index: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find`
[INFO] [stdout]   --> src/main.rs:95:16
[INFO] [stdout]    |
[INFO] [stdout] 95 |         pub fn find(&mut self, mut point: Point) -> Point {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/main.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 |         pub fn get(&mut self, point: Point) -> &T {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_and_get`
[INFO] [stdout]    --> src/main.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |         pub fn find_and_get(&mut self, point: Point) -> (Point, &T) {
[INFO] [stdout]     |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `union`
[INFO] [stdout]    --> src/main.rs:117:16
[INFO] [stdout]     |
[INFO] [stdout] 117 |         pub fn union(&mut self, a: Point, b: Point, merge: impl FnOnce(T, T) -> T) -> Point {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.64s
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "50bbafebfcede409cc7e5cf53a495115ccae01927e0581ab5d27ae51ffc284dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50bbafebfcede409cc7e5cf53a495115ccae01927e0581ab5d27ae51ffc284dc", kill_on_drop: false }`
[INFO] [stdout] 50bbafebfcede409cc7e5cf53a495115ccae01927e0581ab5d27ae51ffc284dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", 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] 92fa396d13740ab4c4a6617253aab3db1f68207190f7ed3746a774709d348b6b
[INFO] running `Command { std: "docker" "start" "-a" "92fa396d13740ab4c4a6617253aab3db1f68207190f7ed3746a774709d348b6b", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: struct is never constructed: `Repr`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 3 |     struct Repr<T> {
[INFO] [stdout] 
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `update`
[INFO] [stderr]  --> src/main.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |         fn update(&mut self, mut other: Repr<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Node`
[INFO] [stderr]   --> src/main.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 |     enum Node<T> {
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_repr`
[INFO] [stderr]   --> src/main.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |         fn to_repr(self) -> Repr<T> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `repr`
[INFO] [stderr]   --> src/main.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |         fn repr(&mut self) -> &mut Repr<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `rank`
[INFO] [stderr]   --> src/main.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |         fn rank(&self) -> usize {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `update`
[INFO] [stderr]   --> src/main.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 |         fn update(&mut self, absorb: Node<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_repr`
[INFO] [stderr]   --> src/main.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 |         fn new_repr(data: T) -> Node<T> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `UF`
[INFO] [stderr]   --> src/main.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub struct UF<T = ()> {
[INFO] [stderr]    |                ^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/main.rs:70:16
[INFO] [stderr]    |
[INFO] [stderr] 70 |         pub fn new() -> UF<T> {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `make_point`
[INFO] [stderr]   --> src/main.rs:74:16
[INFO] [stderr]    |
[INFO] [stderr] 74 |         pub fn make_point(&mut self, data: T) -> Point {
[INFO] [stderr]    |                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `node`
[INFO] [stderr]   --> src/main.rs:80:12
[INFO] [stderr]    |
[INFO] [stderr] 80 |         fn node(&self, index: usize) -> &Node<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `node_mut`
[INFO] [stderr]   --> src/main.rs:84:12
[INFO] [stderr]    |
[INFO] [stderr] 84 |         fn node_mut(&mut self, index: usize) -> &mut Node<T> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parent`
[INFO] [stderr]   --> src/main.rs:88:12
[INFO] [stderr]    |
[INFO] [stderr] 88 |         fn parent(&self, index: usize) -> usize {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find`
[INFO] [stderr]   --> src/main.rs:95:16
[INFO] [stderr]    |
[INFO] [stderr] 95 |         pub fn find(&mut self, mut point: Point) -> Point {
[INFO] [stderr]    |                ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]    --> src/main.rs:103:16
[INFO] [stderr]     |
[INFO] [stderr] 103 |         pub fn get(&mut self, point: Point) -> &T {
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find_and_get`
[INFO] [stderr]    --> src/main.rs:107:16
[INFO] [stderr]     |
[INFO] [stderr] 107 |         pub fn find_and_get(&mut self, point: Point) -> (Point, &T) {
[INFO] [stderr]     |                ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `union`
[INFO] [stderr]    --> src/main.rs:117:16
[INFO] [stderr]     |
[INFO] [stderr] 117 |         pub fn union(&mut self, a: Point, b: Point, merge: impl FnOnce(T, T) -> T) -> Point {
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 18 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/union_find-dd6b0b23fd8d4312
[INFO] running `Command { std: "docker" "inspect" "92fa396d13740ab4c4a6617253aab3db1f68207190f7ed3746a774709d348b6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92fa396d13740ab4c4a6617253aab3db1f68207190f7ed3746a774709d348b6b", kill_on_drop: false }`
[INFO] [stdout] 92fa396d13740ab4c4a6617253aab3db1f68207190f7ed3746a774709d348b6b