[INFO] cloning repository https://github.com/Joel-Ajayi/Rust_learning_track [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Joel-Ajayi/Rust_learning_track" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoel-Ajayi%2FRust_learning_track", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoel-Ajayi%2FRust_learning_track'... 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[INFO] started tweaking git repo https://github.com/Joel-Ajayi/Rust_learning_track [INFO] finished tweaking git repo https://github.com/Joel-Ajayi/Rust_learning_track [INFO] tweaked toml for git repo https://github.com/Joel-Ajayi/Rust_learning_track written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Joel-Ajayi/Rust_learning_track on toolchain 9e293ae9f8abecb0be5105787d181518c9012a19 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e293ae9f8abecb0be5105787d181518c9012a19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Joel-Ajayi/Rust_learning_track 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" "+9e293ae9f8abecb0be5105787d181518c9012a19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... 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"/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+9e293ae9f8abecb0be5105787d181518c9012a19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ffc947ad779b95b37751131dc09c24a7094e63ef7b3338a665a1ae085acd63b8 [INFO] running `Command { std: "docker" "start" "-a" "ffc947ad779b95b37751131dc09c24a7094e63ef7b3338a665a1ae085acd63b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ffc947ad779b95b37751131dc09c24a7094e63ef7b3338a665a1ae085acd63b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ffc947ad779b95b37751131dc09c24a7094e63ef7b3338a665a1ae085acd63b8", kill_on_drop: false }` [INFO] [stdout] ffc947ad779b95b37751131dc09c24a7094e63ef7b3338a665a1ae085acd63b8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+9e293ae9f8abecb0be5105787d181518c9012a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1 [INFO] running `Command { std: "docker" "start" "-a" "2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.101 [INFO] [stderr] Compiling unicode-ident v1.0.19 [INFO] [stderr] Compiling quote v1.0.41 [INFO] [stderr] Compiling libc v0.2.176 [INFO] [stderr] Compiling zerocopy v0.8.27 [INFO] [stderr] Checking cfg-if v1.0.3 [INFO] [stderr] Compiling find-msvc-tools v0.1.4 [INFO] [stderr] Checking futures-sink v0.3.31 [INFO] [stderr] Compiling serde_core v1.0.228 [INFO] [stderr] Compiling serde v1.0.228 [INFO] [stderr] Checking memchr v2.7.6 [INFO] [stderr] Checking futures-io v0.3.31 [INFO] [stderr] Checking slab v0.4.11 [INFO] [stderr] Checking phf_shared v0.11.3 [INFO] [stderr] Compiling siphasher v0.3.11 [INFO] [stderr] Checking futures-channel v0.3.31 [INFO] [stderr] Compiling icu_properties_data v2.1.1 [INFO] [stderr] Checking zeroize v1.8.2 [INFO] [stderr] Checking log v0.4.28 [INFO] [stderr] Compiling rustls v0.23.35 [INFO] [stderr] Compiling cc v1.2.45 [INFO] [stderr] Checking rustls-pki-types v1.13.0 [INFO] [stderr] Checking tracing-core v0.1.34 [INFO] [stderr] Checking bitflags v2.9.4 [INFO] [stderr] Compiling phf_shared v0.10.0 [INFO] [stderr] Checking dtoa v1.0.10 [INFO] [stderr] Compiling getrandom v0.3.4 [INFO] [stderr] Compiling ahash v0.8.12 [INFO] [stderr] Checking fxhash v0.2.1 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[stderr] Compiling phf_codegen v0.10.0 [INFO] [stderr] Compiling phf_codegen v0.11.3 [INFO] [stderr] Compiling string_cache_codegen v0.5.4 [INFO] [stderr] Compiling selectors v0.25.0 [INFO] [stderr] Compiling markup5ever v0.12.1 [INFO] [stderr] Compiling synstructure v0.13.2 [INFO] [stderr] Compiling zerovec-derive v0.11.2 [INFO] [stderr] Compiling displaydoc v0.2.5 [INFO] [stderr] Compiling tokio-macros v2.5.0 [INFO] [stderr] Compiling serde_derive v1.0.228 [INFO] [stderr] Compiling futures-macro v0.3.31 [INFO] [stderr] Compiling phf_macros v0.11.3 [INFO] [stderr] Compiling cssparser-macros v0.6.1 [INFO] [stderr] Compiling html5ever v0.27.0 [INFO] [stderr] Compiling derive_more v0.99.20 [INFO] [stderr] Compiling hello_macro_derive v0.1.0 (/opt/rustwide/workdir/hello_macro/hello_macro_derive) [INFO] [stderr] Compiling zerofrom-derive v0.1.6 [INFO] [stderr] Compiling yoke-derive v0.8.1 [INFO] [stderr] Checking tokio v1.47.1 [INFO] [stderr] Checking phf v0.11.3 [INFO] [stderr] Checking cssparser v0.31.2 [INFO] [stderr] Checking futures-util v0.3.31 [INFO] [stderr] Checking rustls-webpki v0.103.8 [INFO] [stderr] Checking zerofrom v0.1.6 [INFO] [stderr] Checking yoke v0.8.1 [INFO] [stderr] Checking zerovec v0.11.5 [INFO] [stderr] Checking zerotrie v0.2.3 [INFO] [stderr] Checking tinystr v0.8.2 [INFO] [stderr] Checking potential_utf v0.1.4 [INFO] [stderr] Checking icu_collections v2.1.1 [INFO] [stderr] Checking icu_locale_core v2.1.1 [INFO] [stderr] Checking icu_provider v2.1.1 [INFO] [stderr] Checking string_cache v0.8.9 [INFO] [stderr] Checking serde_urlencoded v0.7.1 [INFO] [stderr] Checking icu_normalizer v2.1.1 [INFO] [stderr] Checking icu_properties v2.1.1 [INFO] [stderr] Checking futures-executor v0.3.31 [INFO] [stderr] Checking futures v0.3.31 [INFO] [stderr] Checking idna_adapter v1.2.1 [INFO] [stderr] Checking idna v1.1.0 [INFO] [stderr] Checking url v2.5.7 [INFO] [stderr] Checking hyper v1.7.0 [INFO] [stderr] Checking tokio-rustls v0.26.4 [INFO] [stderr] Checking tower v0.5.2 [INFO] [stderr] Checking tokio-stream v0.1.17 [INFO] [stderr] Checking scraper v0.20.0 [INFO] [stderr] Checking tower-http v0.6.6 [INFO] [stderr] Checking hyper-util v0.1.17 [INFO] [stderr] Checking hyper-rustls v0.27.7 [INFO] [stderr] Checking reqwest v0.12.24 [INFO] [stderr] Checking trpl v0.3.0 [INFO] [stderr] Checking first_learn v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `list_of_strings` [INFO] [stdout] --> examples/advanced_funcs.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let list_of_strings: Vec = list_of_numbers.iter().map(|i| i.to_string()).collect(); [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_strings` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> examples/advanced_funcs.rs:27:24 [INFO] [stdout] | [INFO] [stdout] 27 | fn returns_closure(a: i32) -> impl Fn(i32) -> i32 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `add_one` is never used [INFO] [stdout] --> examples/advanced_funcs.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn add_one(x: i32) -> i32 { [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 `do_twice` is never used [INFO] [stdout] --> examples/advanced_funcs.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn do_twice(f: T, arg: i32) -> i32 [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main1` is never used [INFO] [stdout] --> examples/advanced_funcs.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn main1() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main2` is never used [INFO] [stdout] --> examples/advanced_funcs.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn main2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `returns_closure` is never used [INFO] [stdout] --> examples/advanced_funcs.rs:27:8 [INFO] [stdout] | [INFO] [stdout] 27 | fn returns_closure(a: i32) -> impl Fn(i32) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `return_optional_closures` is never used [INFO] [stdout] --> examples/advanced_funcs.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | fn return_optional_closures(a: i32) -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `screen` [INFO] [stdout] --> examples/oop_traits.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let screen = Screen { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_screen` [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] --> examples/smart_pointers.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let b = Box::new(5); [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: `list` [INFO] [stdout] --> examples/smart_pointers.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let list = Cons(1, Box::new(Nil)); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> examples/smart_pointers.rs:14:10 [INFO] [stdout] | [INFO] [stdout] 14 | Cons(i32, Box), [INFO] [stdout] | ---- ^^^ ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this variant [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stdout] | [INFO] [stdout] 14 - Cons(i32, Box), [INFO] [stdout] 14 + Cons((), ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main1` is never used [INFO] [stdout] --> examples/concurrency_share_state.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn main1() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `counterClone` should have a snake case name [INFO] [stdout] --> examples/concurrency_share_state.rs:23:13 [INFO] [stdout] | [INFO] [stdout] 23 | let counterClone = counter.clone(); [INFO] [stdout] | ^^^^^^^^^^^^ help: convert the identifier to snake case: `counter_clone` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `futures::future::Select` [INFO] [stdout] --> examples/traits_advanced.rs:49:5 [INFO] [stdout] | [INFO] [stdout] 49 | use futures::future::Select; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Counter` is never constructed [INFO] [stdout] --> examples/traits_advanced.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 9 | struct Counter {} [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 `main1` is never used [INFO] [stdout] --> examples/traits_advanced.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn main1() {} [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> examples/traits_advanced.rs:51:8 [INFO] [stdout] | [INFO] [stdout] 51 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main2` is never used [INFO] [stdout] --> examples/traits_advanced.rs:73:4 [INFO] [stdout] | [INFO] [stdout] 73 | fn main2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Pilot` is never used [INFO] [stdout] --> examples/traits_advanced.rs:81:7 [INFO] [stdout] | [INFO] [stdout] 81 | trait Pilot { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Wizard` is never used [INFO] [stdout] --> examples/traits_advanced.rs:85:7 [INFO] [stdout] | [INFO] [stdout] 85 | trait Wizard { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Human` is never constructed [INFO] [stdout] --> examples/traits_advanced.rs:89:8 [INFO] [stdout] | [INFO] [stdout] 89 | struct Human; [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `fly` is never used [INFO] [stdout] --> examples/traits_advanced.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 103 | impl Human { [INFO] [stdout] | ---------- method in this implementation [INFO] [stdout] 104 | fn fly(&self) { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main3` is never used [INFO] [stdout] --> examples/traits_advanced.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn main3() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Wrapper` is never constructed [INFO] [stdout] --> examples/traits_advanced.rs:154:8 [INFO] [stdout] | [INFO] [stdout] 154 | struct Wrapper(Vec); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> examples/smart_pointers_memory_leak.rs:50:5 [INFO] [stdout] | [INFO] [stdout] 49 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 50 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 51 | parent: RefCell>, [INFO] [stdout] 52 | children: RefCell>>, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> examples/smart_pointers_counting.rs:10:10 [INFO] [stdout] | [INFO] [stdout] 10 | Cons(Rc>, Rc), [INFO] [stdout] | ---- ^^^^^^^^^^^^^^^^ ^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stdout] | [INFO] [stdout] 10 - Cons(Rc>, Rc), [INFO] [stdout] 10 + Cons((), ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> examples/types_advanced.rs:6:24 [INFO] [stdout] | [INFO] [stdout] 6 | fn takes_long_type(f: Thunk) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> examples/types_advanced.rs:19:23 [INFO] [stdout] | [INFO] [stdout] 19 | fn generic(t: &T) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> examples/types_advanced.rs:24:9 [INFO] [stdout] | [INFO] [stdout] 24 | let s1: &str = "Hello there!"; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> examples/types_advanced.rs:25:9 [INFO] [stdout] | [INFO] [stdout] 25 | let s2: &str = "How's it going?"; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main2` is never used [INFO] [stdout] --> examples/types_advanced.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn main2() { [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 `generic` is never used [INFO] [stdout] --> examples/types_advanced.rs:19:4 [INFO] [stdout] | [INFO] [stdout] 19 | fn generic(t: &T) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> examples/patterns_matching.rs:20:9 [INFO] [stdout] | [INFO] [stdout] 20 | let x: i32 = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `English`, `Russian`, and `Japanese` are never constructed [INFO] [stdout] --> examples/patterns_matching.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 2 | enum Language { [INFO] [stdout] | -------- variants in this enum [INFO] [stdout] 3 | English, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 4 | Spanish, [INFO] [stdout] 5 | Russian, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 6 | Japanese, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Language` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning[E0133]: use of mutable static is unsafe and requires unsafe block [INFO] [stdout] --> examples/unsafe.rs:82:5 [INFO] [stdout] | [INFO] [stdout] 82 | COUNTER += inc; [INFO] [stdout] | ^^^^^^^ use of mutable static [INFO] [stdout] | [INFO] [stdout] = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior [INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default [INFO] [stdout] --> examples/unsafe.rs:81:1 [INFO] [stdout] | [INFO] [stdout] 81 | unsafe fn add_to_count(inc: u32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(unsafe_op_in_unsafe_fn)]` (part of `#[warn(rust_2024_compatibility)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main1` is never used [INFO] [stdout] --> examples/unsafe.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn main1() { [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 `split_at_mut` is never used [INFO] [stdout] --> examples/unsafe.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main2` is never used [INFO] [stdout] --> examples/unsafe.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn main2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `abs` is never used [INFO] [stdout] --> examples/unsafe.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 53 | fn abs(input: i32) -> i32; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `core::slice::::split_at_mut` that must be used [INFO] [stdout] --> examples/unsafe.rs:31:5 [INFO] [stdout] | [INFO] [stdout] 31 | r.split_at_mut(1); [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] 31 | let _ = r.split_at_mut(1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0133`. [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> examples/smart_pointers_drop.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let a = CustomSmartPointer { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 40.85s [INFO] running `Command { std: "docker" "inspect" "2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1", kill_on_drop: false }` [INFO] [stdout] 2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1