[INFO] cloning repository https://github.com/JackMatusiewicz/rust_atomics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JackMatusiewicz/rust_atomics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackMatusiewicz%2Frust_atomics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackMatusiewicz%2Frust_atomics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b118cc9b81d4c757c13fee007e38a2fd5e07b525
[INFO] checking JackMatusiewicz/rust_atomics/b118cc9b81d4c757c13fee007e38a2fd5e07b525 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackMatusiewicz%2Frust_atomics" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JackMatusiewicz/rust_atomics on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JackMatusiewicz/rust_atomics
[INFO] finished tweaking git repo https://github.com/JackMatusiewicz/rust_atomics
[INFO] tweaked toml for git repo https://github.com/JackMatusiewicz/rust_atomics written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/JackMatusiewicz/rust_atomics 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0d2342fa589f917d6155bf90b254b3582319b5e68b42118dfcfa4f27fa7c08d
[INFO] running `Command { std: "docker" "start" "-a" "a0d2342fa589f917d6155bf90b254b3582319b5e68b42118dfcfa4f27fa7c08d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0d2342fa589f917d6155bf90b254b3582319b5e68b42118dfcfa4f27fa7c08d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0d2342fa589f917d6155bf90b254b3582319b5e68b42118dfcfa4f27fa7c08d", kill_on_drop: false }`
[INFO] [stdout] a0d2342fa589f917d6155bf90b254b3582319b5e68b42118dfcfa4f27fa7c08d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f38be346132af8b28b3d0d640cccb670113d2699870d223de4b9ad7201dfe867
[INFO] running `Command { std: "docker" "start" "-a" "f38be346132af8b28b3d0d640cccb670113d2699870d223de4b9ad7201dfe867", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_atomics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `new` and `lock` are never used
[INFO] [stdout]   --> src/spin_lock.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl<T> SpinLock<T> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 45 |     pub fn new(v: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn lock(&self) -> SpinLockGuard<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/channel.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Channel<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `enqueue`, and `dequeue` are never used
[INFO] [stdout]   --> src/channels/channel.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 9  |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn enqueue(&self, data: T) -> () {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn dequeue(&self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MutexChannel` is never constructed
[INFO] [stdout]  --> src/channels/mutex_channel.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct MutexChannel<T> {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `enqueue`, and `dequeue` are never used
[INFO] [stdout]   --> src/channels/mutex_channel.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<T> MutexChannel<T> {
[INFO] [stdout]    | ----------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn enqueue(&self, message: T) -> () {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn dequeue(&self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `in_use` is never read
[INFO] [stdout]  --> src/channels/one_shot.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct OneShotChannel<T> {
[INFO] [stdout]   |            -------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 9 |     in_use: AtomicBool
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `enqueue`, `is_ready`, and `dequeue` are never used
[INFO] [stdout]   --> src/channels/one_shot.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> OneShotChannel<T> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 13 |     pub const fn new() -> Self {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn enqueue(&self, message: T) -> () {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn dequeue(&self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/one_shot_typed.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Channel<T> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]   --> src/channels/one_shot_typed.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Sender<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]   --> src/channels/one_shot_typed.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Receiver<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new_channel` and `new` are never used
[INFO] [stdout]   --> src/channels/one_shot_typed.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated functions in this implementation
[INFO] [stdout] 23 |     fn new_channel() -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn new() -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]   --> src/channels/one_shot_typed.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl<T> Sender<T> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 48 |     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/one_shot_typed.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl<T> Receiver<T> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 55 |     pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn receive(self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/one_shot_borrow.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Channel<T> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]   --> src/channels/one_shot_borrow.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Sender<'a, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]   --> src/channels/one_shot_borrow.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Receiver<'a, T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new_channel` and `new` are never used
[INFO] [stdout]   --> src/channels/one_shot_borrow.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated functions in this implementation
[INFO] [stdout] 22 |     fn new_channel() -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn new(channel: &mut Channel<T>) -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]   --> src/channels/one_shot_borrow.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<T> Sender<'_, T> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] 46 |     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/one_shot_borrow.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | impl<T> Receiver<'_, T> {
[INFO] [stdout]    | ----------------------- methods in this implementation
[INFO] [stdout] 53 |     pub fn is_ready(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn receive(self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channels/one_shot_blocking.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Channel<T> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]   --> src/channels/one_shot_blocking.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Sender<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]   --> src/channels/one_shot_blocking.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Receiver<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new_channel` and `new` are never used
[INFO] [stdout]   --> src/channels/one_shot_blocking.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated functions in this implementation
[INFO] [stdout] 28 |     fn new_channel() -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn new() -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]   --> src/channels/one_shot_blocking.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl<T> Sender<T> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 54 |     pub fn send(self, message: T) -> () {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `receive` is never used
[INFO] [stdout]   --> src/channels/one_shot_blocking.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T> Receiver<T> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] 62 |     pub fn receive(self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "f38be346132af8b28b3d0d640cccb670113d2699870d223de4b9ad7201dfe867", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f38be346132af8b28b3d0d640cccb670113d2699870d223de4b9ad7201dfe867", kill_on_drop: false }`
[INFO] [stdout] f38be346132af8b28b3d0d640cccb670113d2699870d223de4b9ad7201dfe867