[INFO] cloning repository https://github.com/preinpost/Rust-Atomics-and-Locks-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/preinpost/Rust-Atomics-and-Locks-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreinpost%2FRust-Atomics-and-Locks-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreinpost%2FRust-Atomics-and-Locks-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ff5f184fcef667451e6c7bbcd576897ebbf3faf
[INFO] checking preinpost/Rust-Atomics-and-Locks-code against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreinpost%2FRust-Atomics-and-Locks-code" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/preinpost/Rust-Atomics-and-Locks-code on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/preinpost/Rust-Atomics-and-Locks-code
[INFO] finished tweaking git repo https://github.com/preinpost/Rust-Atomics-and-Locks-code
[INFO] tweaked toml for git repo https://github.com/preinpost/Rust-Atomics-and-Locks-code written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/preinpost/Rust-Atomics-and-Locks-code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 394495f477f030b401488fed39e17b3f16ea90ceef7153fc10358f5060614d7f
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[INFO] running `Command { std: "docker" "inspect" "394495f477f030b401488fed39e17b3f16ea90ceef7153fc10358f5060614d7f", kill_on_drop: false }`
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[INFO] [stdout] 394495f477f030b401488fed39e17b3f16ea90ceef7153fc10358f5060614d7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13a6c9d5a473e82b9fde5aace54d9ccc116e17744604c54d4e71f10bfc3def5c
[INFO] running `Command { std: "docker" "start" "-a" "13a6c9d5a473e82b9fde5aace54d9ccc116e17744604c54d4e71f10bfc3def5c", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `example3`, `example4`, and `fetch_add_example`
[INFO] [stdout]  --> src/main.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::ch2::atomic::{example3, example4, fetch_add_example};
[INFO] [stdout]   |                          ^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ch5::channel::safe_channel::run`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::ch5::channel::safe_channel::run;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ch5::channel::safe_channel_without_arc::run3`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::ch5::channel::safe_channel_without_arc::run3;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `example3`, `example4`, and `fetch_add_example`
[INFO] [stdout]  --> src/main.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::ch2::atomic::{example3, example4, fetch_add_example};
[INFO] [stdout]   |                          ^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ch5::channel::safe_channel::run`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::ch5::channel::safe_channel::run;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ch5::channel::safe_channel_without_arc::run3`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::ch5::channel::safe_channel_without_arc::run3;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Release`
[INFO] [stdout]   --> src/ch6/arc.rs:77:48
[INFO] [stdout]    |
[INFO] [stdout] 77 |     use std::sync::atomic::Ordering::{Relaxed, Release};
[INFO] [stdout]    |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/ch2/atomic.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         for t in 0..4 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/ch2/atomic.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         for t in 0..4 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `thread_parking` is never used
[INFO] [stdout]  --> src/ch1/thread_parking.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn thread_parking() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn example1() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example2` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn example2() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example3` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn example3() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fetch_add_example` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn fetch_add_example() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example4` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub fn example4() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_item` is never used
[INFO] [stdout]    --> src/ch2/atomic.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn process_item(i: usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `in_use` is never read
[INFO] [stdout]   --> src/ch5/channel.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 8  |     pub struct Channel<T> {
[INFO] [stdout]    |                ------- field in this struct
[INFO] [stdout] 9  |         message: UnsafeCell<MaybeUninit<T>>,
[INFO] [stdout] 10 |         in_use: AtomicBool,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, `is_ready`, and `receive` are never used
[INFO] [stdout]   --> src/ch5/channel.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 16 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 17 |         pub const fn new() -> Self {
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run1` is never used
[INFO] [stdout]   --> src/ch5/channel.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn run1() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]   --> src/ch5/channel.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     struct Channel<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]   --> src/ch5/channel.rs:83:16
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub struct Sender<T> {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]   --> src/ch5/channel.rs:87:16
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub struct Receiver<T> {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]   --> src/ch5/channel.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 101 |     impl<T> Sender<T> {
[INFO] [stdout]     |     ----------------- method in this implementation
[INFO] [stdout] 102 |         pub fn send(self, message: T) {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_ready` and `receive` are never used
[INFO] [stdout]    --> src/ch5/channel.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 108 |     impl<T> Receiver<T> {
[INFO] [stdout]     |     ------------------- methods in this implementation
[INFO] [stdout] 109 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:129:12
[INFO] [stdout]     |
[INFO] [stdout] 129 |     pub fn run() {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]    --> src/ch5/channel.rs:162:16
[INFO] [stdout]     |
[INFO] [stdout] 162 |     pub struct Sender<'a, T> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]    --> src/ch5/channel.rs:166:16
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub struct Receiver<'a, T> {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `split` are never used
[INFO] [stdout]    --> src/ch5/channel.rs:171:22
[INFO] [stdout]     |
[INFO] [stdout] 170 |     impl<T> Channel<T> {
[INFO] [stdout]     |     ------------------ associated items in this implementation
[INFO] [stdout] 171 |         pub const fn new() -> Self {
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |         pub fn split<'a>(&'a mut self) -> (Sender<'a, T>, Receiver<'a, T>) {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:185:16
[INFO] [stdout]     |
[INFO] [stdout] 184 |     impl<T> Sender<'_, T> {
[INFO] [stdout]     |     --------------------- method in this implementation
[INFO] [stdout] 185 |         pub fn send(self, message: T) {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_ready` and `receive` are never used
[INFO] [stdout]    --> src/ch5/channel.rs:192:16
[INFO] [stdout]     |
[INFO] [stdout] 191 |     impl<T> Receiver<'_, T> {
[INFO] [stdout]     |     ----------------------- methods in this implementation
[INFO] [stdout] 192 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run3` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:212:12
[INFO] [stdout]     |
[INFO] [stdout] 212 |     pub fn run3() {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_ready` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:265:16
[INFO] [stdout]     |
[INFO] [stdout] 264 |     impl<T> Receiver<'_, T> {
[INFO] [stdout]     |     ----------------------- method in this implementation
[INFO] [stdout] 265 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `thread_parking` is never used
[INFO] [stdout]  --> src/ch1/thread_parking.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn thread_parking() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new` and `get_mut` are never used
[INFO] [stdout]   --> src/ch6/arc.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> Arc<T> {
[INFO] [stdout]    | -------------- associated functions in this implementation
[INFO] [stdout] 20 |     pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn example1() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example2` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn example2() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example3` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn example3() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fetch_add_example` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn fetch_add_example() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example4` is never used
[INFO] [stdout]   --> src/ch2/atomic.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub fn example4() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_item` is never used
[INFO] [stdout]    --> src/ch2/atomic.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn process_item(i: usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `in_use` is never read
[INFO] [stdout]   --> src/ch5/channel.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 8  |     pub struct Channel<T> {
[INFO] [stdout]    |                ------- field in this struct
[INFO] [stdout] 9  |         message: UnsafeCell<MaybeUninit<T>>,
[INFO] [stdout] 10 |         in_use: AtomicBool,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, `is_ready`, and `receive` are never used
[INFO] [stdout]   --> src/ch5/channel.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 16 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 17 |         pub const fn new() -> Self {
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run1` is never used
[INFO] [stdout]   --> src/ch5/channel.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn run1() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]   --> src/ch5/channel.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     struct Channel<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]   --> src/ch5/channel.rs:83:16
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub struct Sender<T> {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]   --> src/ch5/channel.rs:87:16
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub struct Receiver<T> {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]   --> src/ch5/channel.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 101 |     impl<T> Sender<T> {
[INFO] [stdout]     |     ----------------- method in this implementation
[INFO] [stdout] 102 |         pub fn send(self, message: T) {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_ready` and `receive` are never used
[INFO] [stdout]    --> src/ch5/channel.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 108 |     impl<T> Receiver<T> {
[INFO] [stdout]     |     ------------------- methods in this implementation
[INFO] [stdout] 109 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:129:12
[INFO] [stdout]     |
[INFO] [stdout] 129 |     pub fn run() {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]    --> src/ch5/channel.rs:162:16
[INFO] [stdout]     |
[INFO] [stdout] 162 |     pub struct Sender<'a, T> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]    --> src/ch5/channel.rs:166:16
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub struct Receiver<'a, T> {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `split` are never used
[INFO] [stdout]    --> src/ch5/channel.rs:171:22
[INFO] [stdout]     |
[INFO] [stdout] 170 |     impl<T> Channel<T> {
[INFO] [stdout]     |     ------------------ associated items in this implementation
[INFO] [stdout] 171 |         pub const fn new() -> Self {
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |         pub fn split<'a>(&'a mut self) -> (Sender<'a, T>, Receiver<'a, T>) {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:185:16
[INFO] [stdout]     |
[INFO] [stdout] 184 |     impl<T> Sender<'_, T> {
[INFO] [stdout]     |     --------------------- method in this implementation
[INFO] [stdout] 185 |         pub fn send(self, message: T) {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_ready` and `receive` are never used
[INFO] [stdout]    --> src/ch5/channel.rs:192:16
[INFO] [stdout]     |
[INFO] [stdout] 191 |     impl<T> Receiver<'_, T> {
[INFO] [stdout]     |     ----------------------- methods in this implementation
[INFO] [stdout] 192 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run3` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:212:12
[INFO] [stdout]     |
[INFO] [stdout] 212 |     pub fn run3() {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_ready` is never used
[INFO] [stdout]    --> src/ch5/channel.rs:265:16
[INFO] [stdout]     |
[INFO] [stdout] 264 |     impl<T> Receiver<'_, T> {
[INFO] [stdout]     |     ----------------------- method in this implementation
[INFO] [stdout] 265 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_mut` is never used
[INFO] [stdout]   --> src/ch6/arc.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> Arc<T> {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "13a6c9d5a473e82b9fde5aace54d9ccc116e17744604c54d4e71f10bfc3def5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13a6c9d5a473e82b9fde5aace54d9ccc116e17744604c54d4e71f10bfc3def5c", kill_on_drop: false }`
[INFO] [stdout] 13a6c9d5a473e82b9fde5aace54d9ccc116e17744604c54d4e71f10bfc3def5c