[INFO] cloning repository https://github.com/iceymoss/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iceymoss/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeymoss%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeymoss%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55a10aa2e7d3846b4cfb7a5dd16a8cecd3989e50
[INFO] testing iceymoss/learn-rust against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeymoss%2Flearn-rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/iceymoss/learn-rust
[INFO] finished tweaking git repo https://github.com/iceymoss/learn-rust
[INFO] tweaked toml for git repo https://github.com/iceymoss/learn-rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/iceymoss/learn-rust on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/iceymoss/learn-rust 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2103a04d89d6e62936827fa2566ee2729a1bbd4ae96c520ac3582dca28ca5b26
[INFO] running `Command { std: "docker" "start" "-a" "2103a04d89d6e62936827fa2566ee2729a1bbd4ae96c520ac3582dca28ca5b26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2103a04d89d6e62936827fa2566ee2729a1bbd4ae96c520ac3582dca28ca5b26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2103a04d89d6e62936827fa2566ee2729a1bbd4ae96c520ac3582dca28ca5b26", kill_on_drop: false }`
[INFO] [stdout] 2103a04d89d6e62936827fa2566ee2729a1bbd4ae96c520ac3582dca28ca5b26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f48817d27e5d6685ee872eea3ee0e4372e8cfe2ced2ffca560ec3c444830ad1f
[INFO] running `Command { std: "docker" "start" "-a" "f48817d27e5d6685ee872eea3ee0e4372e8cfe2ced2ffca560ec3c444830ad1f", kill_on_drop: false }`
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[INFO] [stderr]    Compiling bitflags v2.9.1
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[INFO] [stderr]    Compiling url v2.5.4
[INFO] [stderr]    Compiling sqlx-core v0.7.4
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[INFO] [stderr]    Compiling tower-http v0.5.2
[INFO] [stderr]    Compiling tempfile v3.20.0
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[INFO] [stderr]    Compiling hyper-util v0.1.13
[INFO] [stderr]    Compiling axum v0.7.9
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[INFO] [stderr]    Compiling sqlx-mysql v0.7.4
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[INFO] [stderr]    Compiling sqlx-macros-core v0.7.4
[INFO] [stderr]    Compiling sqlx-macros v0.7.4
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[INFO] [stderr]    Compiling sea-query-binder v0.5.0
[INFO] [stderr]    Compiling sea-orm v0.12.15
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `tokio::task::futures`
[INFO] [stdout]  --> src/channel/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tokio::task::futures;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqrt`
[INFO] [stdout]  --> src/operations/mod.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use advanced::{sqrt};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sqrt` is never used
[INFO] [stdout]  --> src/operations/advanced.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn sqrt(x: f64) -> Result<f64, CalculatorError> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NegativeRoot` and `InvalidInput` are never constructed
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum CalculatorError {
[INFO] [stdout]   |          --------------- variants in this enum
[INFO] [stdout] 3 |     DivisionByZero,
[INFO] [stdout] 4 |     NegativeRoot,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 5 |     InvalidInput,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CalculatorError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write` is never used
[INFO] [stdout]  --> src/file/write.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub async fn write() -> std::io::Result<()> {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read` is never used
[INFO] [stdout]  --> src/file/read.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub async fn read() -> std::io::Result<()> {
[INFO] [stdout]   |              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arc_data`
[INFO] [stdout]   --> src/mutex/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let arc_data = Arc::new(atomic_forty_two);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arc_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/async/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     write().await;
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let _ = write().await;
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/async/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     read().await;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let _ = read().await;
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused implementer of `Future` that must be used
[INFO] [stdout]   --> src/mutex/main.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     mutex_test();
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 50s
[INFO] running `Command { std: "docker" "inspect" "f48817d27e5d6685ee872eea3ee0e4372e8cfe2ced2ffca560ec3c444830ad1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f48817d27e5d6685ee872eea3ee0e4372e8cfe2ced2ffca560ec3c444830ad1f", kill_on_drop: false }`
[INFO] [stdout] f48817d27e5d6685ee872eea3ee0e4372e8cfe2ced2ffca560ec3c444830ad1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6d3a648b34f1d4e855e2c3be5384da4fb7df9ef42e8ae1405e881126ad96264
[INFO] running `Command { std: "docker" "start" "-a" "a6d3a648b34f1d4e855e2c3be5384da4fb7df9ef42e8ae1405e881126ad96264", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `tokio::task::futures`
[INFO] [stdout]  --> src/channel/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tokio::task::futures;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arc_data`
[INFO] [stdout]   --> src/mutex/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let arc_data = Arc::new(atomic_forty_two);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arc_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/async/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     write().await;
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let _ = write().await;
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/async/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     read().await;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let _ = read().await;
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused implementer of `Future` that must be used
[INFO] [stdout]   --> src/mutex/main.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     mutex_test();
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqrt`
[INFO] [stdout]  --> src/operations/mod.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use advanced::{sqrt};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sqrt` is never used
[INFO] [stdout]  --> src/operations/advanced.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn sqrt(x: f64) -> Result<f64, CalculatorError> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NegativeRoot` and `InvalidInput` are never constructed
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum CalculatorError {
[INFO] [stdout]   |          --------------- variants in this enum
[INFO] [stdout] 3 |     DivisionByZero,
[INFO] [stdout] 4 |     NegativeRoot,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 5 |     InvalidInput,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CalculatorError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write` is never used
[INFO] [stdout]  --> src/file/write.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub async fn write() -> std::io::Result<()> {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read` is never used
[INFO] [stdout]  --> src/file/read.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub async fn read() -> std::io::Result<()> {
[INFO] [stdout]   |              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "a6d3a648b34f1d4e855e2c3be5384da4fb7df9ef42e8ae1405e881126ad96264", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6d3a648b34f1d4e855e2c3be5384da4fb7df9ef42e8ae1405e881126ad96264", kill_on_drop: false }`
[INFO] [stdout] a6d3a648b34f1d4e855e2c3be5384da4fb7df9ef42e8ae1405e881126ad96264
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 273f04c7c1f968328853b243ba90ac1cf2eb38603fe7e2460af33a164a63357b
[INFO] running `Command { std: "docker" "start" "-a" "273f04c7c1f968328853b243ba90ac1cf2eb38603fe7e2460af33a164a63357b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `arc_data`
[INFO] [stderr]   --> src/mutex/main.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let arc_data = Arc::new(atomic_forty_two);
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arc_data`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused implementer of `Future` that must be used
[INFO] [stderr]   --> src/mutex/main.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     mutex_test();
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::task::futures`
[INFO] [stderr]  --> src/channel/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tokio::task::futures;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]  --> src/async/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     write().await;
[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)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let _ = write().await;
[INFO] [stderr]   |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]  --> src/async/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     read().await;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let _ = read().await;
[INFO] [stderr]   |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `sqrt`
[INFO] [stderr]  --> src/operations/mod.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub use advanced::{sqrt};
[INFO] [stderr]   |                    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `sqrt` is never used
[INFO] [stderr]  --> src/operations/advanced.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn sqrt(x: f64) -> Result<f64, CalculatorError> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `NegativeRoot` and `InvalidInput` are never constructed
[INFO] [stderr]  --> src/error.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub enum CalculatorError {
[INFO] [stderr]   |          --------------- variants in this enum
[INFO] [stderr] 3 |     DivisionByZero,
[INFO] [stderr] 4 |     NegativeRoot,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 5 |     InvalidInput,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `CalculatorError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `write` is never used
[INFO] [stderr]  --> src/file/write.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub async fn write() -> std::io::Result<()> {
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read` is never used
[INFO] [stderr]  --> src/file/read.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub async fn read() -> std::io::Result<()> {
[INFO] [stderr]   |              ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-rust` (bin "mutex" test) generated 2 warnings
[INFO] [stderr] warning: `learn-rust` (bin "channel" test) generated 1 warning (run `cargo fix --bin "channel" --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `learn-rust` (bin "async" test) generated 2 warnings
[INFO] [stderr] warning: `learn-rust` (bin "test-hello" test) generated 5 warnings (run `cargo fix --bin "test-hello" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn_rust-1c7c428fef4e998b)
[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] [stderr]      Running unittests src/async/main.rs (/opt/rustwide/target/debug/deps/async-a93484dde12128c4)
[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] [stderr]      Running unittests src/channel/main.rs (/opt/rustwide/target/debug/deps/channel-e57373782877d338)
[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] [stderr]      Running unittests src/cli/cli.rs (/opt/rustwide/target/debug/deps/cli-a281bfcc8aedf6be)
[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] [stderr]      Running unittests src/test/main.rs (/opt/rustwide/target/debug/deps/hello-0baa27f668155986)
[INFO] [stderr]      Running unittests src/mutex/main.rs (/opt/rustwide/target/debug/deps/mutex-a28e32910f0bd1e2)
[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] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/axum/server.rs (/opt/rustwide/target/debug/deps/server-9b62972fd6540718)
[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] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/tasks/task.rs (/opt/rustwide/target/debug/deps/task-620f8a33d2b8c7b7)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/test_hello-55d7c9bfff5d21dd)
[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] [stderr]    Doc-tests learn_rust
[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" "273f04c7c1f968328853b243ba90ac1cf2eb38603fe7e2460af33a164a63357b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "273f04c7c1f968328853b243ba90ac1cf2eb38603fe7e2460af33a164a63357b", kill_on_drop: false }`
[INFO] [stdout] 273f04c7c1f968328853b243ba90ac1cf2eb38603fe7e2460af33a164a63357b