[INFO] cloning repository https://github.com/wanken/rust-starter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wanken/rust-starter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwanken%2Frust-starter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwanken%2Frust-starter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e41d3b448315e63560bbf0de8a6176b58e9e0ffd
[INFO] checking wanken/rust-starter against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwanken%2Frust-starter" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
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[INFO] started tweaking git repo https://github.com/wanken/rust-starter
[INFO] finished tweaking git repo https://github.com/wanken/rust-starter
[INFO] tweaked toml for git repo https://github.com/wanken/rust-starter written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wanken/rust-starter on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wanken/rust-starter 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07b64beac431e5323bddb9f2dfa757e95cac87c3861ec71b5c3c6c68da456c6b
[INFO] running `Command { std: "docker" "start" "-a" "07b64beac431e5323bddb9f2dfa757e95cac87c3861ec71b5c3c6c68da456c6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07b64beac431e5323bddb9f2dfa757e95cac87c3861ec71b5c3c6c68da456c6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07b64beac431e5323bddb9f2dfa757e95cac87c3861ec71b5c3c6c68da456c6b", kill_on_drop: false }`
[INFO] [stdout] 07b64beac431e5323bddb9f2dfa757e95cac87c3861ec71b5c3c6c68da456c6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 477508de945e96641685b01830ca706f9404e9fb4b3a76ea6a60096c8b868559
[INFO] running `Command { std: "docker" "start" "-a" "477508de945e96641685b01830ca706f9404e9fb4b3a76ea6a60096c8b868559", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-starter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/flow_control.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |         'inner2: loop {
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/flow_control.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for name in &names {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/flow_control.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     for n in numbers {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/flow_control.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let mut n = 1;
[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: `i`
[INFO] [stdout]   --> src/flow_control.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     for i in 0..=100 {
[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]    --> src/flow_control.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     for i in 0..=100 {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `integer`
[INFO] [stdout]   --> src/generic.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let integer = Point { x: 5, y: 10 };
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `float`
[INFO] [stdout]   --> src/generic.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let float = Point { x: 1.0, y: 4.0 };
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/generic.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let p = Point1 { x: 5, y: "hello".to_string() };
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/traits.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn some_function<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/traits.rs:55:31
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn some_function<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/flow_control.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |         'inner2: loop {
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn test() {
[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 `q1` is never used
[INFO] [stdout]  --> src/flow_control.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn q1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q2` is never used
[INFO] [stdout]   --> src/flow_control.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn q2() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q3` is never used
[INFO] [stdout]   --> src/flow_control.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn q3() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q4` is never used
[INFO] [stdout]   --> src/flow_control.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn q4() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q5` is never used
[INFO] [stdout]   --> src/flow_control.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn q5() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q6` is never used
[INFO] [stdout]   --> src/flow_control.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn q6() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q7` is never used
[INFO] [stdout]   --> src/flow_control.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn q7() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q8` is never used
[INFO] [stdout]    --> src/flow_control.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn q8() {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q9` is never used
[INFO] [stdout]    --> src/flow_control.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn q9() {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q10` is never used
[INFO] [stdout]    --> src/flow_control.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub fn q10() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q11` is never used
[INFO] [stdout]    --> src/flow_control.rs:164:8
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn q11() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]  --> src/generic.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn test() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `A` is never constructed
[INFO] [stdout]   --> src/generic.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct A;
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S` is never constructed
[INFO] [stdout]   --> src/generic.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct S(A);
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SGen` is never constructed
[INFO] [stdout]   --> src/generic.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct SGen<T>(T); // 泛型 `SGen`.
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reg_fn` is never used
[INFO] [stdout]   --> src/generic.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn reg_fn(_s: S) {}
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_spec_t` is never used
[INFO] [stdout]   --> src/generic.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn gen_spec_t(_s: SGen<A>) {}
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_spec_i32` is never used
[INFO] [stdout]   --> src/generic.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn gen_spec_i32(_s: SGen<i32>) {}
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic` is never used
[INFO] [stdout]   --> src/generic.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn generic<T>(_s: SGen<T>) {}
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/generic.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]   --> src/generic.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn sum<T: std::ops::Add<Output=T>>(a: T, b: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_sum` is never used
[INFO] [stdout]   --> src/generic.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn test_sum() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/generic.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_impl_generic` is never used
[INFO] [stdout]   --> src/generic.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn test_impl_generic() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point1` is never constructed
[INFO] [stdout]   --> src/generic.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | struct Point1<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_different_generic` is never used
[INFO] [stdout]   --> src/generic.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn test_different_generic() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Val` is never constructed
[INFO] [stdout]   --> src/generic.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | struct Val<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/generic.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl<T> Val<T> {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 86 |     fn value(&self) -> &T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q3` is never used
[INFO] [stdout]   --> src/generic.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn q3() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point2` is never constructed
[INFO] [stdout]   --> src/generic.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | struct Point2<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix_up` is never used
[INFO] [stdout]    --> src/generic.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | impl<T, U> Point2<T, U> {
[INFO] [stdout]     | ----------------------- method in this implementation
[INFO] [stdout] 105 |     // 实现 mixup，不要修改其它代码！
[INFO] [stdout] 106 |     fn mix_up<V, W>(self, p: Point2<V, W>) -> Point2<T, W> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q6` is never used
[INFO] [stdout]    --> src/generic.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout] 114 | pub fn q6() {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/method.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `origin` and `new` are never used
[INFO] [stdout]   --> src/method.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Point {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout]  8 |     // 关联函数的使用方法跟构造器非常类似
[INFO] [stdout]  9 |     fn origin() -> Point {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn new(x: f64, y: f64) -> Point {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/method.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> src/method.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn area(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q1` is never used
[INFO] [stdout]  --> src/pattern_match_match.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn q1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/traits.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Post {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/traits.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/traits.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 50 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/traits.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn some_function<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_summariazble` is never used
[INFO] [stdout]   --> src/traits.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn return_summariazble() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/flow_control.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for name in &names {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/flow_control.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     for n in numbers {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/flow_control.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let mut n = 1;
[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: `i`
[INFO] [stdout]   --> src/flow_control.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     for i in 0..=100 {
[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]    --> src/flow_control.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     for i in 0..=100 {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `integer`
[INFO] [stdout]   --> src/generic.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let integer = Point { x: 5, y: 10 };
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `float`
[INFO] [stdout]   --> src/generic.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let float = Point { x: 1.0, y: 4.0 };
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/generic.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let p = Point1 { x: 5, y: "hello".to_string() };
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/traits.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn some_function<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/traits.rs:55:31
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn some_function<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn test() {
[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 `q1` is never used
[INFO] [stdout]  --> src/flow_control.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn q1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q2` is never used
[INFO] [stdout]   --> src/flow_control.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn q2() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q3` is never used
[INFO] [stdout]   --> src/flow_control.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn q3() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q4` is never used
[INFO] [stdout]   --> src/flow_control.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn q4() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q5` is never used
[INFO] [stdout]   --> src/flow_control.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn q5() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q6` is never used
[INFO] [stdout]   --> src/flow_control.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn q6() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q7` is never used
[INFO] [stdout]   --> src/flow_control.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn q7() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q8` is never used
[INFO] [stdout]    --> src/flow_control.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn q8() {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q9` is never used
[INFO] [stdout]    --> src/flow_control.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn q9() {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q10` is never used
[INFO] [stdout]    --> src/flow_control.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub fn q10() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q11` is never used
[INFO] [stdout]    --> src/flow_control.rs:164:8
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn q11() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]  --> src/generic.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn test() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `A` is never constructed
[INFO] [stdout]   --> src/generic.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct A;
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S` is never constructed
[INFO] [stdout]   --> src/generic.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct S(A);
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SGen` is never constructed
[INFO] [stdout]   --> src/generic.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct SGen<T>(T); // 泛型 `SGen`.
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reg_fn` is never used
[INFO] [stdout]   --> src/generic.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn reg_fn(_s: S) {}
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_spec_t` is never used
[INFO] [stdout]   --> src/generic.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn gen_spec_t(_s: SGen<A>) {}
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_spec_i32` is never used
[INFO] [stdout]   --> src/generic.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn gen_spec_i32(_s: SGen<i32>) {}
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic` is never used
[INFO] [stdout]   --> src/generic.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn generic<T>(_s: SGen<T>) {}
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/generic.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]   --> src/generic.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn sum<T: std::ops::Add<Output=T>>(a: T, b: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_sum` is never used
[INFO] [stdout]   --> src/generic.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn test_sum() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/generic.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_impl_generic` is never used
[INFO] [stdout]   --> src/generic.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn test_impl_generic() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point1` is never constructed
[INFO] [stdout]   --> src/generic.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | struct Point1<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_different_generic` is never used
[INFO] [stdout]   --> src/generic.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn test_different_generic() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Val` is never constructed
[INFO] [stdout]   --> src/generic.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | struct Val<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/generic.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl<T> Val<T> {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 86 |     fn value(&self) -> &T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q3` is never used
[INFO] [stdout]   --> src/generic.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn q3() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point2` is never constructed
[INFO] [stdout]   --> src/generic.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | struct Point2<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix_up` is never used
[INFO] [stdout]    --> src/generic.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | impl<T, U> Point2<T, U> {
[INFO] [stdout]     | ----------------------- method in this implementation
[INFO] [stdout] 105 |     // 实现 mixup，不要修改其它代码！
[INFO] [stdout] 106 |     fn mix_up<V, W>(self, p: Point2<V, W>) -> Point2<T, W> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q6` is never used
[INFO] [stdout]    --> src/generic.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout] 114 | pub fn q6() {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/method.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `origin` and `new` are never used
[INFO] [stdout]   --> src/method.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Point {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout]  8 |     // 关联函数的使用方法跟构造器非常类似
[INFO] [stdout]  9 |     fn origin() -> Point {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn new(x: f64, y: f64) -> Point {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/method.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> src/method.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn area(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `q1` is never used
[INFO] [stdout]  --> src/pattern_match_match.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn q1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/traits.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Post {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/traits.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/traits.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 50 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/traits.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn some_function<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_summariazble` is never used
[INFO] [stdout]   --> src/traits.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn return_summariazble() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "477508de945e96641685b01830ca706f9404e9fb4b3a76ea6a60096c8b868559", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "477508de945e96641685b01830ca706f9404e9fb4b3a76ea6a60096c8b868559", kill_on_drop: false }`
[INFO] [stdout] 477508de945e96641685b01830ca706f9404e9fb4b3a76ea6a60096c8b868559