[INFO] cloning repository https://github.com/nam2ee/concurrent-data-structure-clone-coding
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nam2ee/concurrent-data-structure-clone-coding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnam2ee%2Fconcurrent-data-structure-clone-coding", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnam2ee%2Fconcurrent-data-structure-clone-coding'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce1a090ce9f07478092cc1c4e2731aa84ffd76d2
[INFO] testing nam2ee/concurrent-data-structure-clone-coding against 1.91.0 for beta-1.92-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnam2ee%2Fconcurrent-data-structure-clone-coding" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nam2ee/concurrent-data-structure-clone-coding
[INFO] finished tweaking git repo https://github.com/nam2ee/concurrent-data-structure-clone-coding
[INFO] tweaked toml for git repo https://github.com/nam2ee/concurrent-data-structure-clone-coding written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nam2ee/concurrent-data-structure-clone-coding on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nam2ee/concurrent-data-structure-clone-coding 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded backtrace v0.3.76
[INFO] [stderr]   Downloaded gimli v0.32.3
[INFO] [stderr]   Downloaded addr2line v0.25.1
[INFO] [stderr]   Downloaded io-uring v0.7.10
[INFO] [stderr]   Downloaded object v0.37.3
[INFO] [stderr]   Downloaded libc v0.2.176
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c96db80f0b21aa267d75faaac605c7db6e95225c09fa6c8ac62ce3a21e0c5f30
[INFO] running `Command { std: "docker" "start" "-a" "c96db80f0b21aa267d75faaac605c7db6e95225c09fa6c8ac62ce3a21e0c5f30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c96db80f0b21aa267d75faaac605c7db6e95225c09fa6c8ac62ce3a21e0c5f30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c96db80f0b21aa267d75faaac605c7db6e95225c09fa6c8ac62ce3a21e0c5f30", kill_on_drop: false }`
[INFO] [stdout] c96db80f0b21aa267d75faaac605c7db6e95225c09fa6c8ac62ce3a21e0c5f30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fc8c35cc1e7a72fcffaae2fa39f1163ca17ff2222db46e50cfc062f83fafdff
[INFO] running `Command { std: "docker" "start" "-a" "0fc8c35cc1e7a72fcffaae2fa39f1163ca17ff2222db46e50cfc062f83fafdff", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling bytes v1.10.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling pin-project-lite v0.2.16
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling signal-hook-registry v1.4.6
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling concur v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/treibers.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::mem::{self, MaybeUninit};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::atomic`
[INFO] [stdout]  --> src/treibers.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::atomic;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/treibers.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let mut head = self.head.load(Acquire, &guard);
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut v =  Arc::new(Mutex::new(vec![1,2,34,5]));
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Stack` is never constructed
[INFO] [stdout]   --> src/treibers.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Stack<T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/treibers.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Node<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `pop`, and `is_empty` are never used
[INFO] [stdout]    --> src/treibers.rs:32:12
[INFO] [stdout]     |
[INFO] [stdout]  31 | impl<T> Stack<T>{
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout]  32 |     pub fn new() -> Self{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  38 |     pub fn push(&self, t:T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  63 |     pub fn pop(&self) -> Option<T>{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     tokio::join!(h1,h2);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     tokio::join!(h1,h2);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.21s
[INFO] running `Command { std: "docker" "inspect" "0fc8c35cc1e7a72fcffaae2fa39f1163ca17ff2222db46e50cfc062f83fafdff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fc8c35cc1e7a72fcffaae2fa39f1163ca17ff2222db46e50cfc062f83fafdff", kill_on_drop: false }`
[INFO] [stdout] 0fc8c35cc1e7a72fcffaae2fa39f1163ca17ff2222db46e50cfc062f83fafdff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5114f3ca9246cec3f3d4395dad29d33a5604ff031964c6e2faede06c9e167f09
[INFO] running `Command { std: "docker" "start" "-a" "5114f3ca9246cec3f3d4395dad29d33a5604ff031964c6e2faede06c9e167f09", kill_on_drop: false }`
[INFO] [stderr]    Compiling concur v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/treibers.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::mem::{self, MaybeUninit};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::atomic`
[INFO] [stdout]  --> src/treibers.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::atomic;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/treibers.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let mut head = self.head.load(Acquire, &guard);
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut v =  Arc::new(Mutex::new(vec![1,2,34,5]));
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Stack` is never constructed
[INFO] [stdout]   --> src/treibers.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Stack<T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/treibers.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Node<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `pop`, and `is_empty` are never used
[INFO] [stdout]    --> src/treibers.rs:32:12
[INFO] [stdout]     |
[INFO] [stdout]  31 | impl<T> Stack<T>{
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout]  32 |     pub fn new() -> Self{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  38 |     pub fn push(&self, t:T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  63 |     pub fn pop(&self) -> Option<T>{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     tokio::join!(h1,h2);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     tokio::join!(h1,h2);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "5114f3ca9246cec3f3d4395dad29d33a5604ff031964c6e2faede06c9e167f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5114f3ca9246cec3f3d4395dad29d33a5604ff031964c6e2faede06c9e167f09", kill_on_drop: false }`
[INFO] [stdout] 5114f3ca9246cec3f3d4395dad29d33a5604ff031964c6e2faede06c9e167f09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6070d153fcbb87fcf7ded92b2f12ce427abbb34484f1541b18849e118cf3bb2d
[INFO] running `Command { std: "docker" "start" "-a" "6070d153fcbb87fcf7ded92b2f12ce427abbb34484f1541b18849e118cf3bb2d", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/treibers.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use core::mem::{self, MaybeUninit};
[INFO] [stderr]   |                 ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::atomic`
[INFO] [stderr]  --> src/treibers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::sync::atomic;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/treibers.rs:68:17
[INFO] [stderr]    |
[INFO] [stderr] 68 |             let mut head = self.head.load(Acquire, &guard);
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut v =  Arc::new(Mutex::new(vec![1,2,34,5]));
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Stack` is never constructed
[INFO] [stderr]   --> src/treibers.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct Stack<T> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]   --> src/treibers.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Node<T> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `push`, `pop`, and `is_empty` are never used
[INFO] [stderr]    --> src/treibers.rs:32:12
[INFO] [stderr]     |
[INFO] [stderr]  31 | impl<T> Stack<T>{
[INFO] [stderr]     | ---------------- associated items in this implementation
[INFO] [stderr]  32 |     pub fn new() -> Self{
[INFO] [stderr]     |            ^^^
[INFO] [stderr] ...
[INFO] [stderr]  38 |     pub fn push(&self, t:T) {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr]  63 |     pub fn pop(&self) -> Option<T>{
[INFO] [stderr]     |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 100 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` in tuple element 0 that must be used
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     tokio::join!(h1,h2);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` in tuple element 1 that must be used
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     tokio::join!(h1,h2);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `concur` (bin "concur" test) generated 9 warnings (run `cargo fix --bin "concur" --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/concur-6a50c444e5515285)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6070d153fcbb87fcf7ded92b2f12ce427abbb34484f1541b18849e118cf3bb2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6070d153fcbb87fcf7ded92b2f12ce427abbb34484f1541b18849e118cf3bb2d", kill_on_drop: false }`
[INFO] [stdout] 6070d153fcbb87fcf7ded92b2f12ce427abbb34484f1541b18849e118cf3bb2d
