[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] checking iceymoss/learn-rust against master#f21fbac535ab2c3bc50db20547f4d48477357103 for pr-143193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeymoss%2Flearn-rust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-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-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/iceymoss/learn-rust on toolchain f21fbac535ab2c3bc50db20547f4d48477357103
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "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" "+f21fbac535ab2c3bc50db20547f4d48477357103" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sea-query-binder v0.5.0
[INFO] [stderr]   Downloaded pnet_macros_support v0.34.0
[INFO] [stderr]   Downloaded pnet_macros v0.34.0
[INFO] [stderr]   Downloaded pnet_base v0.34.0
[INFO] [stderr]   Downloaded dns-lookup v1.0.8
[INFO] [stderr]   Downloaded sea-bae v0.2.1
[INFO] [stderr]   Downloaded ordered-float v3.9.2
[INFO] [stderr]   Downloaded ouroboros v0.17.2
[INFO] [stderr]   Downloaded clap v4.5.39
[INFO] [stderr]   Downloaded ouroboros_macro v0.17.2
[INFO] [stderr]   Downloaded jiff-static v0.2.14
[INFO] [stderr]   Downloaded rust_decimal v1.37.1
[INFO] [stderr]   Downloaded sea-orm-macros v0.12.15
[INFO] [stderr]   Downloaded inherent v1.0.12
[INFO] [stderr]   Downloaded aliasable v0.1.3
[INFO] [stderr]   Downloaded clap_builder v4.5.39
[INFO] [stderr]   Downloaded bigdecimal v0.3.1
[INFO] [stderr]   Downloaded pnet_packet v0.34.0
[INFO] [stderr]   Downloaded surge-ping v0.8.2
[INFO] [stderr]   Downloaded sea-query v0.30.7
[INFO] [stderr]   Downloaded jiff v0.2.14
[INFO] [stderr]   Downloaded sea-orm v0.12.15
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fe066098e06e36ee2fb033ebed5aac9c23f08677600e93a562a7b6000117180
[INFO] running `Command { std: "docker" "start" "-a" "8fe066098e06e36ee2fb033ebed5aac9c23f08677600e93a562a7b6000117180", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fe066098e06e36ee2fb033ebed5aac9c23f08677600e93a562a7b6000117180", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fe066098e06e36ee2fb033ebed5aac9c23f08677600e93a562a7b6000117180", kill_on_drop: false }`
[INFO] [stdout] 8fe066098e06e36ee2fb033ebed5aac9c23f08677600e93a562a7b6000117180
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e21e8b64067cedd1b50e05e8416eef715608495c2e6a60bae6dabd0d8dcf4c91
[INFO] running `Command { std: "docker" "start" "-a" "e21e8b64067cedd1b50e05e8416eef715608495c2e6a60bae6dabd0d8dcf4c91", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling zerocopy v0.8.25
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]     Checking smallvec v1.15.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]    Compiling icu_normalizer_data v2.0.0
[INFO] [stderr]    Compiling icu_properties_data v2.0.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking bytes v1.10.1
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]    Compiling const-oid v0.9.6
[INFO] [stderr]     Checking itoa v1.0.15
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]     Checking tracing-core v0.1.33
[INFO] [stderr]    Compiling litemap v0.8.0
[INFO] [stderr]    Compiling writeable v0.6.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]    Compiling rust_decimal v1.37.1
[INFO] [stderr]    Compiling time-core v0.1.4
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]    Compiling base64ct v1.7.3
[INFO] [stderr]    Compiling time-macros v0.2.22
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling zeroize v1.8.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-bigint-dig v0.8.4
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling pem-rfc7468 v0.7.0
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]     Checking mio v1.0.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.5
[INFO] [stderr]    Compiling pin-project-lite v0.2.16
[INFO] [stderr]    Compiling der v0.7.10
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling cpufeatures v0.2.17
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling utf8_iter v1.0.4
[INFO] [stderr]    Compiling powerfmt v0.2.0
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]     Checking iana-time-zone v0.1.63
[INFO] [stderr]     Checking ryu v1.0.20
[INFO] [stderr]    Compiling percent-encoding v2.3.1
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]    Compiling tinyvec v1.9.0
[INFO] [stderr]    Compiling deranged v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling spki v0.7.3
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling pkcs8 v0.10.2
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling rustix v1.0.7
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling crc-catalog v2.4.0
[INFO] [stderr]    Compiling unicode_categories v0.1.1
[INFO] [stderr]    Compiling hashbrown v0.15.3
[INFO] [stderr]    Compiling tokio v1.45.1
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling time v0.3.41
[INFO] [stderr]    Compiling chrono v0.4.41
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling crc v3.3.0
[INFO] [stderr]    Compiling hashlink v0.8.4
[INFO] [stderr]    Compiling bigdecimal v0.3.1
[INFO] [stderr]     Checking http v1.3.1
[INFO] [stderr]    Compiling pkcs1 v0.7.5
[INFO] [stderr]    Compiling futures-intrusive v0.5.0
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling atoi v2.0.0
[INFO] [stderr]    Compiling indexmap v2.9.0
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling signature v2.2.0
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling linux-raw-sys v0.9.4
[INFO] [stderr]    Compiling uuid v1.17.0
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling unicode-bidi v0.3.18
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]    Compiling unicode-properties v0.1.3
[INFO] [stderr]     Checking http-body v1.0.1
[INFO] [stderr]    Compiling hkdf v0.12.4
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling md-5 v0.10.6
[INFO] [stderr]    Compiling stringprep v0.1.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling dotenvy v0.15.7
[INFO] [stderr]    Compiling sqlformat v0.2.6
[INFO] [stderr]    Compiling rsa v0.9.8
[INFO] [stderr]    Compiling whoami v1.6.0
[INFO] [stderr]    Compiling base64 v0.21.7
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]     Checking anstyle-parse v0.2.7
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]    Compiling unicase v2.8.1
[INFO] [stderr]     Checking no-std-net v0.6.0
[INFO] [stderr]     Checking tower-layer v0.3.3
[INFO] [stderr]     Checking anstyle-query v1.1.3
[INFO] [stderr]     Checking anstyle v1.0.11
[INFO] [stderr]     Checking colorchoice v1.0.4
[INFO] [stderr]    Compiling rustversion v1.0.21
[INFO] [stderr]    Compiling proc-macro-error2 v2.0.1
[INFO] [stderr]     Checking anstream v0.6.19
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking pnet_base v0.34.0
[INFO] [stderr]    Compiling mime_guess v2.0.5
[INFO] [stderr]     Checking http-body-util v0.1.3
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking sync_wrapper v1.0.2
[INFO] [stderr]     Checking pnet_macros_support v0.34.0
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]    Compiling anyhow v1.0.98
[INFO] [stderr]     Checking clap_lex v0.7.4
[INFO] [stderr]    Compiling tokio-cron-scheduler v0.14.0
[INFO] [stderr]     Checking clap_builder v4.5.39
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.9.1
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking matchit v0.7.3
[INFO] [stderr]     Checking jiff v0.2.14
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]     Checking http-range-header v0.4.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking dns-lookup v1.0.8
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling tokio-stream v0.1.17
[INFO] [stderr]    Compiling inherent v1.0.12
[INFO] [stderr]    Compiling async-trait v0.1.88
[INFO] [stderr]    Compiling ouroboros_macro v0.17.2
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]    Compiling sea-bae v0.2.1
[INFO] [stderr]    Compiling clap_derive v4.5.32
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]     Checking async-stream v0.3.6
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling yoke v0.8.0
[INFO] [stderr]    Compiling sea-orm-macros v0.12.15
[INFO] [stderr]     Checking env_filter v0.1.3
[INFO] [stderr]    Compiling zerovec v0.11.2
[INFO] [stderr]    Compiling zerotrie v0.2.2
[INFO] [stderr]     Checking axum-core v0.4.5
[INFO] [stderr]     Checking ouroboros v0.17.2
[INFO] [stderr]    Compiling pnet_macros v0.34.0
[INFO] [stderr]     Checking clap v4.5.39
[INFO] [stderr]     Checking env_logger v0.11.8
[INFO] [stderr]     Checking tinystr v0.8.1
[INFO] [stderr]     Checking potential_utf v0.1.2
[INFO] [stderr]     Checking icu_collections v2.0.0
[INFO] [stderr]     Checking icu_locale_core v2.0.0
[INFO] [stderr]     Checking pnet_packet v0.34.0
[INFO] [stderr]     Checking icu_provider v2.0.0
[INFO] [stderr]     Checking icu_normalizer v2.0.0
[INFO] [stderr]     Checking icu_properties v2.0.1
[INFO] [stderr]     Checking idna_adapter v1.2.1
[INFO] [stderr]     Checking idna v1.0.3
[INFO] [stderr]     Checking hyper v1.6.0
[INFO] [stderr]     Checking tower v0.5.2
[INFO] [stderr]     Checking tokio-util v0.7.15
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking bitflags v2.9.1
[INFO] [stderr]     Checking serde_path_to_error v0.1.17
[INFO] [stderr]     Checking url v2.5.4
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking tower-http v0.5.2
[INFO] [stderr]     Checking hyper-util v0.1.13
[INFO] [stderr]     Checking axum v0.7.9
[INFO] [stderr]     Checking croner v2.1.0
[INFO] [stderr]     Checking surge-ping v0.8.2
[INFO] [stderr]    Compiling sqlx-core v0.7.4
[INFO] [stderr]    Compiling tempfile v3.20.0
[INFO] [stderr]     Checking sea-query v0.30.7
[INFO] [stderr]     Checking sqlx-mysql v0.7.4
[INFO] [stderr]    Compiling sqlx-macros-core v0.7.4
[INFO] [stderr]    Compiling sqlx-macros v0.7.4
[INFO] [stderr]     Checking sqlx v0.7.4
[INFO] [stderr]     Checking sea-query-binder v0.5.0
[INFO] [stderr]     Checking sea-orm v0.12.15
[INFO] [stderr]     Checking 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: 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 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 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 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: `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 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] [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: 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 `dev` profile [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `Command { std: "docker" "inspect" "e21e8b64067cedd1b50e05e8416eef715608495c2e6a60bae6dabd0d8dcf4c91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e21e8b64067cedd1b50e05e8416eef715608495c2e6a60bae6dabd0d8dcf4c91", kill_on_drop: false }`
[INFO] [stdout] e21e8b64067cedd1b50e05e8416eef715608495c2e6a60bae6dabd0d8dcf4c91