[INFO] cloning repository https://github.com/ignoreAnt/rust-learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ignoreAnt/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FignoreAnt%2Frust-learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FignoreAnt%2Frust-learning'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 05ce36d412ca40017a1f0d1f7f1959157d620c8c [INFO] building ignoreAnt/rust-learning against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FignoreAnt%2Frust-learning" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/ignoreAnt/rust-learning [INFO] finished tweaking git repo https://github.com/ignoreAnt/rust-learning [INFO] tweaked toml for git repo https://github.com/ignoreAnt/rust-learning written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/ignoreAnt/rust-learning on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/ignoreAnt/rust-learning 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded cc v1.1.36 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c2e1052529bb51ea06bd2461fe65c6a636d52f9c7aa20e2bc93559462f332cf2 [INFO] running `Command { std: "docker" "start" "-a" "c2e1052529bb51ea06bd2461fe65c6a636d52f9c7aa20e2bc93559462f332cf2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c2e1052529bb51ea06bd2461fe65c6a636d52f9c7aa20e2bc93559462f332cf2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c2e1052529bb51ea06bd2461fe65c6a636d52f9c7aa20e2bc93559462f332cf2", kill_on_drop: false }` [INFO] [stdout] c2e1052529bb51ea06bd2461fe65c6a636d52f9c7aa20e2bc93559462f332cf2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 98daf64dca3777c31d79758da5efa5dd3057d017bc7e4e64186178c11b905513 [INFO] running `Command { std: "docker" "start" "-a" "98daf64dca3777c31d79758da5efa5dd3057d017bc7e4e64186178c11b905513", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.89 [INFO] [stderr] Compiling unicode-ident v1.0.13 [INFO] [stderr] Compiling libc v0.2.162 [INFO] [stderr] Compiling pin-project-lite v0.2.15 [INFO] [stderr] Compiling log v0.4.22 [INFO] [stderr] Compiling bytes v1.8.0 [INFO] [stderr] Compiling litemap v0.7.3 [INFO] [stderr] Compiling pkg-config v0.3.31 [INFO] [stderr] Compiling tracing-core v0.1.32 [INFO] [stderr] Compiling byteorder v1.5.0 [INFO] [stderr] Compiling serde v1.0.214 [INFO] [stderr] Compiling zstd-safe v7.2.1 [INFO] [stderr] Compiling hashbrown v0.15.1 [INFO] [stderr] Compiling futures-util v0.3.31 [INFO] [stderr] Compiling regex-automata v0.4.8 [INFO] [stderr] Compiling miniz_oxide v0.8.0 [INFO] [stderr] Compiling actix-service v2.0.2 [INFO] [stderr] Compiling actix-utils v3.0.1 [INFO] [stderr] Compiling digest v0.10.7 [INFO] [stderr] Compiling brotli-decompressor v4.0.1 [INFO] [stderr] Compiling cpufeatures v0.2.14 [INFO] [stderr] Compiling http v0.2.12 [INFO] [stderr] Compiling indexmap v2.6.0 [INFO] [stderr] Compiling bytestring v1.3.1 [INFO] [stderr] Compiling tracing v0.1.40 [INFO] [stderr] Compiling serde_json v1.0.132 [INFO] [stderr] Compiling sha1 v0.10.6 [INFO] [stderr] Compiling flate2 v1.0.34 [INFO] [stderr] Compiling time v0.3.36 [INFO] [stderr] Compiling language-tags v0.3.2 [INFO] [stderr] Compiling quote v1.0.37 [INFO] [stderr] Compiling impl-more v0.1.8 [INFO] [stderr] Compiling brotli v6.0.0 [INFO] [stderr] Compiling syn v2.0.87 [INFO] [stderr] Compiling jobserver v0.1.32 [INFO] [stderr] Compiling parking_lot_core v0.9.10 [INFO] [stderr] Compiling signal-hook-registry v1.4.2 [INFO] [stderr] Compiling mio v1.0.2 [INFO] [stderr] Compiling socket2 v0.5.7 [INFO] [stderr] Compiling getrandom v0.2.15 [INFO] [stderr] Compiling parking_lot v0.12.3 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling cc v1.1.36 [INFO] [stderr] Compiling tokio v1.41.1 [INFO] [stderr] Compiling regex v1.11.1 [INFO] [stderr] Compiling zstd-sys v2.0.13+zstd.1.5.6 [INFO] [stderr] Compiling cookie v0.16.2 [INFO] [stderr] Compiling actix-router v0.5.3 [INFO] [stderr] Compiling synstructure v0.13.1 [INFO] [stderr] Compiling zerofrom-derive v0.1.4 [INFO] [stderr] Compiling yoke-derive v0.7.4 [INFO] [stderr] Compiling zerovec-derive v0.10.3 [INFO] [stderr] Compiling displaydoc v0.2.5 [INFO] [stderr] Compiling icu_provider_macros v1.5.0 [INFO] [stderr] Compiling zerocopy-derive v0.7.35 [INFO] [stderr] Compiling serde_derive v1.0.214 [INFO] [stderr] Compiling derive_more v0.99.18 [INFO] [stderr] Compiling actix-web-codegen v4.3.0 [INFO] [stderr] Compiling actix-macros v0.2.4 [INFO] [stderr] Compiling tokio-util v0.7.12 [INFO] [stderr] Compiling actix-rt v2.10.0 [INFO] [stderr] Compiling zerocopy v0.7.35 [INFO] [stderr] Compiling zerofrom v0.1.4 [INFO] [stderr] Compiling actix-server v2.5.0 [INFO] [stderr] Compiling yoke v0.7.4 [INFO] [stderr] Compiling actix-codec v0.5.2 [INFO] [stderr] Compiling h2 v0.3.26 [INFO] [stderr] Compiling zerovec v0.10.4 [INFO] [stderr] Compiling ppv-lite86 v0.2.20 [INFO] [stderr] Compiling ahash v0.8.11 [INFO] [stderr] Compiling zstd v0.13.2 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling tinystr v0.7.6 [INFO] [stderr] Compiling icu_collections v1.5.0 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling icu_locid v1.5.0 [INFO] [stderr] Compiling icu_provider v1.5.0 [INFO] [stderr] Compiling icu_locid_transform v1.5.0 [INFO] [stderr] Compiling icu_properties v1.5.1 [INFO] [stderr] Compiling actix-http v3.9.0 [INFO] [stderr] Compiling icu_normalizer v1.5.0 [INFO] [stderr] Compiling serde_urlencoded v0.7.1 [INFO] [stderr] Compiling idna_adapter v1.2.0 [INFO] [stderr] Compiling idna v1.0.3 [INFO] [stderr] Compiling url v2.5.3 [INFO] [stderr] Compiling actix-web v4.9.0 [INFO] [stderr] Compiling rust-learning v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pointer_types.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut x = 42; [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: unused variable: `c` [INFO] [stdout] --> src/main.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let c = 30; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/main.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s = String::from("hello"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let s = "hello"; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `positive_sum` is never used [INFO] [stdout] --> src/positive_numbers_sum.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn positive_sum(arr: &[i32]) -> i32 { // fn positive_sum: Defines a function named positive_sum. [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/bin/ownership.rs:6:4 [INFO] [stdout] | [INFO] [stdout] 6 | fn change(some_string: &String) -> &String { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `heap_data` [INFO] [stdout] --> src/bin/memory_error.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let heap_data = vec![0u8; 1024 * 1024 * 1024]; // 1 GB heap allocation [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heap_data` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/bin/string_demo.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let b = &greeting; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/arrays_demo.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | let mut v = vec![10, 20, 30, 40, 50]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/bin/slices_demo.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let word = first_word_v1(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/slices_demo.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let s = "Hello, world!"; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/bin/slices_demo.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 10 | let word = first_word_v1(&my_string[0..6]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/slices_demo.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | let mut s = String::from("hello world"); [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/bin/arrays_demo.rs:39:9 [INFO] [stdout] | [INFO] [stdout] 39 | let mut v = vec![10, 20, 30, 40, 50]; [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: unused variable: `number` [INFO] [stdout] --> src/bin/data_types.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let number:i128 = 128; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `num` [INFO] [stdout] --> src/bin/data_types.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let num:u8 = 128; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_num` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `largest` [INFO] [stdout] --> src/bin/data_types.rs:67:9 [INFO] [stdout] | [INFO] [stdout] 67 | let largest = largest(&list); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_largest` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word` is never used [INFO] [stdout] --> src/bin/slices_demo.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn first_word(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `core::slice::::contains` that must be used [INFO] [stdout] --> src/bin/arrays_demo.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | lazy_caterer.contains(&12); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 5 | let _ = lazy_caterer.contains(&12); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_vector` is never used [INFO] [stdout] --> src/bin/data_types.rs:108:4 [INFO] [stdout] | [INFO] [stdout] 108 | fn build_vector() -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/webserver_demo.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 23 | / server [INFO] [stdout] 24 | | .bind("127.0.0.1:3000")? [INFO] [stdout] 25 | | .run() [INFO] [stdout] 26 | | .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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 23 | let _ = server [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 23s [INFO] running `Command { std: "docker" "inspect" "98daf64dca3777c31d79758da5efa5dd3057d017bc7e4e64186178c11b905513", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "98daf64dca3777c31d79758da5efa5dd3057d017bc7e4e64186178c11b905513", kill_on_drop: false }` [INFO] [stdout] 98daf64dca3777c31d79758da5efa5dd3057d017bc7e4e64186178c11b905513 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 442c746adaef9199dd7beb24d324da10e9a02c74533ff480bb3f47ebd559465b [INFO] running `Command { std: "docker" "start" "-a" "442c746adaef9199dd7beb24d324da10e9a02c74533ff480bb3f47ebd559465b", kill_on_drop: false }` [INFO] [stderr] Compiling rust-learning v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pointer_types.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut x = 42; [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: function `change` is never used [INFO] [stdout] --> src/bin/ownership.rs:6:4 [INFO] [stdout] | [INFO] [stdout] 6 | fn change(some_string: &String) -> &String { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `heap_data` [INFO] [stdout] --> src/bin/memory_error.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let heap_data = vec![0u8; 1024 * 1024 * 1024]; // 1 GB heap allocation [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heap_data` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/bin/string_demo.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let b = &greeting; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/arrays_demo.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | let mut v = vec![10, 20, 30, 40, 50]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/arrays_demo.rs:39:9 [INFO] [stdout] | [INFO] [stdout] 39 | let mut v = vec![10, 20, 30, 40, 50]; [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: unused return value of `core::slice::::contains` that must be used [INFO] [stdout] --> src/bin/arrays_demo.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | lazy_caterer.contains(&12); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 5 | let _ = lazy_caterer.contains(&12); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/bin/slices_demo.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let word = first_word_v1(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/slices_demo.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let s = "Hello, world!"; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/webserver_demo.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 23 | / server [INFO] [stdout] 24 | | .bind("127.0.0.1:3000")? [INFO] [stdout] 25 | | .run() [INFO] [stdout] 26 | | .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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 23 | let _ = server [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/bin/slices_demo.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 10 | let word = first_word_v1(&my_string[0..6]); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/slices_demo.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | let mut s = String::from("hello world"); [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: function `first_word` is never used [INFO] [stdout] --> src/bin/slices_demo.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn first_word(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/main.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let c = 30; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/main.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s = String::from("hello"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `number` [INFO] [stdout] --> src/bin/data_types.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let number:i128 = 128; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let s = "hello"; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `num` [INFO] [stdout] --> src/bin/data_types.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let num:u8 = 128; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_num` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `largest` [INFO] [stdout] --> src/bin/data_types.rs:67:9 [INFO] [stdout] | [INFO] [stdout] 67 | let largest = largest(&list); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_largest` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_vector` is never used [INFO] [stdout] --> src/bin/data_types.rs:108:4 [INFO] [stdout] | [INFO] [stdout] 108 | fn build_vector() -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.17s [INFO] running `Command { std: "docker" "inspect" "442c746adaef9199dd7beb24d324da10e9a02c74533ff480bb3f47ebd559465b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "442c746adaef9199dd7beb24d324da10e9a02c74533ff480bb3f47ebd559465b", kill_on_drop: false }` [INFO] [stdout] 442c746adaef9199dd7beb24d324da10e9a02c74533ff480bb3f47ebd559465b