[INFO] cloning repository https://github.com/ardfard/rustplay
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ardfard/rustplay" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fardfard%2Frustplay", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fardfard%2Frustplay'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5b2e649b3f4ba25970285c6b902881fd359a22f
[INFO] testing ardfard/rustplay against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fardfard%2Frustplay" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ardfard/rustplay
[INFO] finished tweaking git repo https://github.com/ardfard/rustplay
[INFO] tweaked toml for git repo https://github.com/ardfard/rustplay written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ardfard/rustplay on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ardfard/rustplay 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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22054bfc806ff4e5d1339579787720112630934d25e1d0d05a2e1ed48c1fe86f
[INFO] running `Command { std: "docker" "start" "-a" "22054bfc806ff4e5d1339579787720112630934d25e1d0d05a2e1ed48c1fe86f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22054bfc806ff4e5d1339579787720112630934d25e1d0d05a2e1ed48c1fe86f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22054bfc806ff4e5d1339579787720112630934d25e1d0d05a2e1ed48c1fe86f", kill_on_drop: false }`
[INFO] [stdout] 22054bfc806ff4e5d1339579787720112630934d25e1d0d05a2e1ed48c1fe86f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8fa195d2ea51a9879865daae0947ee6ceda5bb31c87ab3e8d53a77309899c30
[INFO] running `Command { std: "docker" "start" "-a" "e8fa195d2ea51a9879865daae0947ee6ceda5bb31c87ab3e8d53a77309899c30", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling bytes v1.4.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling futures-sink v0.3.28
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling subtle v2.5.0
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling cpufeatures v0.2.7
[INFO] [stderr]    Compiling tracing-core v0.1.31
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling percent-encoding v2.3.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.13
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling base64 v0.21.2
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling http v1.0.0
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling tower-layer v0.3.2
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling anstyle-parse v0.2.0
[INFO] [stderr]    Compiling phf_shared v0.11.1
[INFO] [stderr]    Compiling axum-core v0.4.3
[INFO] [stderr]    Compiling serde_json v1.0.109
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling anstyle-query v1.0.0
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling anstyle v1.0.0
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling phf v0.11.1
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling axum v0.7.4
[INFO] [stderr]    Compiling clap_lex v0.5.0
[INFO] [stderr]    Compiling sync_wrapper v0.1.2
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling matchit v0.7.3
[INFO] [stderr]    Compiling indexmap v2.1.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling mio v0.8.8
[INFO] [stderr]    Compiling socket2 v0.4.9
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling socket2 v0.5.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling sha2 v0.10.6
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling md-5 v0.10.5
[INFO] [stderr]    Compiling http-body v1.0.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling is-terminal v0.4.7
[INFO] [stderr]    Compiling anstream v0.3.2
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]    Compiling clap_derive v4.3.2
[INFO] [stderr]    Compiling clap_builder v4.3.1
[INFO] [stderr]    Compiling postgres-protocol v0.6.5
[INFO] [stderr]    Compiling postgres-types v0.2.5
[INFO] [stderr]    Compiling pin-project v1.1.3
[INFO] [stderr]    Compiling clap v4.3.2
[INFO] [stderr]    Compiling http-body-util v0.1.0
[INFO] [stderr]    Compiling serde_path_to_error v0.1.15
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-util v0.7.8
[INFO] [stderr]    Compiling tower v0.4.13
[INFO] [stderr]    Compiling h2 v0.4.1
[INFO] [stderr]    Compiling tokio-postgres v0.7.8
[INFO] [stderr]    Compiling postgres v0.19.5
[INFO] [stderr]    Compiling hyper v1.1.0
[INFO] [stderr]    Compiling hyper-util v0.1.2
[INFO] [stderr]    Compiling rustplay v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `child_right`
[INFO] [stdout]   --> src/hackerrank/tree.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 let child_right = right.borrow().right.clone();
[INFO] [stdout]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_right`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child_left`
[INFO] [stdout]   --> src/hackerrank/tree.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 let child_left = right.borrow().left.clone();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/graph.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add` is never used
[INFO] [stdout]   --> src/graph.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Node {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 10 |     fn add(&self, val: i64) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare_triplets` is never used
[INFO] [stdout]  --> src/hackerrank/compare_triplets.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn compare_triplets(a: &[i32], b: &[i32]) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_very_big_sum` is never used
[INFO] [stdout]  --> src/hackerrank/a_very_big_sum.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn a_very_big_sum(ar: &[i64]) -> i64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diagonal_difference` is never used
[INFO] [stdout]  --> src/hackerrank/diagonal_difference.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn diagonal_difference(arr: &[Vec<i32>]) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_dups` is never used
[INFO] [stdout]  --> src/hackerrank/remove_dups.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn remove_dups(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_zeroes` is never used
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn move_zeroes(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `rotate` is never used
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 32 |     // rotate the matrix 90 degrees clockwise
[INFO] [stdout] 33 |     pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/lru.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/hackerrank/lru.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Node<V> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `delete` are never used
[INFO] [stdout]   --> src/hackerrank/lru.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<V> Node<V> {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 16 |     fn new(value: V) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn delete(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DoubleLinkedList` is never constructed
[INFO] [stdout]   --> src/hackerrank/lru.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct DoubleLinkedList<V> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `remove`, and `len` are never used
[INFO] [stdout]   --> src/hackerrank/lru.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<V> DoubleLinkedList<V> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] 40 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn add(&mut self, val: V) -> NodeRef<V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn remove(&mut self, node: NodeRef<V>) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRUCache` is never constructed
[INFO] [stdout]   --> src/hackerrank/lru.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | struct LRUCache<K: Eq + Hash, V: Clone> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, and `put` are never used
[INFO] [stdout]    --> src/hackerrank/lru.rs:96:8
[INFO] [stdout]     |
[INFO] [stdout]  95 | impl<K: Eq + Hash + Clone, V: Clone> LRUCache<K,V> {
[INFO] [stdout]     | -------------------------------------------------- associated items in this implementation
[INFO] [stdout]  96 |     fn new(capacity: usize) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     fn get(&mut self, key: &K) -> Option<V> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn put(&mut self, key: K, value: V) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/tree.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ParentNodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/tree.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type ParentNodeRef<V> = Weak<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/hackerrank/tree.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node<V: std::cmp::PartialOrd> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<V: std::cmp::PartialOrd> Node<V> {
[INFO] [stdout]    | ------------------------------------- associated function in this implementation
[INFO] [stdout] 14 |     fn new(
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryTree` is never constructed
[INFO] [stdout]   --> src/hackerrank/tree.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct BinaryTree<V: std::cmp::PartialOrd> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insert_node` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn insert_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `delete_node` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn delete_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `delete` are never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<V: std::cmp::PartialOrd> BinaryTree<V> {
[INFO] [stdout]    | ------------------------------------------- associated items in this implementation
[INFO] [stdout] 69 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn insert(&mut self, value: V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn delete(&mut self, value: V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `numZero` should have a snake case name
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut numZero = 0;
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `num_zero`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `atomic::AtomicUsize` and `borrow::Borrow`
[INFO] [stdout]  --> src/bin/web.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{sync::{Arc, atomic::AtomicUsize}, borrow::Borrow};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 46.38s
[INFO] running `Command { std: "docker" "inspect" "e8fa195d2ea51a9879865daae0947ee6ceda5bb31c87ab3e8d53a77309899c30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8fa195d2ea51a9879865daae0947ee6ceda5bb31c87ab3e8d53a77309899c30", kill_on_drop: false }`
[INFO] [stdout] e8fa195d2ea51a9879865daae0947ee6ceda5bb31c87ab3e8d53a77309899c30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d123c5cccdbcb5e88a3d8ce719dc473626fe3e3b2a485c96ab2b137abedc16e3
[INFO] running `Command { std: "docker" "start" "-a" "d123c5cccdbcb5e88a3d8ce719dc473626fe3e3b2a485c96ab2b137abedc16e3", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `child_right`
[INFO] [stdout]   --> src/hackerrank/tree.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 let child_right = right.borrow().right.clone();
[INFO] [stdout]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_right`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child_left`
[INFO] [stdout]   --> src/hackerrank/tree.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 let child_left = right.borrow().left.clone();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/graph.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add` is never used
[INFO] [stdout]   --> src/graph.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Node {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 10 |     fn add(&self, val: i64) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare_triplets` is never used
[INFO] [stdout]  --> src/hackerrank/compare_triplets.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn compare_triplets(a: &[i32], b: &[i32]) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_very_big_sum` is never used
[INFO] [stdout]  --> src/hackerrank/a_very_big_sum.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn a_very_big_sum(ar: &[i64]) -> i64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diagonal_difference` is never used
[INFO] [stdout]  --> src/hackerrank/diagonal_difference.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn diagonal_difference(arr: &[Vec<i32>]) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_dups` is never used
[INFO] [stdout]  --> src/hackerrank/remove_dups.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn remove_dups(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_zeroes` is never used
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn move_zeroes(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `rotate` is never used
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 32 |     // rotate the matrix 90 degrees clockwise
[INFO] [stdout] 33 |     pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/lru.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/hackerrank/lru.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Node<V> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `delete` are never used
[INFO] [stdout]   --> src/hackerrank/lru.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<V> Node<V> {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 16 |     fn new(value: V) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn delete(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DoubleLinkedList` is never constructed
[INFO] [stdout]   --> src/hackerrank/lru.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct DoubleLinkedList<V> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `remove`, and `len` are never used
[INFO] [stdout]   --> src/hackerrank/lru.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<V> DoubleLinkedList<V> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] 40 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn add(&mut self, val: V) -> NodeRef<V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn remove(&mut self, node: NodeRef<V>) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRUCache` is never constructed
[INFO] [stdout]   --> src/hackerrank/lru.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | struct LRUCache<K: Eq + Hash, V: Clone> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, and `put` are never used
[INFO] [stdout]    --> src/hackerrank/lru.rs:96:8
[INFO] [stdout]     |
[INFO] [stdout]  95 | impl<K: Eq + Hash + Clone, V: Clone> LRUCache<K,V> {
[INFO] [stdout]     | -------------------------------------------------- associated items in this implementation
[INFO] [stdout]  96 |     fn new(capacity: usize) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     fn get(&mut self, key: &K) -> Option<V> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn put(&mut self, key: K, value: V) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/tree.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ParentNodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/tree.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type ParentNodeRef<V> = Weak<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/hackerrank/tree.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node<V: std::cmp::PartialOrd> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<V: std::cmp::PartialOrd> Node<V> {
[INFO] [stdout]    | ------------------------------------- associated function in this implementation
[INFO] [stdout] 14 |     fn new(
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryTree` is never constructed
[INFO] [stdout]   --> src/hackerrank/tree.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct BinaryTree<V: std::cmp::PartialOrd> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insert_node` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn insert_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `delete_node` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn delete_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `delete` are never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<V: std::cmp::PartialOrd> BinaryTree<V> {
[INFO] [stdout]    | ------------------------------------------- associated items in this implementation
[INFO] [stdout] 69 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn insert(&mut self, value: V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn delete(&mut self, value: V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustplay v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `numZero` should have a snake case name
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut numZero = 0;
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `num_zero`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `atomic::AtomicUsize` and `borrow::Borrow`
[INFO] [stdout]  --> src/bin/web.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{sync::{Arc, atomic::AtomicUsize}, borrow::Borrow};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Deref`
[INFO] [stdout]  --> src/smart_ptr.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use std::{cell::RefCell, ops::Deref, rc::Rc};
[INFO] [stdout]   |                              ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `Write`, and `self`
[INFO] [stdout]   --> src/hackerrank/compare_triplets.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use std::io::{self, BufRead, Write};
[INFO] [stdout]    |                   ^^^^  ^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/hackerrank/tree.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     use super::*;  
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `self`
[INFO] [stdout]  --> src/lib.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fs::File, io::{self, Read}, ops::Deref, path::{Display, Path}
[INFO] [stdout]   |                        ^^^^                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg1`
[INFO] [stdout]   --> src/graph.rs:51:29
[INFO] [stdout]    |
[INFO] [stdout] 51 |         pub fn func_a(self, arg1: String) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_arg1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg1`
[INFO] [stdout]   --> src/graph.rs:55:29
[INFO] [stdout]    |
[INFO] [stdout] 55 |         pub fn func_b(self, arg1: String) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_arg1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func_to_var`
[INFO] [stdout]   --> src/graph.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let func_to_var = |arg| {
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func_to_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/graph.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let mut boxed = Box::pin(res);
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/graph.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let slice = NonNull::from(&boxed.data);
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/smart_ptr.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let u = x.borrow();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child_right`
[INFO] [stdout]   --> src/hackerrank/tree.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 let child_right = right.borrow().right.clone();
[INFO] [stdout]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child_left`
[INFO] [stdout]   --> src/hackerrank/tree.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 let child_left = right.borrow().left.clone();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]   --> src/lib.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |         let w = Widget(Some(Data {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o`
[INFO] [stdout]   --> src/lib.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let o = Some(20);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |             let t = s.deref();
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:203:17
[INFO] [stdout]     |
[INFO] [stdout] 203 |             let i = "tai";
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/lib.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let c = Box::new("testing");
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lib.rs:212:13
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let y : [char; 8] = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unmovable` is never constructed
[INFO] [stdout]   --> src/graph.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     struct Unmovable {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/graph.rs:85:11
[INFO] [stdout]    |
[INFO] [stdout] 84 |     impl Unmovable {
[INFO] [stdout]    |     -------------- associated function in this implementation
[INFO] [stdout] 85 |        fn new(data: String) -> Pin<Box<Self>> {
[INFO] [stdout]    |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_dups` is never used
[INFO] [stdout]  --> src/hackerrank/remove_dups.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn remove_dups(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_zeroes` is never used
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn move_zeroes(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Solution {}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `rotate` is never used
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 32 |     // rotate the matrix 90 degrees clockwise
[INFO] [stdout] 33 |     pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/hackerrank/lru.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<V> DoubleLinkedList<V> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 77 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/tree.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ParentNodeRef` is never used
[INFO] [stdout]  --> src/hackerrank/tree.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type ParentNodeRef<V> = Weak<RefCell<Node<V>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/hackerrank/tree.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node<V: std::cmp::PartialOrd> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<V: std::cmp::PartialOrd> Node<V> {
[INFO] [stdout]    | ------------------------------------- associated function in this implementation
[INFO] [stdout] 14 |     fn new(
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryTree` is never constructed
[INFO] [stdout]   --> src/hackerrank/tree.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct BinaryTree<V: std::cmp::PartialOrd> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insert_node` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn insert_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `delete_node` is never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn delete_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `delete` are never used
[INFO] [stdout]   --> src/hackerrank/tree.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<V: std::cmp::PartialOrd> BinaryTree<V> {
[INFO] [stdout]    | ------------------------------------------- associated items in this implementation
[INFO] [stdout] 69 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn insert(&mut self, value: V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn delete(&mut self, value: V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `internal` is never read
[INFO] [stdout]   --> src/lib.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     struct Data {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 44 |         internal: [u8; 4],
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:46:19
[INFO] [stdout]    |
[INFO] [stdout] 46 |     struct Widget(Option<Data>);
[INFO] [stdout]    |            ------ ^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `crunch` is never used
[INFO] [stdout]   --> src/lib.rs:49:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |     impl Data {
[INFO] [stdout]    |     --------- method in this implementation
[INFO] [stdout] 49 |         pub fn crunch(&self) -> i32 {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_data` is never used
[INFO] [stdout]   --> src/lib.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     impl Widget {
[INFO] [stdout]    |     ----------- method in this implementation
[INFO] [stdout] 59 |         fn get_data(&self) -> Option<&Data> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Speak` is never used
[INFO] [stdout]   --> src/lib.rs:72:11
[INFO] [stdout]    |
[INFO] [stdout] 72 |     trait Speak {
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/lib.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     struct Dog;
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Trainer` is never constructed
[INFO] [stdout]   --> src/lib.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     struct Trainer<'a, T: Speak> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `training` is never used
[INFO] [stdout]   --> src/lib.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |     impl<'a, T: Speak> Trainer<'a, T> {
[INFO] [stdout]    |     --------------------------------- method in this implementation
[INFO] [stdout] 89 |         fn training(&self) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Functor` is never used
[INFO] [stdout]    --> src/lib.rs:131:11
[INFO] [stdout]     |
[INFO] [stdout] 131 |     trait Functor: Sized + IsType<Self::Wrapped<Self::Unwrapped>> {
[INFO] [stdout]     |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `convert_inner` is never used
[INFO] [stdout]    --> src/lib.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 |     fn convert_inner<T, B>(wrapped: T) -> T::Wrapped<B>
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Semigroup` is never used
[INFO] [stdout]    --> src/lib.rs:166:11
[INFO] [stdout]     |
[INFO] [stdout] 166 |     trait Semigroup {
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `A` is never constructed
[INFO] [stdout]    --> src/lib.rs:176:12
[INFO] [stdout]     |
[INFO] [stdout] 176 |     struct A;
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `x` is never used
[INFO] [stdout]    --> src/lib.rs:195:16
[INFO] [stdout]     |
[INFO] [stdout] 195 |     static mut x: &str = "taimu";
[INFO] [stdout]     |                ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Deserialize` is never used
[INFO] [stdout]    --> src/lib.rs:216:15
[INFO] [stdout]     |
[INFO] [stdout] 216 |     pub trait Deserialize<'de>: Sized {
[INFO] [stdout]     |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Visitor` is never used
[INFO] [stdout]    --> src/lib.rs:226:15
[INFO] [stdout]     |
[INFO] [stdout] 226 |     pub trait Visitor<'de>: Sized {
[INFO] [stdout]     |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min_end` is never used
[INFO] [stdout]    --> src/lib.rs:249:12
[INFO] [stdout]     |
[INFO] [stdout] 249 |     pub fn min_end(n: i32, y: i32) -> i64 {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `int_to_bin` is never used
[INFO] [stdout]    --> src/lib.rs:265:8
[INFO] [stdout]     |
[INFO] [stdout] 265 |     fn int_to_bin(n : i32) -> [i8;32] {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IsType` is never used
[INFO] [stdout]    --> src/lib.rs:103:19
[INFO] [stdout]     |
[INFO] [stdout] 103 |         pub trait IsType<T: ?Sized>: sealed::IsType<T> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IsType` is never used
[INFO] [stdout]   --> src/lib.rs:98:23
[INFO] [stdout]    |
[INFO] [stdout] 98 |             pub trait IsType<T: ?Sized> {}
[INFO] [stdout]    |                       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/graph.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |         t1.join();
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let _ = t1.join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `numZero` should have a snake case name
[INFO] [stdout]   --> src/hackerrank/remove_dups.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut numZero = 0;
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `num_zero`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `x` should have an upper case name
[INFO] [stdout]    --> src/lib.rs:195:16
[INFO] [stdout]     |
[INFO] [stdout] 195 |     static mut x: &str = "taimu";
[INFO] [stdout]     |                ^ help: convert the identifier to upper case (notice the capitalization): `X`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "d123c5cccdbcb5e88a3d8ce719dc473626fe3e3b2a485c96ab2b137abedc16e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d123c5cccdbcb5e88a3d8ce719dc473626fe3e3b2a485c96ab2b137abedc16e3", kill_on_drop: false }`
[INFO] [stdout] d123c5cccdbcb5e88a3d8ce719dc473626fe3e3b2a485c96ab2b137abedc16e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f94c735d749e29756eb08139c225d3421f039d3b29f2107318a45f77ba24baee
[INFO] running `Command { std: "docker" "start" "-a" "f94c735d749e29756eb08139c225d3421f039d3b29f2107318a45f77ba24baee", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `child_right`
[INFO] [stderr]   --> src/hackerrank/tree.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let child_right = right.borrow().right.clone();
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_right`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child_left`
[INFO] [stderr]   --> src/hackerrank/tree.rs:59:21
[INFO] [stderr]    |
[INFO] [stderr] 59 |                 let child_left = right.borrow().left.clone();
[INFO] [stderr]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_left`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> src/graph.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Node {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `add` is never used
[INFO] [stderr]   --> src/graph.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr]  9 | impl Node {
[INFO] [stderr]    | --------- method in this implementation
[INFO] [stderr] 10 |     fn add(&self, val: i64) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `compare_triplets` is never used
[INFO] [stderr]  --> src/hackerrank/compare_triplets.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn compare_triplets(a: &[i32], b: &[i32]) -> Vec<i32> {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `a_very_big_sum` is never used
[INFO] [stderr]  --> src/hackerrank/a_very_big_sum.rs:2:4
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn a_very_big_sum(ar: &[i64]) -> i64 {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `diagonal_difference` is never used
[INFO] [stderr]  --> src/hackerrank/diagonal_difference.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn diagonal_difference(arr: &[Vec<i32>]) -> i32 {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `remove_dups` is never used
[INFO] [stderr]  --> src/hackerrank/remove_dups.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn remove_dups(nums: &mut Vec<i32>) -> i32 {
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `move_zeroes` is never used
[INFO] [stderr]   --> src/hackerrank/remove_dups.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn move_zeroes(nums: &mut Vec<i32>) -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Solution` is never constructed
[INFO] [stderr]   --> src/hackerrank/remove_dups.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct Solution {}
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `rotate` is never used
[INFO] [stderr]   --> src/hackerrank/remove_dups.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl Solution {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 32 |     // rotate the matrix 90 degrees clockwise
[INFO] [stderr] 33 |     pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `NodeRef` is never used
[INFO] [stderr]  --> src/hackerrank/lru.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stderr]   |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> src/hackerrank/lru.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct Node<V> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `delete` are never used
[INFO] [stderr]   --> src/hackerrank/lru.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | impl<V> Node<V> {
[INFO] [stderr]    | --------------- associated items in this implementation
[INFO] [stderr] 16 |     fn new(value: V) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 |     fn delete(&mut self) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `DoubleLinkedList` is never constructed
[INFO] [stderr]   --> src/hackerrank/lru.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct DoubleLinkedList<V> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add`, `remove`, and `len` are never used
[INFO] [stderr]   --> src/hackerrank/lru.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | impl<V> DoubleLinkedList<V> {
[INFO] [stderr]    | --------------------------- associated items in this implementation
[INFO] [stderr] 40 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 44 |     fn add(&mut self, val: V) -> NodeRef<V> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 61 |     fn remove(&mut self, node: NodeRef<V>) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 77 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LRUCache` is never constructed
[INFO] [stderr]   --> src/hackerrank/lru.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 | struct LRUCache<K: Eq + Hash, V: Clone> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `get`, and `put` are never used
[INFO] [stderr]    --> src/hackerrank/lru.rs:96:8
[INFO] [stderr]     |
[INFO] [stderr]  95 | impl<K: Eq + Hash + Clone, V: Clone> LRUCache<K,V> {
[INFO] [stderr]     | -------------------------------------------------- associated items in this implementation
[INFO] [stderr]  96 |     fn new(capacity: usize) -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |     fn get(&mut self, key: &K) -> Option<V> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 116 |     fn put(&mut self, key: K, value: V) {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `NodeRef` is never used
[INFO] [stderr]  --> src/hackerrank/tree.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 | type NodeRef<V> = Rc<RefCell<Node<V>>>;
[INFO] [stderr]   |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `ParentNodeRef` is never used
[INFO] [stderr]  --> src/hackerrank/tree.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 | type ParentNodeRef<V> = Weak<RefCell<Node<V>>>;
[INFO] [stderr]   |      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> src/hackerrank/tree.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Node<V: std::cmp::PartialOrd> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/hackerrank/tree.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl<V: std::cmp::PartialOrd> Node<V> {
[INFO] [stderr]    | ------------------------------------- associated function in this implementation
[INFO] [stderr] 14 |     fn new(
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BinaryTree` is never constructed
[INFO] [stderr]   --> src/hackerrank/tree.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | struct BinaryTree<V: std::cmp::PartialOrd> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `insert_node` is never used
[INFO] [stderr]   --> src/hackerrank/tree.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn insert_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `delete_node` is never used
[INFO] [stderr]   --> src/hackerrank/tree.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn delete_node<V: std::cmp::PartialOrd>(value: V, node: NodeRef<V>) {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `insert`, and `delete` are never used
[INFO] [stderr]   --> src/hackerrank/tree.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 68 | impl<V: std::cmp::PartialOrd> BinaryTree<V> {
[INFO] [stderr]    | ------------------------------------------- associated items in this implementation
[INFO] [stderr] 69 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 73 |     fn insert(&mut self, value: V) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 85 |     fn delete(&mut self, value: V) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `numZero` should have a snake case name
[INFO] [stderr]   --> src/hackerrank/remove_dups.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut numZero = 0;
[INFO] [stderr]    |             ^^^^^^^ help: convert the identifier to snake case: `num_zero`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ops::Deref`
[INFO] [stderr]  --> src/smart_ptr.rs:3:30
[INFO] [stderr]   |
[INFO] [stderr] 3 |     use std::{cell::RefCell, ops::Deref, rc::Rc};
[INFO] [stderr]   |                              ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `Write`, and `self`
[INFO] [stderr]   --> src/hackerrank/compare_triplets.rs:19:19
[INFO] [stderr]    |
[INFO] [stderr] 19 |     use std::io::{self, BufRead, Write};
[INFO] [stderr]    |                   ^^^^  ^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/hackerrank/tree.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |     use super::*;  
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Display` and `self`
[INFO] [stderr]  --> src/lib.rs:9:24
[INFO] [stderr]   |
[INFO] [stderr] 9 |         fs::File, io::{self, Read}, ops::Deref, path::{Display, Path}
[INFO] [stderr]   |                        ^^^^                            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg1`
[INFO] [stderr]   --> src/graph.rs:51:29
[INFO] [stderr]    |
[INFO] [stderr] 51 |         pub fn func_a(self, arg1: String) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_arg1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg1`
[INFO] [stderr]   --> src/graph.rs:55:29
[INFO] [stderr]    |
[INFO] [stderr] 55 |         pub fn func_b(self, arg1: String) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_arg1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `func_to_var`
[INFO] [stderr]   --> src/graph.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let func_to_var = |arg| {
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func_to_var`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |         let mut boxed = Box::pin(res);
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slice`
[INFO] [stderr]   --> src/graph.rs:92:13
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let slice = NonNull::from(&boxed.data);
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/smart_ptr.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let u = x.borrow();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child_right`
[INFO] [stderr]   --> src/hackerrank/tree.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let child_right = right.borrow().right.clone();
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_child_right`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `w`
[INFO] [stderr]   --> src/lib.rs:66:13
[INFO] [stderr]    |
[INFO] [stderr] 66 |         let w = Widget(Some(Data {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `o`
[INFO] [stderr]   --> src/lib.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let o = Some(20);
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/lib.rs:202:17
[INFO] [stderr]     |
[INFO] [stderr] 202 |             let t = s.deref();
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:203:17
[INFO] [stderr]     |
[INFO] [stderr] 203 |             let i = "tai";
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]    --> src/lib.rs:211:13
[INFO] [stderr]     |
[INFO] [stderr] 211 |         let c = Box::new("testing");
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/lib.rs:212:13
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let y : [char; 8] = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Unmovable` is never constructed
[INFO] [stderr]   --> src/graph.rs:78:12
[INFO] [stderr]    |
[INFO] [stderr] 78 |     struct Unmovable {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/graph.rs:85:11
[INFO] [stderr]    |
[INFO] [stderr] 84 |     impl Unmovable {
[INFO] [stderr]    |     -------------- associated function in this implementation
[INFO] [stderr] 85 |        fn new(data: String) -> Pin<Box<Self>> {
[INFO] [stderr]    |           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `len` is never used
[INFO] [stderr]   --> src/hackerrank/lru.rs:77:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | impl<V> DoubleLinkedList<V> {
[INFO] [stderr]    | --------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 77 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `internal` is never read
[INFO] [stderr]   --> src/lib.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     struct Data {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] 44 |         internal: [u8; 4],
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/lib.rs:46:19
[INFO] [stderr]    |
[INFO] [stderr] 46 |     struct Widget(Option<Data>);
[INFO] [stderr]    |            ------ ^^^^^^^^^^^^
[INFO] [stderr]    |            |
[INFO] [stderr]    |            field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr] 
[INFO] [stderr] warning: method `crunch` is never used
[INFO] [stderr]   --> src/lib.rs:49:16
[INFO] [stderr]    |
[INFO] [stderr] 48 |     impl Data {
[INFO] [stderr]    |     --------- method in this implementation
[INFO] [stderr] 49 |         pub fn crunch(&self) -> i32 {
[INFO] [stderr]    |                ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_data` is never used
[INFO] [stderr]   --> src/lib.rs:59:12
[INFO] [stderr]    |
[INFO] [stderr] 58 |     impl Widget {
[INFO] [stderr]    |     ----------- method in this implementation
[INFO] [stderr] 59 |         fn get_data(&self) -> Option<&Data> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Speak` is never used
[INFO] [stderr]   --> src/lib.rs:72:11
[INFO] [stderr]    |
[INFO] [stderr] 72 |     trait Speak {
[INFO] [stderr]    |           ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Dog` is never constructed
[INFO] [stderr]   --> src/lib.rs:76:12
[INFO] [stderr]    |
[INFO] [stderr] 76 |     struct Dog;
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Trainer` is never constructed
[INFO] [stderr]   --> src/lib.rs:84:12
[INFO] [stderr]    |
[INFO] [stderr] 84 |     struct Trainer<'a, T: Speak> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `training` is never used
[INFO] [stderr]   --> src/lib.rs:89:12
[INFO] [stderr]    |
[INFO] [stderr] 88 |     impl<'a, T: Speak> Trainer<'a, T> {
[INFO] [stderr]    |     --------------------------------- method in this implementation
[INFO] [stderr] 89 |         fn training(&self) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Functor` is never used
[INFO] [stderr]    --> src/lib.rs:131:11
[INFO] [stderr]     |
[INFO] [stderr] 131 |     trait Functor: Sized + IsType<Self::Wrapped<Self::Unwrapped>> {
[INFO] [stderr]     |           ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `convert_inner` is never used
[INFO] [stderr]    --> src/lib.rs:158:8
[INFO] [stderr]     |
[INFO] [stderr] 158 |     fn convert_inner<T, B>(wrapped: T) -> T::Wrapped<B>
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Semigroup` is never used
[INFO] [stderr]    --> src/lib.rs:166:11
[INFO] [stderr]     |
[INFO] [stderr] 166 |     trait Semigroup {
[INFO] [stderr]     |           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `A` is never constructed
[INFO] [stderr]    --> src/lib.rs:176:12
[INFO] [stderr]     |
[INFO] [stderr] 176 |     struct A;
[INFO] [stderr]     |            ^
[INFO] [stderr] 
[INFO] [stderr] warning: static `x` is never used
[INFO] [stderr]    --> src/lib.rs:195:16
[INFO] [stderr]     |
[INFO] [stderr] 195 |     static mut x: &str = "taimu";
[INFO] [stderr]     |                ^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Deserialize` is never used
[INFO] [stderr]    --> src/lib.rs:216:15
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub trait Deserialize<'de>: Sized {
[INFO] [stderr]     |               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Visitor` is never used
[INFO] [stderr]    --> src/lib.rs:226:15
[INFO] [stderr]     |
[INFO] [stderr] 226 |     pub trait Visitor<'de>: Sized {
[INFO] [stderr]     |               ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `min_end` is never used
[INFO] [stderr]    --> src/lib.rs:249:12
[INFO] [stderr]     |
[INFO] [stderr] 249 |     pub fn min_end(n: i32, y: i32) -> i64 {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `int_to_bin` is never used
[INFO] [stderr]    --> src/lib.rs:265:8
[INFO] [stderr]     |
[INFO] [stderr] 265 |     fn int_to_bin(n : i32) -> [i8;32] {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `IsType` is never used
[INFO] [stderr]    --> src/lib.rs:103:19
[INFO] [stderr]     |
[INFO] [stderr] 103 |         pub trait IsType<T: ?Sized>: sealed::IsType<T> {
[INFO] [stderr]     |                   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `IsType` is never used
[INFO] [stderr]   --> src/lib.rs:98:23
[INFO] [stderr]    |
[INFO] [stderr] 98 |             pub trait IsType<T: ?Sized> {}
[INFO] [stderr]    |                       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/graph.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         t1.join();
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 40 |         let _ = t1.join();
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `x` should have an upper case name
[INFO] [stderr]    --> src/lib.rs:195:16
[INFO] [stderr]     |
[INFO] [stderr] 195 |     static mut x: &str = "taimu";
[INFO] [stderr]     |                ^ help: convert the identifier to upper case (notice the capitalization): `X`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rustplay` (lib) generated 27 warnings (run `cargo fix --lib -p rustplay` to apply 2 suggestions)
[INFO] [stderr] warning: `rustplay` (lib test) generated 55 warnings (14 duplicates) (run `cargo fix --lib -p rustplay --tests` to apply 18 suggestions)
[INFO] [stderr] warning: unused imports: `atomic::AtomicUsize` and `borrow::Borrow`
[INFO] [stderr]  --> src/bin/web.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{sync::{Arc, atomic::AtomicUsize}, borrow::Borrow};
[INFO] [stderr]   |                       ^^^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rustplay` (bin "web" test) generated 1 warning (run `cargo fix --bin "web" -p rustplay --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustplay-1e4800307058a844)
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test graph::test_graph::test4 ... ok
[INFO] [stdout] test graph::test_graph::test2 ... ok
[INFO] [stdout] test graph::test_graph::test3 ... ok
[INFO] [stdout] test hackerrank::compare_triplets::compare_triplets_test::test_compare_triplets ... ok
[INFO] [stdout] test graph::test_graph::test ... ok
[INFO] [stdout] test hackerrank::diagonal_difference::diagonal_difference_test::test_diagonal_difference ... ok
[INFO] [stdout] test hackerrank::a_very_big_sum::a_very_big_sum_test::test_a_very_big_sum ... ok
[INFO] [stdout] test hackerrank::lru::tests::test_lru_cache ... ok
[INFO] [stdout] test hackerrank::tree::test::test ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::boxes ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::rc ... ok
[INFO] [stdout] test tests::option_test ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::refcell ... ok
[INFO] [stdout] test tests::as_ref_test ... ok
[INFO] [stdout] test tests::test ... ok
[INFO] [stdout] test tests::testing ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::fstest ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- smart_ptr::tests_smt_ptr::fstest stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'smart_ptr::tests_smt_ptr::fstest' (36) panicked at src/smart_ptr.rs:57:13:
[INFO] [stdout] attempt to add with overflow
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5b17f23a6752 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5b17f23a6752 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::trace_unsynchronized::<std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5b17f23a6752 - std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5b17f23a6752 - <<std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[585f66e14d78f9ba]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5b17f23bafca - <core[585f66e14d78f9ba]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5b17f23bafca - core[585f66e14d78f9ba]::fmt::write
[INFO] [stdout]    6:     0x5b17f23ab576 - std[3f03f8b59f91bef1]::io::default_write_fmt::<alloc[15e7b27aba85d2e2]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5b17f23ab576 - <alloc[15e7b27aba85d2e2]::vec::Vec<u8> as std[3f03f8b59f91bef1]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5b17f2384d6f - <std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5b17f2384d6f - std[3f03f8b59f91bef1]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5b17f239ea89 - std[3f03f8b59f91bef1]::panicking::default_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5b17f233a33e - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x5b17f233a33e - test[30224e0cb089acd2]::test_main_with_exit_callback::<test[30224e0cb089acd2]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5b17f239ec42 - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x5b17f239ec42 - std[3f03f8b59f91bef1]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5b17f2384e5a - std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x5b17f237a019 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_end_short_backtrace::<std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5b17f2385c7d - __rustc[caa99d26c7bae192]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5b17f23bb70c - core[585f66e14d78f9ba]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5b17f23bc6e9 - core[585f66e14d78f9ba]::panicking::panic_const::panic_const_add_overflow
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:175:17
[INFO] [stdout]   20:     0x5b17f231fdff - rustplay[28762bd21613131b]::smart_ptr::tests_smt_ptr::fstest
[INFO] [stdout]                                at /opt/rustwide/workdir/src/smart_ptr.rs:57:13
[INFO] [stdout]   21:     0x5b17f231e4b7 - rustplay[28762bd21613131b]::smart_ptr::tests_smt_ptr::fstest::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/smart_ptr.rs:55:16
[INFO] [stdout]   22:     0x5b17f2321956 - <rustplay[28762bd21613131b]::smart_ptr::tests_smt_ptr::fstest::{closure#0} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5b17f232e6eb - <fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5b17f232e6eb - test[30224e0cb089acd2]::__rust_begin_short_backtrace::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:663:18
[INFO] [stdout]   25:     0x5b17f233af4a - test[30224e0cb089acd2]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:74
[INFO] [stdout]   26:     0x5b17f233af4a - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   27:     0x5b17f233af4a - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   28:     0x5b17f233af4a - std[3f03f8b59f91bef1]::panicking::catch_unwind::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   29:     0x5b17f233af4a - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x5b17f233af4a - test[30224e0cb089acd2]::run_test_in_process
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:27
[INFO] [stdout]   31:     0x5b17f233af4a - test[30224e0cb089acd2]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:607:43
[INFO] [stdout]   32:     0x5b17f2335414 - test[30224e0cb089acd2]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:637:41
[INFO] [stdout]   33:     0x5b17f2335414 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_begin_short_backtrace::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   34:     0x5b17f233da42 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   35:     0x5b17f233da42 - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   36:     0x5b17f233da42 - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   37:     0x5b17f233da42 - std[3f03f8b59f91bef1]::panicking::catch_unwind::<(), core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   38:     0x5b17f233da42 - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x5b17f233da42 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   40:     0x5b17f233da42 - <std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5b17f23a5fff - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn core[585f66e14d78f9ba]::ops::function::FnOnce<(), Output = ()> + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   42:     0x5b17f23a5fff - <std[3f03f8b59f91bef1]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/thread/unix.rs:119:17
[INFO] [stdout]   43:     0x79d2e015daa4 - <unknown>
[INFO] [stdout]   44:     0x79d2e01eaa64 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     smart_ptr::tests_smt_ptr::fstest
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 16 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "f94c735d749e29756eb08139c225d3421f039d3b29f2107318a45f77ba24baee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f94c735d749e29756eb08139c225d3421f039d3b29f2107318a45f77ba24baee", kill_on_drop: false }`
[INFO] [stdout] f94c735d749e29756eb08139c225d3421f039d3b29f2107318a45f77ba24baee
