[INFO] cloning repository https://github.com/niko047/Computer-Science-in-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/niko047/Computer-Science-in-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniko047%2FComputer-Science-in-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniko047%2FComputer-Science-in-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fbd1cf2633151140dc25d3bb4b07c00a43537225
[INFO] checking niko047/Computer-Science-in-Rust against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniko047%2FComputer-Science-in-Rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/niko047/Computer-Science-in-Rust on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/niko047/Computer-Science-in-Rust
[INFO] finished tweaking git repo https://github.com/niko047/Computer-Science-in-Rust
[INFO] tweaked toml for git repo https://github.com/niko047/Computer-Science-in-Rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/niko047/Computer-Science-in-Rust 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9fce4a8e58fbab410fa98b2e86d8cd48e5260e06abe081515b143e0f74313f19
[INFO] running `Command { std: "docker" "start" "-a" "9fce4a8e58fbab410fa98b2e86d8cd48e5260e06abe081515b143e0f74313f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9fce4a8e58fbab410fa98b2e86d8cd48e5260e06abe081515b143e0f74313f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fce4a8e58fbab410fa98b2e86d8cd48e5260e06abe081515b143e0f74313f19", kill_on_drop: false }`
[INFO] [stdout] 9fce4a8e58fbab410fa98b2e86d8cd48e5260e06abe081515b143e0f74313f19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c09ebd511b6d3206e7a859022009f86303690f516d1615edaaecfec40e62d578
[INFO] running `Command { std: "docker" "start" "-a" "c09ebd511b6d3206e7a859022009f86303690f516d1615edaaecfec40e62d578", kill_on_drop: false }`
[INFO] [stderr]     Checking ComputerScience v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `max` and `min`
[INFO] [stdout]  --> src/main.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{max, min};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Range`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Range;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:203:73
[INFO] [stdout]     |
[INFO] [stdout] 203 |             let predecessor_idx = if idx % 2 == 0 {(idx / 2) - 1} else {(idx / 2)};
[INFO] [stdout]     |                                                                         ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 203 -             let predecessor_idx = if idx % 2 == 0 {(idx / 2) - 1} else {(idx / 2)};
[INFO] [stdout] 203 +             let predecessor_idx = if idx % 2 == 0 {(idx / 2) - 1} else {idx / 2};
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `max` and `min`
[INFO] [stdout]  --> src/main.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{max, min};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Range`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Range;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:203:73
[INFO] [stdout]     |
[INFO] [stdout] 203 |             let predecessor_idx = if idx % 2 == 0 {(idx / 2) - 1} else {(idx / 2)};
[INFO] [stdout]     |                                                                         ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 203 -             let predecessor_idx = if idx % 2 == 0 {(idx / 2) - 1} else {(idx / 2)};
[INFO] [stdout] 203 +             let predecessor_idx = if idx % 2 == 0 {(idx / 2) - 1} else {idx / 2};
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         for i in 0..capacity {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_node`
[INFO] [stdout]    --> src/main.rs:323:17
[INFO] [stdout]     |
[INFO] [stdout] 323 |             let start_node = adjacent_nodes[0];
[INFO] [stdout]     |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedListItem` is never constructed
[INFO] [stdout]   --> src/main.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct LinkedListItem<'a, T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_link` are never used
[INFO] [stdout]   --> src/main.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl<'a, T> LinkedListItem<'a, T> {
[INFO] [stdout]    | --------------------------------- associated items in this implementation
[INFO] [stdout] 44 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn add_link(&mut self, pointer: &'a LinkedListItem<T>) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Stack` is never constructed
[INFO] [stdout]   --> src/main.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | struct Stack<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `pop` are never used
[INFO] [stdout]   --> src/main.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl<T> Stack<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 77 |     fn new(maxsize: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn push(&mut self, element: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |     fn pop(&mut self) -> T {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Queue` is never constructed
[INFO] [stdout]    --> src/main.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | struct Queue<T>{
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `pop` are never used
[INFO] [stdout]    --> src/main.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 117 | impl<T> Queue<T> {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 118 |     pub fn new(maxsize: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 126 |     fn push(&mut self, item: T) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn pop(&mut self) -> T {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Side` is never used
[INFO] [stdout]    --> src/main.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 | enum Side {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TreeNode` is never constructed
[INFO] [stdout]    --> src/main.rs:156:8
[INFO] [stdout]     |
[INFO] [stdout] 156 | struct TreeNode<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add` are never used
[INFO] [stdout]    --> src/main.rs:163:8
[INFO] [stdout]     |
[INFO] [stdout] 162 | impl<T> TreeNode<T> {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] 163 |     fn new(value:T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 171 |     fn add(&mut self, tree: Box<TreeNode<T>>, side: Side) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MinHeap` is never constructed
[INFO] [stdout]    --> src/main.rs:191:8
[INFO] [stdout]     |
[INFO] [stdout] 191 | struct MinHeap<T> (Vec<T>);
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `remove` are never used
[INFO] [stdout]    --> src/main.rs:195:8
[INFO] [stdout]     |
[INFO] [stdout] 193 | / impl<T> MinHeap<T>
[INFO] [stdout] 194 | | where T : PartialOrd + Copy {
[INFO] [stdout]     | |___________________________- associated items in this implementation
[INFO] [stdout] 195 |       fn new(capacity: usize) -> MinHeap<T> {
[INFO] [stdout]     |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 199 |       fn insert(&mut self, elem: T) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |       fn remove(&mut self, index: usize) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove_connection` is never used
[INFO] [stdout]    --> src/main.rs:295:8
[INFO] [stdout]     |
[INFO] [stdout] 279 | impl BiGraph {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 295 |     fn remove_connection(&mut self, node1:usize, node2:usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:285:12
[INFO] [stdout]     |
[INFO] [stdout] 285 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:285:25
[INFO] [stdout]     |
[INFO] [stdout] 285 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:296:12
[INFO] [stdout]     |
[INFO] [stdout] 296 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:296:25
[INFO] [stdout]     |
[INFO] [stdout] 296 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         for i in 0..capacity {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_node`
[INFO] [stdout]    --> src/main.rs:323:17
[INFO] [stdout]     |
[INFO] [stdout] 323 |             let start_node = adjacent_nodes[0];
[INFO] [stdout]     |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:347:13
[INFO] [stdout]     |
[INFO] [stdout] 347 |         let mut i3 = LinkedListItem::new(27);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:375:13
[INFO] [stdout]     |
[INFO] [stdout] 375 |         let mut t2 = TreeNode::new(10);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:376:13
[INFO] [stdout]     |
[INFO] [stdout] 376 |         let mut t3 = TreeNode::new(7);
[INFO] [stdout]     |             ----^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove_connection` is never used
[INFO] [stdout]    --> src/main.rs:295:8
[INFO] [stdout]     |
[INFO] [stdout] 279 | impl BiGraph {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 295 |     fn remove_connection(&mut self, node1:usize, node2:usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:285:12
[INFO] [stdout]     |
[INFO] [stdout] 285 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:285:25
[INFO] [stdout]     |
[INFO] [stdout] 285 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:296:12
[INFO] [stdout]     |
[INFO] [stdout] 296 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:296:25
[INFO] [stdout]     |
[INFO] [stdout] 296 |         if node1 < 0 || node2 < 0 {
[INFO] [stdout]     |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "c09ebd511b6d3206e7a859022009f86303690f516d1615edaaecfec40e62d578", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c09ebd511b6d3206e7a859022009f86303690f516d1615edaaecfec40e62d578", kill_on_drop: false }`
[INFO] [stdout] c09ebd511b6d3206e7a859022009f86303690f516d1615edaaecfec40e62d578