[INFO] cloning repository https://github.com/Ez-FlawLess/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ez-FlawLess/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEz-FlawLess%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEz-FlawLess%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dcc803db8fa14db9435625b8f0402df99b78be19
[INFO] checking Ez-FlawLess/rust-playground against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-150727
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEz-FlawLess%2Frust-playground" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ez-FlawLess/rust-playground
[INFO] finished tweaking git repo https://github.com/Ez-FlawLess/rust-playground
[INFO] tweaked toml for git repo https://github.com/Ez-FlawLess/rust-playground written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ez-FlawLess/rust-playground on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ez-FlawLess/rust-playground 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d64bc548c0c89e392df38ae53016db394aa4c10bb335a207b35014c05e4d5c5d
[INFO] running `Command { std: "docker" "start" "-a" "d64bc548c0c89e392df38ae53016db394aa4c10bb335a207b35014c05e4d5c5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d64bc548c0c89e392df38ae53016db394aa4c10bb335a207b35014c05e4d5c5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d64bc548c0c89e392df38ae53016db394aa4c10bb335a207b35014c05e4d5c5d", kill_on_drop: false }`
[INFO] [stdout] d64bc548c0c89e392df38ae53016db394aa4c10bb335a207b35014c05e4d5c5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ee2e8b817ea989784d2aba76ffcd617077815703b59de15492e4315c0dfde83
[INFO] running `Command { std: "docker" "start" "-a" "6ee2e8b817ea989784d2aba76ffcd617077815703b59de15492e4315c0dfde83", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking parking_lot_core v0.9.11
[INFO] [stderr]     Checking proc-macro2 v1.0.95
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking pg_macros v0.1.0 (/opt/rustwide/workdir/pg_macros)
[INFO] [stdout] warning: unused macro definition: `error`
[INFO] [stdout]  --> pg_macros/src/utils.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! error {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error`
[INFO] [stdout]  --> pg_macros/src/utils.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) use error;
[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 macro definition: `error`
[INFO] [stdout]  --> pg_macros/src/utils.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! error {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error`
[INFO] [stdout]  --> pg_macros/src/utils.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) use error;
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stdout] warning: unused macro definition: `error`
[INFO] [stdout]  --> pg_macros/src/utils.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! error {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error`
[INFO] [stdout]  --> pg_macros/src/utils.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) use error;
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio v1.46.1
[INFO] [stderr]     Checking pg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Arc`
[INFO] [stdout]  --> src/my_arc.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |         Arc,
[INFO] [stdout]   |         ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryTree` is never constructed
[INFO] [stdout]  --> src/binary_tree.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct BinaryTree<T>(Option<Node<T>>);
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NextNode` is never used
[INFO] [stdout]  --> src/binary_tree.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type NextNode<T> = Option<Box<Node<T>>>;
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/binary_tree.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `exists` are never used
[INFO] [stdout]   --> src/binary_tree.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | / impl<T> BinaryTree<T>
[INFO] [stdout] 14 | | where
[INFO] [stdout] 15 | |     T: Ord,
[INFO] [stdout]    | |___________- associated items in this implementation
[INFO] [stdout] 16 |   {
[INFO] [stdout] 17 |       pub fn new() -> Self {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |       pub fn push(&mut self, value: T) {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |       pub fn exists(&self, value: T) -> bool {
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `exists` are never used
[INFO] [stdout]   --> src/binary_tree.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | / impl<T> Node<T>
[INFO] [stdout] 34 | | where
[INFO] [stdout] 35 | |     T: Ord,
[INFO] [stdout]    | |___________- associated items in this implementation
[INFO] [stdout] 36 |   {
[INFO] [stdout] 37 |       fn new(value: T) -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |       fn push(&mut self, value: T) {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |       fn exists(&self, value: T) -> bool {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArcData` is never constructed
[INFO] [stdout]   --> src/my_arc.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct ArcData<T> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Arc`
[INFO] [stdout]  --> src/my_arc.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |         Arc,
[INFO] [stdout]   |         ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyArc` is never constructed
[INFO] [stdout]   --> src/my_arc.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct MyArc<T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `data` are never used
[INFO] [stdout]   --> src/my_arc.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> MyArc<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 28 |     pub fn new(data: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn data(&self) -> &ArcData<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Weak` is never constructed
[INFO] [stdout]   --> src/my_arc.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub struct Weak<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `data` and `upgrade` are never used
[INFO] [stdout]   --> src/my_arc.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | impl<T> Weak<T> {
[INFO] [stdout]    | --------------- methods in this implementation
[INFO] [stdout] 79 |     fn data(&self) -> &ArcData<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn upgrade(&self) -> Option<MyArc<T>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]   --> src/my_channel.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Channel<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, and `receive` are never used
[INFO] [stdout]   --> src/my_channel.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn send(&self, message: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn receive(&self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OneshotChannel` is never constructed
[INFO] [stdout]   --> src/my_channel.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct OneshotChannel<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, `is_ready`, and `receive` are never used
[INFO] [stdout]   --> src/my_channel.rs:48:18
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl<T> OneshotChannel<T> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 48 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub unsafe fn send(&self, message: T) {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub unsafe fn receive(&self) -> T {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyLinkedList` is never constructed
[INFO] [stdout]  --> src/my_linked_list.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct MyLinkedList<T>{
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyNode` is never constructed
[INFO] [stdout]  --> src/my_linked_list.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct MyNode<T>{
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `pop`, and `get` are never used
[INFO] [stdout]   --> src/my_linked_list.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T> MyLinkedList<T> {
[INFO] [stdout]    | ----------------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn push(&mut self, data: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn get(&self, index: usize) -> Option<&T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push_next`, `pop_next`, and `get` are never used
[INFO] [stdout]    --> src/my_linked_list.rs:63:8
[INFO] [stdout]     |
[INFO] [stdout]  62 | impl<T> MyNode<T> {
[INFO] [stdout]     | ----------------- associated items in this implementation
[INFO] [stdout]  63 |     fn new(data: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  70 |     fn push_next(&mut self, data: T) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  81 |     fn pop_next(&mut self) -> Option<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn get(&self, index: usize) -> Option<&T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyVec` is never constructed
[INFO] [stdout]  --> src/my_vec.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct MyVec<T> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DEFAULT_CAPACITY` is never used
[INFO] [stdout]   --> src/my_vec.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const DEFAULT_CAPACITY: usize = 5;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `initial_layout`, `new`, `push`, `pop`, `get`, and `len` are never used
[INFO] [stdout]   --> src/my_vec.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> MyVec<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 13 |     fn initial_layout() -> Layout {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn push(&mut self, item: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn get(&self, index: usize) -> Option<&T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SpinLock` is never constructed
[INFO] [stdout]  --> src/spin_lock.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct SpinLock<T> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `lock`, and `unlock` are never used
[INFO] [stdout]   --> src/spin_lock.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> SpinLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn lock(&self) -> Gaurd<'_, T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn unlock(&self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Gaurd` is never constructed
[INFO] [stdout]   --> src/spin_lock.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct Gaurd<'a, T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VoidPtr` is never constructed
[INFO] [stdout]  --> src/void_ptr.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct VoidPtr<T>(*mut std::ffi::c_void, PhantomData<T>);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/void_ptr.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl<T> VoidPtr<T> {
[INFO] [stdout]   | ------------------ associated function in this implementation
[INFO] [stdout] 7 |     fn new(x: T) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `num` is assigned to, but never used
[INFO] [stdout]   --> src/closures.rs:61:21
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let plus = |mut num: u32| num += 1;
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_num` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `num` is never read
[INFO] [stdout]   --> src/closures.rs:61:35
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let plus = |mut num: u32| num += 1;
[INFO] [stdout]    |                                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `plus`
[INFO] [stdout]   --> src/closures.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let plus = |mut num: u32| num += 1;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `life`
[INFO] [stdout]   --> src/closures.rs:73:15
[INFO] [stdout]    |
[INFO] [stdout] 73 |         Some(|life: Life<'_>| {})
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_life`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]    --> src/test_allocator.rs:120:17
[INFO] [stdout]     |
[INFO] [stdout] 120 |             let item = Box::new(5);
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Life` is never constructed
[INFO] [stdout]   --> src/closures.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     struct Life<'a>(&'a mut [u8]);
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `push` is never used
[INFO] [stdout]   --> src/closures.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn push() -> Option<impl FnMut(Life)> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `upgrade` is never used
[INFO] [stdout]   --> src/my_arc.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | impl<T> Weak<T> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn upgrade(&self) -> Option<MyArc<T>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]   --> src/my_channel.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Channel<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, and `receive` are never used
[INFO] [stdout]   --> src/my_channel.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn send(&self, message: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn receive(&self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OneshotChannel` is never constructed
[INFO] [stdout]   --> src/my_channel.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct OneshotChannel<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, `is_ready`, and `receive` are never used
[INFO] [stdout]   --> src/my_channel.rs:48:18
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl<T> OneshotChannel<T> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 48 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub unsafe fn send(&self, message: T) {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub unsafe fn receive(&self) -> T {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `TESTING` is never used
[INFO] [stdout]   --> src/test_allocator.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | static TESTING: AtomicBool = AtomicBool::new(false);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.08s
[INFO] running `Command { std: "docker" "inspect" "6ee2e8b817ea989784d2aba76ffcd617077815703b59de15492e4315c0dfde83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ee2e8b817ea989784d2aba76ffcd617077815703b59de15492e4315c0dfde83", kill_on_drop: false }`
[INFO] [stdout] 6ee2e8b817ea989784d2aba76ffcd617077815703b59de15492e4315c0dfde83