[INFO] cloning repository https://github.com/mikeleppane/rust-atomics-and-locks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mikeleppane/rust-atomics-and-locks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeleppane%2Frust-atomics-and-locks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeleppane%2Frust-atomics-and-locks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 491bce7c76ee7f029f4fde79bbef39e819a411f3
[INFO] checking mikeleppane/rust-atomics-and-locks against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeleppane%2Frust-atomics-and-locks" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mikeleppane/rust-atomics-and-locks 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] removed /workspace/builds/worker-5-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/mikeleppane/rust-atomics-and-locks
[INFO] finished tweaking git repo https://github.com/mikeleppane/rust-atomics-and-locks
[INFO] tweaked toml for git repo https://github.com/mikeleppane/rust-atomics-and-locks written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mikeleppane/rust-atomics-and-locks 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded output_vt100 v0.1.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.54
[INFO] [stderr]   Downloaded pretty_assertions v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] e0ffc0a3d15822878d6ee4f6178a34a3014c3b23ca15b5b563273fcd92b472a1
[INFO] running `Command { std: "docker" "start" "-a" "e0ffc0a3d15822878d6ee4f6178a34a3014c3b23ca15b5b563273fcd92b472a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0ffc0a3d15822878d6ee4f6178a34a3014c3b23ca15b5b563273fcd92b472a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0ffc0a3d15822878d6ee4f6178a34a3014c3b23ca15b5b563273fcd92b472a1", kill_on_drop: false }`
[INFO] [stdout] e0ffc0a3d15822878d6ee4f6178a34a3014c3b23ca15b5b563273fcd92b472a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 9890b64c41eba564b084ff7cc4447f7839110c3160cce1f8d19a01ba1f4d9f4b
[INFO] running `Command { std: "docker" "start" "-a" "9890b64c41eba564b084ff7cc4447f7839110c3160cce1f8d19a01ba1f4d9f4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking pretty_assertions v1.3.0
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking atomics-and-locks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]   --> src/channels/channel.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     use std::thread;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]    --> src/channels/channel.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     use std::thread;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]    --> src/channels/channel.rs:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |     use std::thread;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]   --> src/memory_ordering/memory.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     use std::thread;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::current`
[INFO] [stdout]   --> src/memory_ordering/memory.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     use std::thread::current;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new` and `get_mut` are never used
[INFO] [stdout]   --> src/arc/reference_counting.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     impl<T> Arc<T> {
[INFO] [stdout]    |     -------------- associated functions in this implementation
[INFO] [stdout] 21 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new`, `get_mut`, and `downgrade` are never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:138:16
[INFO] [stdout]     |
[INFO] [stdout] 137 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated functions in this implementation
[INFO] [stdout] 138 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 167 |         pub fn downgrade(arc: &Self) -> Weak<T> {
[INFO] [stdout]     |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `upgrade` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:177:16
[INFO] [stdout]     |
[INFO] [stdout] 172 |     impl<T> Weak<T> {
[INFO] [stdout]     |     --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 177 |         pub fn upgrade(&self) -> Option<Arc<T>> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:319:16
[INFO] [stdout]     |
[INFO] [stdout] 318 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 319 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `upgrade` and `get_mut` are never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:349:16
[INFO] [stdout]     |
[INFO] [stdout] 344 |     impl<T> Weak<T> {
[INFO] [stdout]     |     --------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 349 |         pub fn upgrade(&self) -> Option<Arc<T>> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 368 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/channel.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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/channels/channel.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 11 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `in_use` is never read
[INFO] [stdout]   --> src/channels/channel.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub struct Channel<T> {
[INFO] [stdout]    |                ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 43 |         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/channels/channel.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 48 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 49 |         pub const fn new() -> Self {
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:138:16
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub struct Sender<T> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:142:16
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub struct Receiver<T> {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     struct Channel<T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]    --> src/channels/channel.rs:154:12
[INFO] [stdout]     |
[INFO] [stdout] 154 |     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/channels/channel.rs:164:16
[INFO] [stdout]     |
[INFO] [stdout] 162 |     impl<T> Sender<T> {
[INFO] [stdout]     |     ----------------- method in this implementation
[INFO] [stdout] 163 |         /// This never panics. :)
[INFO] [stdout] 164 |         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/channels/channel.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 170 |     impl<T> Receiver<T> {
[INFO] [stdout]     |     ------------------- methods in this implementation
[INFO] [stdout] 171 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 174 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:223:16
[INFO] [stdout]     |
[INFO] [stdout] 223 |     pub struct Sender<'a, T> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:227:16
[INFO] [stdout]     |
[INFO] [stdout] 227 |     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/channels/channel.rs:232:22
[INFO] [stdout]     |
[INFO] [stdout] 231 |     impl<T> Channel<T> {
[INFO] [stdout]     |     ------------------ associated items in this implementation
[INFO] [stdout] 232 |         pub const fn new() -> Self {
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 238 |         pub fn split(&mut self) -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]    --> src/channels/channel.rs:245:16
[INFO] [stdout]     |
[INFO] [stdout] 244 |     impl<T> Sender<'_, T> {
[INFO] [stdout]     |     --------------------- method in this implementation
[INFO] [stdout] 245 |         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/channels/channel.rs:252:16
[INFO] [stdout]     |
[INFO] [stdout] 251 |     impl<T> Receiver<'_, T> {
[INFO] [stdout]     |     ----------------------- methods in this implementation
[INFO] [stdout] 252 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 256 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `lock`, and `unlock` are never used
[INFO] [stdout]   --> src/spinning/spin_lock.rs:41:18
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> SpinLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 41 |     pub const fn new(value: T) -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn lock(&self) -> Guard<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub unsafe fn unlock(&self) {
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_mut` is never used
[INFO] [stdout]   --> src/arc/reference_counting.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     impl<T> Arc<T> {
[INFO] [stdout]    |     -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_mut` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:150:16
[INFO] [stdout]     |
[INFO] [stdout] 137 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 150 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:319:16
[INFO] [stdout]     |
[INFO] [stdout] 318 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 319 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `upgrade` and `get_mut` are never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:349:16
[INFO] [stdout]     |
[INFO] [stdout] 344 |     impl<T> Weak<T> {
[INFO] [stdout]     |     --------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 349 |         pub fn upgrade(&self) -> Option<Arc<T>> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 368 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/channel.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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/channels/channel.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 11 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unlock` is never used
[INFO] [stdout]   --> src/spinning/spin_lock.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> SpinLock<T> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub unsafe fn unlock(&self) {
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `Command { std: "docker" "inspect" "9890b64c41eba564b084ff7cc4447f7839110c3160cce1f8d19a01ba1f4d9f4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9890b64c41eba564b084ff7cc4447f7839110c3160cce1f8d19a01ba1f4d9f4b", kill_on_drop: false }`
[INFO] [stdout] 9890b64c41eba564b084ff7cc4447f7839110c3160cce1f8d19a01ba1f4d9f4b
[INFO] checking mikeleppane/rust-atomics-and-locks against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeleppane%2Frust-atomics-and-locks" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mikeleppane/rust-atomics-and-locks on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/mikeleppane/rust-atomics-and-locks
[INFO] finished tweaking git repo https://github.com/mikeleppane/rust-atomics-and-locks
[INFO] tweaked toml for git repo https://github.com/mikeleppane/rust-atomics-and-locks written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mikeleppane/rust-atomics-and-locks 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be718c3ea48554bc844c52e09b3bb9121bbcfc0078e7a95d8febf5383450feff
[INFO] running `Command { std: "docker" "start" "-a" "be718c3ea48554bc844c52e09b3bb9121bbcfc0078e7a95d8febf5383450feff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be718c3ea48554bc844c52e09b3bb9121bbcfc0078e7a95d8febf5383450feff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be718c3ea48554bc844c52e09b3bb9121bbcfc0078e7a95d8febf5383450feff", kill_on_drop: false }`
[INFO] [stdout] be718c3ea48554bc844c52e09b3bb9121bbcfc0078e7a95d8febf5383450feff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail_expr_drop_order" "-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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7031549f770a6f2d803be776afee4a0eef06f6898c44ed61a495dd7963415b03
[INFO] running `Command { std: "docker" "start" "-a" "7031549f770a6f2d803be776afee4a0eef06f6898c44ed61a495dd7963415b03", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking pretty_assertions v1.3.0
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking atomics-and-locks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]   --> src/channels/channel.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     use std::thread;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]    --> src/channels/channel.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     use std::thread;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]    --> src/channels/channel.rs:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |     use std::thread;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]   --> src/memory_ordering/memory.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     use std::thread;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::current`
[INFO] [stdout]   --> src/memory_ordering/memory.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     use std::thread::current;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new` and `get_mut` are never used
[INFO] [stdout]   --> src/arc/reference_counting.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     impl<T> Arc<T> {
[INFO] [stdout]    |     -------------- associated functions in this implementation
[INFO] [stdout] 21 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new`, `get_mut`, and `downgrade` are never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:138:16
[INFO] [stdout]     |
[INFO] [stdout] 137 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated functions in this implementation
[INFO] [stdout] 138 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 167 |         pub fn downgrade(arc: &Self) -> Weak<T> {
[INFO] [stdout]     |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `upgrade` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:177:16
[INFO] [stdout]     |
[INFO] [stdout] 172 |     impl<T> Weak<T> {
[INFO] [stdout]     |     --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 177 |         pub fn upgrade(&self) -> Option<Arc<T>> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:319:16
[INFO] [stdout]     |
[INFO] [stdout] 318 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 319 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `upgrade` and `get_mut` are never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:349:16
[INFO] [stdout]     |
[INFO] [stdout] 344 |     impl<T> Weak<T> {
[INFO] [stdout]     |     --------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 349 |         pub fn upgrade(&self) -> Option<Arc<T>> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 368 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/channel.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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/channels/channel.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 11 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `in_use` is never read
[INFO] [stdout]   --> src/channels/channel.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub struct Channel<T> {
[INFO] [stdout]    |                ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 43 |         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/channels/channel.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 48 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 49 |         pub const fn new() -> Self {
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:138:16
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub struct Sender<T> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:142:16
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub struct Receiver<T> {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     struct Channel<T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]    --> src/channels/channel.rs:154:12
[INFO] [stdout]     |
[INFO] [stdout] 154 |     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/channels/channel.rs:164:16
[INFO] [stdout]     |
[INFO] [stdout] 162 |     impl<T> Sender<T> {
[INFO] [stdout]     |     ----------------- method in this implementation
[INFO] [stdout] 163 |         /// This never panics. :)
[INFO] [stdout] 164 |         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/channels/channel.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 170 |     impl<T> Receiver<T> {
[INFO] [stdout]     |     ------------------- methods in this implementation
[INFO] [stdout] 171 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 174 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:223:16
[INFO] [stdout]     |
[INFO] [stdout] 223 |     pub struct Sender<'a, T> {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]    --> src/channels/channel.rs:227:16
[INFO] [stdout]     |
[INFO] [stdout] 227 |     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/channels/channel.rs:232:22
[INFO] [stdout]     |
[INFO] [stdout] 231 |     impl<T> Channel<T> {
[INFO] [stdout]     |     ------------------ associated items in this implementation
[INFO] [stdout] 232 |         pub const fn new() -> Self {
[INFO] [stdout]     |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 238 |         pub fn split(&mut self) -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]    --> src/channels/channel.rs:245:16
[INFO] [stdout]     |
[INFO] [stdout] 244 |     impl<T> Sender<'_, T> {
[INFO] [stdout]     |     --------------------- method in this implementation
[INFO] [stdout] 245 |         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/channels/channel.rs:252:16
[INFO] [stdout]     |
[INFO] [stdout] 251 |     impl<T> Receiver<'_, T> {
[INFO] [stdout]     |     ----------------------- methods in this implementation
[INFO] [stdout] 252 |         pub fn is_ready(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 256 |         pub fn receive(self) -> T {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `lock`, and `unlock` are never used
[INFO] [stdout]   --> src/spinning/spin_lock.rs:41:18
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> SpinLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 41 |     pub const fn new(value: T) -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn lock(&self) -> Guard<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub unsafe fn unlock(&self) {
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/arc/reference_counting.rs:23:46
[INFO] [stdout]    |
[INFO] [stdout] 21 |           pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]    |                      ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 22 |               Arc {
[INFO] [stdout] 23 |                   ptr: NonNull::from(Box::leak(Box::new(ArcData {
[INFO] [stdout]    |  ______________________________________________^
[INFO] [stdout] 24 | |                     ref_count: AtomicUsize::new(1),
[INFO] [stdout] 25 | |                     data,
[INFO] [stdout] 26 | |                 }))),
[INFO] [stdout]    | |__________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/arc/reference_counting.rs:140:23
[INFO] [stdout]     |
[INFO] [stdout] 138 |           pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                      ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 139 |               Arc {
[INFO] [stdout] 140 |                   weak: Weak {
[INFO] [stdout]     |  _______________________^
[INFO] [stdout] 141 | |                     ptr: NonNull::from(Box::leak(Box::new(ArcData {
[INFO] [stdout] 142 | |                         alloc_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 143 | |                         data_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 144 | |                         data: UnsafeCell::new(Some(data)),
[INFO] [stdout] 145 | |                     }))),
[INFO] [stdout] 146 | |                 },
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/arc/reference_counting.rs:321:46
[INFO] [stdout]     |
[INFO] [stdout] 319 |           pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                      ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 320 |               Arc {
[INFO] [stdout] 321 |                   ptr: NonNull::from(Box::leak(Box::new(ArcData {
[INFO] [stdout]     |  ______________________________________________^
[INFO] [stdout] 322 | |                     alloc_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 323 | |                     data_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 324 | |                     data: UnsafeCell::new(ManuallyDrop::new(data)),
[INFO] [stdout] 325 | |                 }))),
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/channels/channel.rs:159:10
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let a = Arc::new(Channel {
[INFO] [stdout]     |             - these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 159 |         (Sender { channel: a.clone() }, Receiver { channel: a })
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/channels/channel.rs:159:41
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let a = Arc::new(Channel {
[INFO] [stdout]     |             - these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 159 |         (Sender { channel: a.clone() }, Receiver { channel: a })
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/spinning/spin_lock.rs:44:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub const fn new(value: T) -> Self {
[INFO] [stdout]    |                      -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 44 |             value: UnsafeCell::new(value),
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `atomics-and-locks` (bin "atomics-and-locks") due to 7 previous errors; 26 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: associated function `get_mut` is never used
[INFO] [stdout]   --> src/arc/reference_counting.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     impl<T> Arc<T> {
[INFO] [stdout]    |     -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_mut` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:150:16
[INFO] [stdout]     |
[INFO] [stdout] 137 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 150 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:319:16
[INFO] [stdout]     |
[INFO] [stdout] 318 |     impl<T> Arc<T> {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 319 |         pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `upgrade` and `get_mut` are never used
[INFO] [stdout]    --> src/arc/reference_counting.rs:349:16
[INFO] [stdout]     |
[INFO] [stdout] 344 |     impl<T> Weak<T> {
[INFO] [stdout]     |     --------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 349 |         pub fn upgrade(&self) -> Option<Arc<T>> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 368 |         pub fn get_mut(arc: &mut Self) -> Option<&mut T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/channel.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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/channels/channel.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     impl<T> Channel<T> {
[INFO] [stdout]    |     ------------------ associated items in this implementation
[INFO] [stdout] 11 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |         pub fn send(&self, message: T) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |         pub fn receive(&self) -> T {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unlock` is never used
[INFO] [stdout]   --> src/spinning/spin_lock.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> SpinLock<T> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub unsafe fn unlock(&self) {
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/arc/reference_counting.rs:23:46
[INFO] [stdout]    |
[INFO] [stdout] 21 |           pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]    |                      ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 22 |               Arc {
[INFO] [stdout] 23 |                   ptr: NonNull::from(Box::leak(Box::new(ArcData {
[INFO] [stdout]    |  ______________________________________________^
[INFO] [stdout] 24 | |                     ref_count: AtomicUsize::new(1),
[INFO] [stdout] 25 | |                     data,
[INFO] [stdout] 26 | |                 }))),
[INFO] [stdout]    | |__________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/arc/reference_counting.rs:140:23
[INFO] [stdout]     |
[INFO] [stdout] 138 |           pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                      ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 139 |               Arc {
[INFO] [stdout] 140 |                   weak: Weak {
[INFO] [stdout]     |  _______________________^
[INFO] [stdout] 141 | |                     ptr: NonNull::from(Box::leak(Box::new(ArcData {
[INFO] [stdout] 142 | |                         alloc_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 143 | |                         data_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 144 | |                         data: UnsafeCell::new(Some(data)),
[INFO] [stdout] 145 | |                     }))),
[INFO] [stdout] 146 | |                 },
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/arc/reference_counting.rs:321:46
[INFO] [stdout]     |
[INFO] [stdout] 319 |           pub fn new(data: T) -> Arc<T> {
[INFO] [stdout]     |                      ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 320 |               Arc {
[INFO] [stdout] 321 |                   ptr: NonNull::from(Box::leak(Box::new(ArcData {
[INFO] [stdout]     |  ______________________________________________^
[INFO] [stdout] 322 | |                     alloc_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 323 | |                     data_ref_count: AtomicUsize::new(1),
[INFO] [stdout] 324 | |                     data: UnsafeCell::new(ManuallyDrop::new(data)),
[INFO] [stdout] 325 | |                 }))),
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/channels/channel.rs:159:10
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let a = Arc::new(Channel {
[INFO] [stdout]     |             - these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 159 |         (Sender { channel: a.clone() }, Receiver { channel: a })
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/channels/channel.rs:159:41
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let a = Arc::new(Channel {
[INFO] [stdout]     |             - these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 159 |         (Sender { channel: a.clone() }, Receiver { channel: a })
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/spinning/spin_lock.rs:44:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub const fn new(value: T) -> Self {
[INFO] [stdout]    |                      -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 44 |             value: UnsafeCell::new(value),
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/spinning/spin_lock.rs:73:24
[INFO] [stdout]    |
[INFO] [stdout] 73 |             s.spawn(|| x.lock().push(1));
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `atomics-and-locks` (bin "atomics-and-locks" test) due to 8 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7031549f770a6f2d803be776afee4a0eef06f6898c44ed61a495dd7963415b03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7031549f770a6f2d803be776afee4a0eef06f6898c44ed61a495dd7963415b03", kill_on_drop: false }`
[INFO] [stdout] 7031549f770a6f2d803be776afee4a0eef06f6898c44ed61a495dd7963415b03