[INFO] cloning repository https://github.com/andreaguarino/more_rust_structures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andreaguarino/more_rust_structures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreaguarino%2Fmore_rust_structures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreaguarino%2Fmore_rust_structures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f650bca823bbe9c51118ded2d92af9dc07ee2b8a
[INFO] checking andreaguarino/more_rust_structures/f650bca823bbe9c51118ded2d92af9dc07ee2b8a against master#717f5df2c308dfb4b7b8e6c002c11fe8269c4011 for pr-133274
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreaguarino%2Fmore_rust_structures" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andreaguarino/more_rust_structures on toolchain 717f5df2c308dfb4b7b8e6c002c11fe8269c4011
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[INFO] started tweaking git repo https://github.com/andreaguarino/more_rust_structures
[INFO] finished tweaking git repo https://github.com/andreaguarino/more_rust_structures
[INFO] tweaked toml for git repo https://github.com/andreaguarino/more_rust_structures written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/andreaguarino/more_rust_structures 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" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5571faba6f88629abf174a4b325273a8886cedf73e8b076e784841a06d6a5087
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[INFO] running `Command { std: "docker" "rm" "-f" "5571faba6f88629abf174a4b325273a8886cedf73e8b076e784841a06d6a5087", kill_on_drop: false }`
[INFO] [stdout] 5571faba6f88629abf174a4b325273a8886cedf73e8b076e784841a06d6a5087
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc345edaf199dbd5e2600572fb6d0422e013490a79fc8e2260f84b7d4407f5dc
[INFO] running `Command { std: "docker" "start" "-a" "dc345edaf199dbd5e2600572fb6d0422e013490a79fc8e2260f84b7d4407f5dc", kill_on_drop: false }`
[INFO] [stderr]     Checking more_rust_structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `selection_sort` is never used
[INFO] [stdout]   --> src/sorting/mod.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn selection_sort<T: Ord>(list: &mut Vec<T>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insertion_sort` is never used
[INFO] [stdout]   --> src/sorting/mod.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn insertion_sort<T: Ord>(list: &mut Vec<T>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Stack` is never used
[INFO] [stdout]  --> src/stack/mod.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Stack<T> {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayStack` is never constructed
[INFO] [stdout]  --> src/stack/array_stack.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct ArrayStack<T: Clone> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `capacity`, and `update_capacity` are never used
[INFO] [stdout]   --> src/stack/array_stack.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl<T: Clone> ArrayStack<T> {
[INFO] [stdout]    | ---------------------------- associated items in this implementation
[INFO] [stdout] 55 |     fn new(initial_capacity: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn capacity(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     fn update_capacity(&mut self, new_capacity: usize) -> () {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/stack/linked_list_stack.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Node<T: Clone> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedListStack` is never constructed
[INFO] [stdout]   --> src/stack/linked_list_stack.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct LinkedListStack<T: Clone> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/stack/linked_list_stack.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl<T: Clone> LinkedListStack<T> {
[INFO] [stdout]    | --------------------------------- associated function in this implementation
[INFO] [stdout] 54 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `union`, `is_connected`, `find`, and `count` are never used
[INFO] [stdout]   --> src/union_find/mod.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait UnionFind {
[INFO] [stdout]    |           --------- methods in this trait
[INFO] [stdout] 14 |     /// Establishes a "union" relashionship between the integer values `p` and `q`
[INFO] [stdout] 15 |     fn union(&mut self, p: u32, q: u32) -> ();
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 16 |     /// Whether the two provided integer values belong to the same set, or two disjoint sets.
[INFO] [stdout] 17 |     fn is_connected(&self, p: u32, q: u32) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 18 |     /// Returns the set identifier of the provided value
[INFO] [stdout] 19 |     fn find(&self, p: u32) -> u32;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 20 |     /// The number of integer values in the data structure.
[INFO] [stdout] 21 |     fn count(&self) -> usize;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QuickFind` is never constructed
[INFO] [stdout]  --> src/union_find/quick_find.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct QuickFind {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/union_find/quick_find.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl QuickFind {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 52 |     fn new(n: u32) -> QuickFind {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QuickUnion` is never constructed
[INFO] [stdout]  --> src/union_find/quick_union.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct QuickUnion {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `root` are never used
[INFO] [stdout]   --> src/union_find/quick_union.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl QuickUnion {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 41 |     fn new(n: u32) -> QuickUnion {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn root(&self, p: u32) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/union_find/weighted_quick_union.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl WeightedQuickUnion {
[INFO] [stdout]    | ----------------------- associated function in this implementation
[INFO] [stdout] 51 |     pub fn new(n: u32) -> WeightedQuickUnion {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WeightedQuickUnionWithPathCompression` is never constructed
[INFO] [stdout]  --> src/union_find/weighted_quick_union_with_path_compression.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct WeightedQuickUnionWithPathCompression<WQU> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `root` are never used
[INFO] [stdout]   --> src/union_find/weighted_quick_union_with_path_compression.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl WeightedQuickUnionWithPathCompression<WeightedQuickUnion> {
[INFO] [stdout]    | -------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 36 |     fn new(n: u32) -> WeightedQuickUnionWithPathCompression<WeightedQuickUnion> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn root(&mut self, p: u32) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "dc345edaf199dbd5e2600572fb6d0422e013490a79fc8e2260f84b7d4407f5dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc345edaf199dbd5e2600572fb6d0422e013490a79fc8e2260f84b7d4407f5dc", kill_on_drop: false }`
[INFO] [stdout] dc345edaf199dbd5e2600572fb6d0422e013490a79fc8e2260f84b7d4407f5dc