[INFO] cloning repository https://github.com/Dominik355/rust_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Dominik355/rust_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDominik355%2Frust_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDominik355%2Frust_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 905d47fd83458ff296a0a282111bbf3f1ae90b35
[INFO] building Dominik355/rust_playground against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDominik355%2Frust_playground" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Dominik355/rust_playground on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Dominik355/rust_playground
[INFO] finished tweaking git repo https://github.com/Dominik355/rust_playground
[INFO] tweaked toml for git repo https://github.com/Dominik355/rust_playground written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Dominik355/rust_playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-3-tc1/source/async_testing/Cargo.toml: unused manifest key: dev
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded oorandom v11.1.4
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[INFO] [stderr]   Downloaded toml_edit v0.22.16
[INFO] [stderr]   Downloaded cron v0.12.1
[INFO] [stderr]   Downloaded left-right v0.11.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7909fab8f4b7183d56329383e6b5ecdbc544d63fa98ba824c4b6f418baa0366c
[INFO] running `Command { std: "docker" "start" "-a" "7909fab8f4b7183d56329383e6b5ecdbc544d63fa98ba824c4b6f418baa0366c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7909fab8f4b7183d56329383e6b5ecdbc544d63fa98ba824c4b6f418baa0366c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7909fab8f4b7183d56329383e6b5ecdbc544d63fa98ba824c4b6f418baa0366c", kill_on_drop: false }`
[INFO] [stdout] 7909fab8f4b7183d56329383e6b5ecdbc544d63fa98ba824c4b6f418baa0366c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19c6f55603db7e520fe5003711cb864464112c19389ea22c535baa54509b57e3
[INFO] running `Command { std: "docker" "start" "-a" "19c6f55603db7e520fe5003711cb864464112c19389ea22c535baa54509b57e3", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/async_testing/Cargo.toml: unused manifest key: dev
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[INFO] [stderr]    Compiling sync v0.1.0 (/opt/rustwide/workdir/sync)
[INFO] [stdout] warning: field `last_seen_version` is never read
[INFO] [stdout]   --> sync/src/watch_channel.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Receiver<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 22 |     shared: Arc<Shared<T>>,
[INFO] [stdout] 23 |     last_seen_version: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `lock` and `updated` are never read
[INFO] [stdout]   --> sync/src/watch_channel.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct Shared<T> {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 36 |     lock: Mutex<SharedValue<T>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 37 |     updated: Condvar,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `version` are never read
[INFO] [stdout]   --> sync/src/watch_channel.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | struct SharedValue<T> {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 41 |     value: T,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 42 |     version: u64,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channel` is never used
[INFO] [stdout]   --> sync/src/watch_channel.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn channel<T: Clone>(value: T) -> (Sender<T>, Receiver<T>) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `new_sender` is never used
[INFO] [stdout]   --> sync/src/watch_channel.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T: Clone> Receiver<T> {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] 62 |     pub fn new_sender(&self) -> Sender<T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `receive`, `get_if_new`, `receive_blocking`, and `wait_timeout` are never used
[INFO] [stdout]   --> sync/src/watch_channel.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl<T: Clone> Receiver<T> {
[INFO] [stdout]    | -------------------------- methods in this implementation
[INFO] [stdout] 70 |     pub fn receive(&mut self) -> T {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     pub fn get_if_new(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     pub fn receive_blocking(&mut self) -> T {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96 |     pub fn wait_timeout(&mut self, duration: Duration) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `send`, `subscribe`, and `update` are never used
[INFO] [stdout]    --> sync/src/watch_channel.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 117 | impl<T> Sender<T> {
[INFO] [stdout]     | ----------------- methods in this implementation
[INFO] [stdout] 118 |     pub fn send(&self, value: T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 127 |     pub fn subscribe(&self) -> Receiver<T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 139 |     pub fn update<F>(&self, f: F)
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]    --> sync/src/watch_channel.rs:211:9
[INFO] [stdout]     |
[INFO] [stdout] 210 |     pub struct Mutex<T> {
[INFO] [stdout]     |                ----- field in this struct
[INFO] [stdout] 211 |         inner: std::sync::Mutex<T>,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `lock` are never used
[INFO] [stdout]    --> sync/src/watch_channel.rs:215:16
[INFO] [stdout]     |
[INFO] [stdout] 214 |     impl<T> Mutex<T> {
[INFO] [stdout]     |     ---------------- associated items in this implementation
[INFO] [stdout] 215 |         pub fn new(value: T) -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 221 |         pub fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]    --> sync/src/watch_channel.rs:227:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |     pub struct Condvar {
[INFO] [stdout]     |                ------- field in this struct
[INFO] [stdout] 227 |         inner: std::sync::Condvar,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `wait`, `wait_timeout`, and `notify_all` are never used
[INFO] [stdout]    --> sync/src/watch_channel.rs:230:16
[INFO] [stdout]     |
[INFO] [stdout] 229 |     impl Condvar {
[INFO] [stdout]     |     ------------ associated items in this implementation
[INFO] [stdout] 230 |         pub fn new() -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 236 |         pub fn wait<'a, T>(&self, guard: MutexGuard<'a, T>) -> MutexGuard<'a, T> {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 242 |         pub fn wait_timeout<'a, T>(
[INFO] [stdout]     |                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 252 |         pub fn notify_all(&self) {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]    Compiling anstyle v1.0.7
[INFO] [stderr]    Compiling clap_lex v0.7.1
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[INFO] [stderr]    Compiling plotters-backend v0.3.6
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[INFO] [stderr]    Compiling toml_edit v0.22.16
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[INFO] [stderr]    Compiling clap v4.5.9
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[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/rustwide/workdir/everything)
[INFO] [stderr]    Compiling num_enum_derive v0.5.11
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling is-terminal v0.4.12
[INFO] [stderr]    Compiling left-right v0.11.5
[INFO] [stderr]    Compiling num_enum v0.5.11
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[INFO] [stderr]    Compiling toml v0.8.15
[INFO] [stderr]    Compiling oorandom v11.1.4
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[INFO] [stderr]    Compiling criterion v0.5.1
[INFO] [stderr]    Compiling arcswap-vs-leftright v0.1.0 (/opt/rustwide/workdir/arcswap-vs-leftright)
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> arcswap-vs-leftright/src/lib.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn main() {}
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> sync/src/bin/select.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     loop {
[INFO] [stdout] 14 | |         select! {
[INFO] [stdout] 15 | |             // this should panic because we are polling completed task again
[INFO] [stdout] 16 | |             finished_task_res = &mut finished_task, if !finished => {
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 25 |
[INFO] [stdout] 26 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `finished_task_res`
[INFO] [stdout]   --> sync/src/bin/select.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |             finished_task_res = &mut finished_task, if !finished => {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_finished_task_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `forever_task_res`
[INFO] [stdout]   --> sync/src/bin/select.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |             forever_task_res = &mut forever_task => {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_forever_task_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `flume`
[INFO] [stdout]  --> sync/src/bin/select_else.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let (tx, rx) = flume::unbounded();
[INFO] [stdout]   |                    ^^^^^ use of undeclared crate or module `flume`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sync` (bin "select_else") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "19c6f55603db7e520fe5003711cb864464112c19389ea22c535baa54509b57e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19c6f55603db7e520fe5003711cb864464112c19389ea22c535baa54509b57e3", kill_on_drop: false }`
[INFO] [stdout] 19c6f55603db7e520fe5003711cb864464112c19389ea22c535baa54509b57e3
