[INFO] cloning 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" "clone" "--bare" "https://github.com/rkanati/union-find" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frkanati%2Funion-find", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frkanati%2Funion-find'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2f6002ae785ab28766995c06e684b4a9f7dbf28
[INFO] testing rkanati/union-find against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frkanati%2Funion-find" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[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-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rkanati/union-find on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rkanati/union-find already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0e06e30f0f0fbfdb2cf704349c3da466a0693715aa99828569db4e7fc620e08
[INFO] running `Command { std: "docker" "start" "-a" "c0e06e30f0f0fbfdb2cf704349c3da466a0693715aa99828569db4e7fc620e08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0e06e30f0f0fbfdb2cf704349c3da466a0693715aa99828569db4e7fc620e08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0e06e30f0f0fbfdb2cf704349c3da466a0693715aa99828569db4e7fc620e08", kill_on_drop: false }`
[INFO] [stdout] c0e06e30f0f0fbfdb2cf704349c3da466a0693715aa99828569db4e7fc620e08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4acbbb8f00d46f22a2d3ca5de432aa999730e00c6f489b5e18a37f532895d83b
[INFO] running `Command { std: "docker" "start" "-a" "4acbbb8f00d46f22a2d3ca5de432aa999730e00c6f489b5e18a37f532895d83b", kill_on_drop: false }`
[INFO] [stderr]    Compiling union-find v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `tests`
[INFO] [stdout]    --> src/main.rs:142:11
[INFO] [stdout]     |
[INFO] [stdout] 142 |     #[cfg(tests)]
[INFO] [stdout]     |           ^^^^^ help: there is a config with a similar name: `test`
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tests)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tests)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Repr` is never constructed
[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: method `update` is never used
[INFO] [stdout]  --> src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     impl<T> Repr<T> {
[INFO] [stdout]   |     --------------- method in this implementation
[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 `Node` is never used
[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 items `to_repr`, `repr`, `rank`, `update`, and `new_repr` are never used
[INFO] [stdout]   --> src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     impl<T> Node<T> {
[INFO] [stdout]    |     --------------- associated items in this implementation
[INFO] [stdout] 27 |         fn to_repr(self) -> Repr<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |         fn repr(&mut self) -> &mut Repr<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |         fn rank(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |         fn update(&mut self, absorb: Node<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         fn new_repr(data: T) -> Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UF` is never constructed
[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: struct `Point` is never constructed
[INFO] [stdout]   --> src/main.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub struct Point(usize);
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/main.rs:70:16
[INFO] [stdout]     |
[INFO] [stdout]  69 |     impl<T> UF<T> {
[INFO] [stdout]     |     ------------- associated items in this implementation
[INFO] [stdout]  70 |         pub fn new() -> UF<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout]  74 |         pub fn make_point(&mut self, data: T) -> Point {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |         fn node(&self, index: usize) -> &Node<T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  84 |         fn node_mut(&mut self, index: usize) -> &mut Node<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  88 |         fn parent(&self, index: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  95 |         pub fn find(&mut self, mut point: Point) -> Point {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |         pub fn get(&mut self, point: Point) -> &T {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         pub fn find_and_get(&mut self, point: Point) -> (Point, &T) {
[INFO] [stdout]     |                ^^^^^^^^^^^^
[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 `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "4acbbb8f00d46f22a2d3ca5de432aa999730e00c6f489b5e18a37f532895d83b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4acbbb8f00d46f22a2d3ca5de432aa999730e00c6f489b5e18a37f532895d83b", kill_on_drop: false }`
[INFO] [stdout] 4acbbb8f00d46f22a2d3ca5de432aa999730e00c6f489b5e18a37f532895d83b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36303d4830b840b71a9df770adb101c5c1305ac6e79085eba59c5a13e9efb8ae
[INFO] running `Command { std: "docker" "start" "-a" "36303d4830b840b71a9df770adb101c5c1305ac6e79085eba59c5a13e9efb8ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling union-find v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `tests`
[INFO] [stdout]    --> src/main.rs:142:11
[INFO] [stdout]     |
[INFO] [stdout] 142 |     #[cfg(tests)]
[INFO] [stdout]     |           ^^^^^ help: there is a config with a similar name: `test`
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tests)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tests)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Repr` is never constructed
[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: method `update` is never used
[INFO] [stdout]  --> src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     impl<T> Repr<T> {
[INFO] [stdout]   |     --------------- method in this implementation
[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 `Node` is never used
[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 items `to_repr`, `repr`, `rank`, `update`, and `new_repr` are never used
[INFO] [stdout]   --> src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     impl<T> Node<T> {
[INFO] [stdout]    |     --------------- associated items in this implementation
[INFO] [stdout] 27 |         fn to_repr(self) -> Repr<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |         fn repr(&mut self) -> &mut Repr<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |         fn rank(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |         fn update(&mut self, absorb: Node<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         fn new_repr(data: T) -> Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UF` is never constructed
[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: struct `Point` is never constructed
[INFO] [stdout]   --> src/main.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub struct Point(usize);
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/main.rs:70:16
[INFO] [stdout]     |
[INFO] [stdout]  69 |     impl<T> UF<T> {
[INFO] [stdout]     |     ------------- associated items in this implementation
[INFO] [stdout]  70 |         pub fn new() -> UF<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout]  74 |         pub fn make_point(&mut self, data: T) -> Point {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |         fn node(&self, index: usize) -> &Node<T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  84 |         fn node_mut(&mut self, index: usize) -> &mut Node<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  88 |         fn parent(&self, index: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  95 |         pub fn find(&mut self, mut point: Point) -> Point {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |         pub fn get(&mut self, point: Point) -> &T {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         pub fn find_and_get(&mut self, point: Point) -> (Point, &T) {
[INFO] [stdout]     |                ^^^^^^^^^^^^
[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` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "36303d4830b840b71a9df770adb101c5c1305ac6e79085eba59c5a13e9efb8ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36303d4830b840b71a9df770adb101c5c1305ac6e79085eba59c5a13e9efb8ae", kill_on_drop: false }`
[INFO] [stdout] 36303d4830b840b71a9df770adb101c5c1305ac6e79085eba59c5a13e9efb8ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 551d791380437f2634b361e4d119ae4cfc58bdc557f271f2848014b40d3c08a9
[INFO] running `Command { std: "docker" "start" "-a" "551d791380437f2634b361e4d119ae4cfc58bdc557f271f2848014b40d3c08a9", kill_on_drop: false }`
[INFO] [stderr] warning: unexpected `cfg` condition name: `tests`
[INFO] [stderr]    --> src/main.rs:142:11
[INFO] [stderr]     |
[INFO] [stderr] 142 |     #[cfg(tests)]
[INFO] [stderr]     |           ^^^^^ help: there is a config with a similar name: `test`
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider using a Cargo feature instead
[INFO] [stderr]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stderr]              [lints.rust]
[INFO] [stderr]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tests)'] }
[INFO] [stderr]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tests)");` to the top of the `build.rs`
[INFO] [stderr]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Repr` is never constructed
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 |     struct Repr<T> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `update` is never used
[INFO] [stderr]  --> src/main.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     impl<T> Repr<T> {
[INFO] [stderr]   |     --------------- method in this implementation
[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 `Node` is never used
[INFO] [stderr]   --> src/main.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 |     enum Node<T> {
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `to_repr`, `repr`, `rank`, `update`, and `new_repr` are never used
[INFO] [stderr]   --> src/main.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     impl<T> Node<T> {
[INFO] [stderr]    |     --------------- associated items in this implementation
[INFO] [stderr] 27 |         fn to_repr(self) -> Repr<T> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 34 |         fn repr(&mut self) -> &mut Repr<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 41 |         fn rank(&self) -> usize {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 48 |         fn update(&mut self, absorb: Node<T>, merge: impl FnOnce(T, T) -> T) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 54 |         fn new_repr(data: T) -> Node<T> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `UF` is never constructed
[INFO] [stderr]   --> src/main.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub struct UF<T = ()> {
[INFO] [stderr]    |                ^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/main.rs:67:16
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub struct Point(usize);
[INFO] [stderr]    |                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/main.rs:70:16
[INFO] [stderr]     |
[INFO] [stderr]  69 |     impl<T> UF<T> {
[INFO] [stderr]     |     ------------- associated items in this implementation
[INFO] [stderr]  70 |         pub fn new() -> UF<T> {
[INFO] [stderr]     |                ^^^
[INFO] [stderr] ...
[INFO] [stderr]  74 |         pub fn make_point(&mut self, data: T) -> Point {
[INFO] [stderr]     |                ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  80 |         fn node(&self, index: usize) -> &Node<T> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr]  84 |         fn node_mut(&mut self, index: usize) -> &mut Node<T> {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  88 |         fn parent(&self, index: usize) -> usize {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  95 |         pub fn find(&mut self, mut point: Point) -> Point {
[INFO] [stderr]     |                ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 103 |         pub fn get(&mut self, point: Point) -> &T {
[INFO] [stderr]     |                ^^^
[INFO] [stderr] ...
[INFO] [stderr] 107 |         pub fn find_and_get(&mut self, point: Point) -> (Point, &T) {
[INFO] [stderr]     |                ^^^^^^^^^^^^
[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: `union-find` (bin "union-find" test) generated 8 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/union_find-dbf21a16e0fc2a73)
[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" "551d791380437f2634b361e4d119ae4cfc58bdc557f271f2848014b40d3c08a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "551d791380437f2634b361e4d119ae4cfc58bdc557f271f2848014b40d3c08a9", kill_on_drop: false }`
[INFO] [stdout] 551d791380437f2634b361e4d119ae4cfc58bdc557f271f2848014b40d3c08a9
