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[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/YoruAi/RustStudy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYoruAi%2FRustStudy", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3520973f0097d52a13779d1137493ca9e422d5c0
[INFO] checking YoruAi/RustStudy against 5c543b0b8c73c7b72bc8284ced4fb22ead15734d for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYoruAi%2FRustStudy" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/YoruAi/RustStudy on toolchain 5c543b0b8c73c7b72bc8284ced4fb22ead15734d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "eefc2f90ca78afc575d8251f9e9936a287118330da73a37fe2036a2c2c149daa" "/opt/rustwide/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eefc2f90ca78afc575d8251f9e9936a287118330da73a37fe2036a2c2c149daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "eefc2f90ca78afc575d8251f9e9936a287118330da73a37fe2036a2c2c149daa" "/opt/rustwide/cargo-home/bin/cargo" "+5c543b0b8c73c7b72bc8284ced4fb22ead15734d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> chapter11-tests/src/bin/tests.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn add(a: u32, b: u32) -> u32 {
[INFO] [stdout]    |    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chapter13-functional-features v0.1.0 (/opt/rustwide/workdir/chapter13-functional-features)
[INFO] [stdout] warning: unused variable: `closure`
[INFO] [stdout]  --> chapter13-functional-features/src/bin/closures.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let closure = |num: u32| -> u32 { num };
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_closure`
[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]  --> chapter13-functional-features/src/bin/closures.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s = closure(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: `closure`
[INFO] [stdout]  --> chapter13-functional-features/src/bin/closures.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let closure = |num: u32| -> u32 { num };
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_closure`
[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]  --> chapter13-functional-features/src/bin/closures.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s = closure(String::from("hello"));
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking appendix v0.1.0 (/opt/rustwide/workdir/appendix)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> chapter13-functional-features/src/bin/iterator.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut v1 = vec![1, 2, 3];
[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]   --> chapter13-functional-features/src/bin/iterator.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut v1 = vec![1, 2, 3];
[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: `v1_iter`
[INFO] [stdout]  --> chapter13-functional-features/src/bin/iterator.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let v1_iter = v1.iter(); // &
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v1_iter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v1_iter`
[INFO] [stdout]  --> chapter13-functional-features/src/bin/iterator.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let v1_iter = v1.iter(); // &
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v1_iter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v1_iter`
[INFO] [stdout]  --> chapter13-functional-features/src/bin/iterator.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let v1_iter = v1.iter_mut(); // &mut
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v1_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v1_iter`
[INFO] [stdout]  --> chapter13-functional-features/src/bin/iterator.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let v1_iter = v1.iter_mut(); // &mut
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v1_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> chapter13-functional-features/src/bin/iterator.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let count = v1.iter().count();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `collect`
[INFO] [stdout]   --> chapter13-functional-features/src/bin/iterator.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let collect: Vec<i32> = v1.iter().copied().collect();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_collect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> chapter13-functional-features/src/bin/iterator.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let count = v1.iter().count();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `collect`
[INFO] [stdout]   --> chapter13-functional-features/src/bin/iterator.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let collect: Vec<i32> = v1.iter().copied().collect();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_collect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chapter04-ownership v0.1.0 (/opt/rustwide/workdir/chapter04-ownership)
[INFO] [stderr]     Checking chapter19-patterns-and-matching v0.1.0 (/opt/rustwide/workdir/chapter19-patterns-and-matching)
[INFO] [stderr]     Checking chapter03-common-concepts v0.1.0 (/opt/rustwide/workdir/chapter03-common-concepts)
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> appendix/src/bin/c.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     struct Point {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chapter05-structs v0.1.0 (/opt/rustwide/workdir/chapter05-structs)
[INFO] [stderr]     Checking chapter15-smart-pointer v0.1.0 (/opt/rustwide/workdir/chapter15-smart-pointer)
[INFO] [stderr]     Checking chapter07-crates-and-modules v0.1.0 (/opt/rustwide/workdir/chapter07-crates-and-modules)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let Point { x: a, y: b } = p;
[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] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:42:26
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let Point { x: a, y: b } = p;
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:43:17
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let Point { x, y } = p; // shorthand
[INFO] [stdout]    |                 ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:43:20
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let Point { x, y } = p; // shorthand
[INFO] [stdout]    |                    ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feet`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:84:11
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |           ^^^^ help: if this is intentional, prefix it with an underscore: `_feet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inches`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_inches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:84:34
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                                  ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:84:37
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                                     ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:92:10
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let (a, .., d) = (1, 2, 3, 4); // ignore remaining parts of a value(unambiguous)
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let (a, .., d) = (1, 2, 3, 4); // ignore remaining parts of a value(unambiguous)
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     enum Color {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 55 |         Rgb(i32, 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: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     enum Message {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 59 |         Quit,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 60 |         Move { x: i32, y: i32 },
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 61 |         Write(String),
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chapter09-error v0.1.0 (/opt/rustwide/workdir/chapter09-error)
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/pattern_syntax.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn foo(_: i32, y: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chapter14-cargo v0.1.0 (/opt/rustwide/workdir/chapter14-cargo)
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> chapter09-error/src/bin/panic.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let home: IpAddr = "127.0.0.1"
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zerocopy` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/5c543b0b8c73c7b72bc8284ced4fb22ead15734d/bin/rustc --crate-name zerocopy --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/zerocopy-0.8.39/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -C embed-bitcode=no --cfg 'feature="simd"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("__internal_use_only_features_that_work_on_stable", "alloc", "derive", "float-nightly", "simd", "simd-nightly", "std", "zerocopy-derive"))' -C metadata=2cd9f1978416128d -C extra-filename=-d8c36266f71551c5 --out-dir /opt/rustwide/target/debug/build/zerocopy/d8c36266f71551c5/out --cap-lints allow --cap-lints=forbid --force-warn=unused_crate_dependencies --check-cfg 'cfg(no_zerocopy_simd_x86_avx12_1_89_0)' --check-cfg 'cfg(rust, values("1.89.0"))' --check-cfg 'cfg(no_zerocopy_core_error_1_81_0)' --check-cfg 'cfg(rust, values("1.81.0"))' --check-cfg 'cfg(no_zerocopy_diagnostic_on_unimplemented_1_78_0)' --check-cfg 'cfg(rust, values("1.78.0"))' --check-cfg 'cfg(no_zerocopy_generic_bounds_in_const_fn_1_61_0)' --check-cfg 'cfg(rust, values("1.61.0"))' --check-cfg 'cfg(no_zerocopy_target_has_atomics_1_60_0)' --check-cfg 'cfg(rust, values("1.60.0"))' --check-cfg 'cfg(no_zerocopy_aarch64_simd_1_59_0)' --check-cfg 'cfg(rust, values("1.59.0"))' --check-cfg 'cfg(no_zerocopy_panic_in_const_and_vec_try_reserve_1_57_0)' --check-cfg 'cfg(rust, values("1.57.0"))' --check-cfg 'cfg(doc_cfg)' --check-cfg 'cfg(kani)' --check-cfg 'cfg(__ZEROCOPY_INTERNAL_USE_ONLY_NIGHTLY_FEATURES_IN_TESTS)' --check-cfg 'cfg(__ZEROCOPY_INTERNAL_USE_ONLY_DEV_MODE)' --check-cfg 'cfg(coverage_nightly)'` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> chapter15-smart-pointer/src/bin/ptr_weak.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |         Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout]    |         ---- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field 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 field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 11 -         Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout] 11 +         Cons((), RefCell<Rc<List>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> chapter15-smart-pointer/src/bin/ptr_weak.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     struct Node {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 24 |         value: i32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 25 |         parent: RefCell<Weak<Node>>,
[INFO] [stdout] 26 |         children: RefCell<Vec<Rc<Node>>>,
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 |     if let Some(i) = x {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let Some(i) = x else {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:17:20
[INFO] [stdout]    |
[INFO] [stdout] 17 |     while let Some(i) = x {
[INFO] [stdout]    |                    ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for (index, value) in v.iter().enumerate() {}
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |     for (index, value) in v.iter().enumerate() {}
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let (x, y) = (1, 2);
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let (x, y) = (1, 2);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:25:22
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn coordinates(&(x, y): &(i32, i32)) {}
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> chapter19-patterns-and-matching/src/bin/patterns_places.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn coordinates(&(x, y): &(i32, i32)) {}
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "eefc2f90ca78afc575d8251f9e9936a287118330da73a37fe2036a2c2c149daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eefc2f90ca78afc575d8251f9e9936a287118330da73a37fe2036a2c2c149daa", kill_on_drop: false }`
[INFO] [stdout] eefc2f90ca78afc575d8251f9e9936a287118330da73a37fe2036a2c2c149daa
