[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 master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fardfard%2Frustplay" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/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-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ardfard/rustplay on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "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" "+1ef7943ee607160a564655b6596f83670ef95df5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[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 1m 04s
[INFO] running `Command { std: "docker" "inspect" "33ea352ad8989059aaed3af994d0a8e092369bd56850344d20e10f192cb256a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33ea352ad8989059aaed3af994d0a8e092369bd56850344d20e10f192cb256a3", kill_on_drop: false }`
[INFO] [stdout] 33ea352ad8989059aaed3af994d0a8e092369bd56850344d20e10f192cb256a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8a8564cf3594db6905877cfc8b1742b719eb13d3b7d55d6dc635b9ad6376f0b
[INFO] running `Command { std: "docker" "start" "-a" "e8a8564cf3594db6905877cfc8b1742b719eb13d3b7d55d6dc635b9ad6376f0b", 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] [stderr]    Compiling rustplay v0.1.0 (/opt/rustwide/workdir)
[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 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 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 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 0.37s
[INFO] running `Command { std: "docker" "inspect" "e8a8564cf3594db6905877cfc8b1742b719eb13d3b7d55d6dc635b9ad6376f0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8a8564cf3594db6905877cfc8b1742b719eb13d3b7d55d6dc635b9ad6376f0b", kill_on_drop: false }`
[INFO] [stdout] e8a8564cf3594db6905877cfc8b1742b719eb13d3b7d55d6dc635b9ad6376f0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c9ec39f096d17574c8d3253f4a62697f4b9330cfaba5530584326bdebcdfb95b
[INFO] running `Command { std: "docker" "start" "-a" "c9ec39f096d17574c8d3253f4a62697f4b9330cfaba5530584326bdebcdfb95b", 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 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustplay-e27303ab6934e19d)
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test graph::test_graph::test2 ... ok
[INFO] [stdout] test graph::test_graph::test3 ... ok
[INFO] [stdout] test hackerrank::a_very_big_sum::a_very_big_sum_test::test_a_very_big_sum ... ok
[INFO] [stdout] test graph::test_graph::test4 ... 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::tree::test::test ... ok
[INFO] [stdout] test hackerrank::lru::tests::test_lru_cache ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::rc ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::boxes ... ok
[INFO] [stdout] test smart_ptr::tests_smt_ptr::refcell ... ok
[INFO] [stdout] test tests::option_test ... ok
[INFO] [stdout] test tests::as_ref_test ... ok
[INFO] [stdout] test tests::testing ... ok
[INFO] [stdout] test tests::test ... 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' (28) panicked at src/smart_ptr.rs:57:13:
[INFO] [stdout] attempt to add with overflow
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x621206d24052 - std::backtrace_rs::backtrace::libunwind::trace::h786de35fecf3582f
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x621206d24052 - std::backtrace_rs::backtrace::trace_unsynchronized::h4a7da1a2a64387f1
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x621206d24052 - std::sys::backtrace::_print_fmt::h6bd7d500070c788c
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x621206d24052 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6d82c1afff976903
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x621206d33f1f - core::fmt::rt::Argument::fmt::hc4ce6d643d397690
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x621206d33f1f - core::fmt::write::hb1e7ca88b6a3936e
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/fmt/mod.rs:1469:25
[INFO] [stdout]    6:     0x621206cf1853 - std::io::default_write_fmt::haffd49d96f1984a8
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x621206cf1853 - std::io::Write::write_fmt::h027871c57cf57c01
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x621206cfd722 - std::sys::backtrace::BacktraceLock::print::ha2430613ee79d059
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x621206d0237f - std::panicking::default_hook::{{closure}}::hdbd2db9e5c303cf6
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x621206d02211 - std::panicking::default_hook::hed93c70cba5fdcf0
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x621206cc525e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd0ee8b569efc6a07
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   12:     0x621206cc525e - test::test_main_with_exit_callback::{{closure}}::hf10864b576ecd15d
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x621206d0298f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3a55ca34534c0d00
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   14:     0x621206d0298f - std::panicking::panic_with_hook::h3862d766c2cec19b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x621206d027b6 - std::panicking::panic_handler::{{closure}}::hb95eb402b5e28ee1
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:700:13
[INFO] [stdout]   16:     0x621206cfd859 - std::sys::backtrace::__rust_end_short_backtrace::hf73a26dc1835d85a
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x621206ce614d - __rustc[6ed5915ee467787]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x621206d3b990 - core::panicking::panic_fmt::h3454303eb8e6f7cd
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x621206d3b4a7 - core::panicking::panic_const::panic_const_add_overflow::hbf9501b183b61059
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panicking.rs:180:17
[INFO] [stdout]   20:     0x621206ca1743 - rustplay::smart_ptr::tests_smt_ptr::fstest::hbd4ec909d0822634
[INFO] [stdout]                                at /opt/rustwide/workdir/src/smart_ptr.rs:57:13
[INFO] [stdout]   21:     0x621206ca1767 - rustplay::smart_ptr::tests_smt_ptr::fstest::{{closure}}::h95b3e5d1e79245b9
[INFO] [stdout]                                at /opt/rustwide/workdir/src/smart_ptr.rs:55:16
[INFO] [stdout]   22:     0x621206c9bcd6 - core::ops::function::FnOnce::call_once::hb267170468f4985d
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x621206cc503b - core::ops::function::FnOnce::call_once::ha729ee35d2fab541
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x621206cc503b - test::__rust_begin_short_backtrace::ha40f4db8207e1111
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:663:18
[INFO] [stdout]   25:     0x621206cd90bd - test::run_test_in_process::{{closure}}::hc1b77cda5d44f0f3
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:686:74
[INFO] [stdout]   26:     0x621206cd90bd - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1dbea1de64785521
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   27:     0x621206cd90bd - std::panicking::catch_unwind::do_call::hd5febe9affd5a1b3
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:590:40
[INFO] [stdout]   28:     0x621206cd90bd - std::panicking::catch_unwind::h51ea89627559b6f4
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:553:19
[INFO] [stdout]   29:     0x621206cd90bd - std::panic::catch_unwind::hb8b8c2367cae3d66
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x621206cd90bd - test::run_test_in_process::ha5b55801407ea100
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:686:27
[INFO] [stdout]   31:     0x621206cd90bd - test::run_test::{{closure}}::h0b9d4072b527abf5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:607:43
[INFO] [stdout]   32:     0x621206cb25d4 - test::run_test::{{closure}}::hb1056b5731205822
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:637:41
[INFO] [stdout]   33:     0x621206cb25d4 - std::sys::backtrace::__rust_begin_short_backtrace::hb61ff5a34023c7ef
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   34:     0x621206cb5f0a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hb0a83c0e8b353cff
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/thread/mod.rs:562:17
[INFO] [stdout]   35:     0x621206cb5f0a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb4f32cb008535298
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   36:     0x621206cb5f0a - std::panicking::catch_unwind::do_call::h16d110e4fc35789a
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:590:40
[INFO] [stdout]   37:     0x621206cb5f0a - std::panicking::catch_unwind::hea9118f355699c4b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:553:19
[INFO] [stdout]   38:     0x621206cb5f0a - std::panic::catch_unwind::hf4b3c2a06d3f42f5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x621206cb5f0a - std::thread::Builder::spawn_unchecked_::{{closure}}::h3f4cb733a52d53d5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/thread/mod.rs:560:30
[INFO] [stdout]   40:     0x621206cb5f0a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4052f0967b37caeb
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x621206cf8c5f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ec433abd3f148b4
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2085:9
[INFO] [stdout]   42:     0x621206cf8c5f - std::sys::thread::unix::Thread::new::thread_start::he514622d3d7ba65c
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/thread/unix.rs:124:17
[INFO] [stdout]   43:     0x7de5d59ccaa4 - <unknown>
[INFO] [stdout]   44:     0x7de5d5a59a64 - 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" "c9ec39f096d17574c8d3253f4a62697f4b9330cfaba5530584326bdebcdfb95b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9ec39f096d17574c8d3253f4a62697f4b9330cfaba5530584326bdebcdfb95b", kill_on_drop: false }`
[INFO] [stdout] c9ec39f096d17574c8d3253f4a62697f4b9330cfaba5530584326bdebcdfb95b
