[INFO] cloning repository https://github.com/breakinferno/learn-rust-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/breakinferno/learn-rust-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreakinferno%2Flearn-rust-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreakinferno%2Flearn-rust-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 120c62dcfed0a2c273a142b22b81158cadc8377f
[INFO] testing breakinferno/learn-rust-demo against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreakinferno%2Flearn-rust-demo" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/breakinferno/learn-rust-demo on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/breakinferno/learn-rust-demo
[INFO] finished tweaking git repo https://github.com/breakinferno/learn-rust-demo
[INFO] tweaked toml for git repo https://github.com/breakinferno/learn-rust-demo written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/breakinferno/learn-rust-demo 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8889f660c4bf274c7dd74c61199866d2ec4a080091eaed5113576edb5fb2f91a
[INFO] running `Command { std: "docker" "start" "-a" "8889f660c4bf274c7dd74c61199866d2ec4a080091eaed5113576edb5fb2f91a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8889f660c4bf274c7dd74c61199866d2ec4a080091eaed5113576edb5fb2f91a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8889f660c4bf274c7dd74c61199866d2ec4a080091eaed5113576edb5fb2f91a", kill_on_drop: false }`
[INFO] [stdout] 8889f660c4bf274c7dd74c61199866d2ec4a080091eaed5113576edb5fb2f91a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c2133318f26c73cef4fddb680ac2cdd1980da9568fc4d5cf8fae89c69e315a7
[INFO] running `Command { std: "docker" "start" "-a" "9c2133318f26c73cef4fddb680ac2cdd1980da9568fc4d5cf8fae89c69e315a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]    Compiling macro_define_crate v0.1.0 (/opt/rustwide/workdir/macro_define_crate)
[INFO] [stdout] warning: unused imports: `Attribute`, `parse_macro_input`
[INFO] [stdout]  --> macro_define_crate/src/lib.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use syn::{parse_macro_input, Attribute};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `b` should have an upper camel case name
[INFO] [stdout]    --> src/main.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 |     b(i32),
[INFO] [stdout]     |     ^ help: convert the identifier to upper camel case: `B`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:47:34
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:43:27
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:52:56
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |                                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:56:46
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/mytrait.rs:56:55
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:14:28
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lifecycle.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:33:53
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/lifecycle.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/closure.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut x = add(5,7);
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/closure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     x = bo(5,7);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_statues`
[INFO] [stdout]   --> src/closure.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let list_of_statues: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statues`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]    --> src/main.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let d = demod::Demo {x:2};
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut st2 = "字符串字面值".to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]    --> src/main.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 122 | struct Point<T, U> {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] 123 |     x: T,
[INFO] [stdout] 124 |     y: U
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `y` is never used
[INFO] [stdout]    --> src/main.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T, U> Point<T, U> {// 针对类型T U实现方法
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |     fn y(&self) -> &U {
[INFO] [stdout]     |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/main.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 142 | impl<T: Display + PartialOrd, U> Point<T, U> {
[INFO] [stdout]     | -------------------------------------------- method in this implementation
[INFO] [stdout] 143 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MyEnum` is never used
[INFO] [stdout]    --> src/main.rs:157:6
[INFO] [stdout]     |
[INFO] [stdout] 157 | enum MyEnum<T> {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_open_file` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn test_open_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/mytrait.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn notify(item: impl Summary, item2: impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn notify_trait_bounds<T: Summary>(item: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait` is never used
[INFO] [stdout]   --> src/mytrait.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_return` is never used
[INFO] [stdout]   --> src/mytrait.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds_where` is never used
[INFO] [stdout]   --> src/mytrait.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lifecycle` is never constructed
[INFO] [stdout]  --> src/lifecycle.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Lifecycle<'a> {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/lifecycle.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `life`, `method_no_omit_lifecycle`, and `method` are never used
[INFO] [stdout]   --> src/lifecycle.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a> Lifecycle<'a> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn method_no_omit_lifecycle(&'a self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn method(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dep_life` is never used
[INFO] [stdout]   --> src/lifecycle.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `difficult` is never used
[INFO] [stdout]   --> src/lifecycle.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/closure.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_fn_pointer` is never used
[INFO] [stdout]   --> src/closure.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn test_fn_pointer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/closure.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct  Cache<T>
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/closure.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | / impl<T> Cache<T>
[INFO] [stdout] 32 | | where
[INFO] [stdout] 33 | |     T: Fn(i32) -> i32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] 34 |   {
[INFO] [stdout] 35 |       fn new(method: T) -> Cache<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |       fn value(&mut self, arg: i32) -> i32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_once` is never used
[INFO] [stdout]   --> src/closure.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn add_once(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_more` is never used
[INFO] [stdout]   --> src/closure.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn do_more(f: fn(i32) -> i32, arg: i32) -> i32 { // fn 表示函数指针类型
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_twice` is never used
[INFO] [stdout]   --> src/closure.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> src/closure.rs:70:6
[INFO] [stdout]    |
[INFO] [stdout] 70 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure` is never used
[INFO] [stdout]   --> src/closure.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn return_closure() -> impl Fn(i32) -> i32 { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure_pro` is never used
[INFO] [stdout]   --> src/closure.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn return_closure_pro(a: i32) -> Box<dyn Fn(i32) -> i32> { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/closure.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/main.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     st2 + &st3;
[INFO] [stdout]    |     ^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let _ = st2 + &st3;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 44 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "9c2133318f26c73cef4fddb680ac2cdd1980da9568fc4d5cf8fae89c69e315a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c2133318f26c73cef4fddb680ac2cdd1980da9568fc4d5cf8fae89c69e315a7", kill_on_drop: false }`
[INFO] [stdout] 9c2133318f26c73cef4fddb680ac2cdd1980da9568fc4d5cf8fae89c69e315a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2c6787fc5e1e9684aa191cf1f03aab55448b1e794513801481235079cec9dce
[INFO] running `Command { std: "docker" "start" "-a" "e2c6787fc5e1e9684aa191cf1f03aab55448b1e794513801481235079cec9dce", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Attribute`, `parse_macro_input`
[INFO] [stdout]  --> macro_define_crate/src/lib.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use syn::{parse_macro_input, Attribute};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `b` should have an upper camel case name
[INFO] [stdout]    --> src/main.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 |     b(i32),
[INFO] [stdout]     |     ^ help: convert the identifier to upper camel case: `B`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:47:34
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:43:27
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:52:56
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |                                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:56:46
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/mytrait.rs:56:55
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:14:28
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lifecycle.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:33:53
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/lifecycle.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/closure.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut x = add(5,7);
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/closure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     x = bo(5,7);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_statues`
[INFO] [stdout]   --> src/closure.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let list_of_statues: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statues`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]    --> src/main.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let d = demod::Demo {x:2};
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut st2 = "字符串字面值".to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]    --> src/main.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 122 | struct Point<T, U> {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] 123 |     x: T,
[INFO] [stdout] 124 |     y: U
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `y` is never used
[INFO] [stdout]    --> src/main.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T, U> Point<T, U> {// 针对类型T U实现方法
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |     fn y(&self) -> &U {
[INFO] [stdout]     |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/main.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 142 | impl<T: Display + PartialOrd, U> Point<T, U> {
[INFO] [stdout]     | -------------------------------------------- method in this implementation
[INFO] [stdout] 143 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MyEnum` is never used
[INFO] [stdout]    --> src/main.rs:157:6
[INFO] [stdout]     |
[INFO] [stdout] 157 | enum MyEnum<T> {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_open_file` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn test_open_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/mytrait.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn notify(item: impl Summary, item2: impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn notify_trait_bounds<T: Summary>(item: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait` is never used
[INFO] [stdout]   --> src/mytrait.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_return` is never used
[INFO] [stdout]   --> src/mytrait.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds_where` is never used
[INFO] [stdout]   --> src/mytrait.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lifecycle` is never constructed
[INFO] [stdout]  --> src/lifecycle.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Lifecycle<'a> {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/lifecycle.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `life`, `method_no_omit_lifecycle`, and `method` are never used
[INFO] [stdout]   --> src/lifecycle.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a> Lifecycle<'a> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn method_no_omit_lifecycle(&'a self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn method(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dep_life` is never used
[INFO] [stdout]   --> src/lifecycle.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `difficult` is never used
[INFO] [stdout]   --> src/lifecycle.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/closure.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_fn_pointer` is never used
[INFO] [stdout]   --> src/closure.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn test_fn_pointer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/closure.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct  Cache<T>
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/closure.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | / impl<T> Cache<T>
[INFO] [stdout] 32 | | where
[INFO] [stdout] 33 | |     T: Fn(i32) -> i32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] 34 |   {
[INFO] [stdout] 35 |       fn new(method: T) -> Cache<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |       fn value(&mut self, arg: i32) -> i32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_once` is never used
[INFO] [stdout]   --> src/closure.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn add_once(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_more` is never used
[INFO] [stdout]   --> src/closure.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn do_more(f: fn(i32) -> i32, arg: i32) -> i32 { // fn 表示函数指针类型
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_twice` is never used
[INFO] [stdout]   --> src/closure.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> src/closure.rs:70:6
[INFO] [stdout]    |
[INFO] [stdout] 70 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure` is never used
[INFO] [stdout]   --> src/closure.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn return_closure() -> impl Fn(i32) -> i32 { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure_pro` is never used
[INFO] [stdout]   --> src/closure.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn return_closure_pro(a: i32) -> Box<dyn Fn(i32) -> i32> { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/closure.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/main.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     st2 + &st3;
[INFO] [stdout]    |     ^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let _ = st2 + &st3;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 44 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "e2c6787fc5e1e9684aa191cf1f03aab55448b1e794513801481235079cec9dce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2c6787fc5e1e9684aa191cf1f03aab55448b1e794513801481235079cec9dce", kill_on_drop: false }`
[INFO] [stdout] e2c6787fc5e1e9684aa191cf1f03aab55448b1e794513801481235079cec9dce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c74fb316f41713abf0f1f81c96b103edd892070cdd3d8bbddd5565e88b12f1e1
[INFO] running `Command { std: "docker" "start" "-a" "c74fb316f41713abf0f1f81c96b103edd892070cdd3d8bbddd5565e88b12f1e1", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Attribute`, `parse_macro_input`
[INFO] [stderr]  --> macro_define_crate/src/lib.rs:2:11
[INFO] [stderr]   |
[INFO] [stderr] 2 | use syn::{parse_macro_input, Attribute};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `macro_define_crate` (lib) generated 1 warning (run `cargo fix --lib -p macro_define_crate` to apply 1 suggestion)
[INFO] [stderr] warning: variant `b` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:159:5
[INFO] [stderr]     |
[INFO] [stderr] 159 |     b(i32),
[INFO] [stderr]     |     ^ help: convert the identifier to upper camel case: `B`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:47:34
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stderr]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:43:27
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stderr]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:52:56
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stderr]    |                                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:56:46
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stderr]    |                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/mytrait.rs:56:55
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stderr]    |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/lifecycle.rs:14:28
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg`
[INFO] [stderr]   --> src/lifecycle.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/lifecycle.rs:33:53
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stderr]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/lifecycle.rs:37:45
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stderr]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `x` is assigned to, but never used
[INFO] [stderr]   --> src/closure.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut x = add(5,7);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/closure.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     x = bo(5,7);
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list_of_statues`
[INFO] [stderr]   --> src/closure.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let list_of_statues: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statues`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let d = demod::Demo {x:2};
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut st2 = "字符串字面值".to_string();
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `y` is never read
[INFO] [stderr]    --> src/main.rs:124:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | struct Point<T, U> {
[INFO] [stderr]     |        ----- field in this struct
[INFO] [stderr] 123 |     x: T,
[INFO] [stderr] 124 |     y: U
[INFO] [stderr]     |     ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `y` is never used
[INFO] [stderr]    --> src/main.rs:131:8
[INFO] [stderr]     |
[INFO] [stderr] 127 | impl<T, U> Point<T, U> {// 针对类型T U实现方法
[INFO] [stderr]     | ---------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 131 |     fn y(&self) -> &U {
[INFO] [stderr]     |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]    --> src/main.rs:143:8
[INFO] [stderr]     |
[INFO] [stderr] 142 | impl<T: Display + PartialOrd, U> Point<T, U> {
[INFO] [stderr]     | -------------------------------------------- method in this implementation
[INFO] [stderr] 143 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `MyEnum` is never used
[INFO] [stderr]    --> src/main.rs:157:6
[INFO] [stderr]     |
[INFO] [stderr] 157 | enum MyEnum<T> {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_open_file` is never used
[INFO] [stderr]    --> src/main.rs:166:4
[INFO] [stderr]     |
[INFO] [stderr] 166 | fn test_open_file() -> Result<String, io::Error> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify` is never used
[INFO] [stderr]   --> src/mytrait.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn notify(item: impl Summary, item2: impl Summary) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_trait_bounds` is never used
[INFO] [stderr]   --> src/mytrait.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn notify_trait_bounds<T: Summary>(item: T, item2: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait` is never used
[INFO] [stderr]   --> src/mytrait.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait_return` is never used
[INFO] [stderr]   --> src/mytrait.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait_bounds` is never used
[INFO] [stderr]   --> src/mytrait.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait_bounds_where` is never used
[INFO] [stderr]   --> src/mytrait.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Lifecycle` is never constructed
[INFO] [stderr]  --> src/lifecycle.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Lifecycle<'a> {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest` is never used
[INFO] [stderr]   --> src/lifecycle.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `life`, `method_no_omit_lifecycle`, and `method` are never used
[INFO] [stderr]   --> src/lifecycle.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl<'a> Lifecycle<'a> {
[INFO] [stderr]    | ---------------------- associated items in this implementation
[INFO] [stderr] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 23 |     fn method_no_omit_lifecycle(&'a self) -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 27 |     fn method(&self) -> i32 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_dep_life` is never used
[INFO] [stderr]   --> src/lifecycle.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `difficult` is never used
[INFO] [stderr]   --> src/lifecycle.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_closure` is never used
[INFO] [stderr]  --> src/closure.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn test_closure() {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]  --> src/closure.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_fn_pointer` is never used
[INFO] [stderr]   --> src/closure.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn test_fn_pointer() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cache` is never constructed
[INFO] [stderr]   --> src/closure.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 | struct  Cache<T>
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `value` are never used
[INFO] [stderr]   --> src/closure.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | / impl<T> Cache<T>
[INFO] [stderr] 32 | | where
[INFO] [stderr] 33 | |     T: Fn(i32) -> i32,
[INFO] [stderr]    | |______________________- associated items in this implementation
[INFO] [stderr] 34 |   {
[INFO] [stderr] 35 |       fn new(method: T) -> Cache<T> {
[INFO] [stderr]    |          ^^^
[INFO] [stderr] ...
[INFO] [stderr] 42 |       fn value(&mut self, arg: i32) -> i32 {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_once` is never used
[INFO] [stderr]   --> src/closure.rs:55:4
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn add_once(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `do_more` is never used
[INFO] [stderr]   --> src/closure.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn do_more(f: fn(i32) -> i32, arg: i32) -> i32 { // fn 表示函数指针类型
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `do_twice` is never used
[INFO] [stderr]   --> src/closure.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Status` is never used
[INFO] [stderr]   --> src/closure.rs:70:6
[INFO] [stderr]    |
[INFO] [stderr] 70 | enum Status {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_closure` is never used
[INFO] [stderr]   --> src/closure.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn return_closure() -> impl Fn(i32) -> i32 { // 返回闭包需要闭包特征
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_closure_pro` is never used
[INFO] [stderr]   --> src/closure.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn return_closure_pro(a: i32) -> Box<dyn Fn(i32) -> i32> { // 返回闭包需要闭包特征
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test` is never used
[INFO] [stderr]   --> src/closure.rs:87:4
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn test() {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/main.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     st2 + &st3;
[INFO] [stderr]    |     ^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let _ = st2 + &st3;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `learn` (bin "learn" test) generated 44 warnings (run `cargo fix --bin "learn" --tests` to apply 12 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn-7b6badb191048cbc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/crateroot.rs (/opt/rustwide/target/debug/deps/crateroot-897db6cd2c95a25f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learn-93ad909b3f558e4a)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::demotest::inner::some_expensive_method ... ignored, too expensive
[INFO] [stdout] test tests::demotest::inner::it_doesnot_work ... ok
[INFO] [stdout] test tests::demotest::it_works ... ok
[INFO] [stdout] test tests::demotest::test_result ... ok
[INFO] [stdout] test tests::demotest::inner::it_doesnot_work_customize ... FAILED
[INFO] [stdout] test tests::demotest::test_should_panic - should panic ... ok
[INFO] [stdout] test tests::demotest::test_should_panic_expected - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::demotest::inner::it_doesnot_work_customize stdout ----
[INFO] [stdout] thread 'tests::demotest::inner::it_doesnot_work_customize' panicked at src/tests/demotest.rs:34:9:
[INFO] [stdout] This is custom error info
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x561e3d6290cc - std::backtrace_rs::backtrace::libunwind::trace::ha637c64ce894333a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x561e3d6290cc - std::backtrace_rs::backtrace::trace_unsynchronized::h47f62dea28e0c88d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x561e3d6290cc - std::sys_common::backtrace::_print_fmt::h9eef0abe20ede486
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x561e3d6290cc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hed7f999df88cc644
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x561e3d652c10 - core::fmt::rt::Argument::fmt::h1539a9308b8d058d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x561e3d652c10 - core::fmt::write::h3a39390d8560d9c9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x561e3d626a7f - std::io::Write::write_fmt::h040b369f3a0f9cbc
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:1762:15
[INFO] [stdout]    7:     0x561e3d628eb4 - std::sys_common::backtrace::_print::h894006fb5c6f3d45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x561e3d628eb4 - std::sys_common::backtrace::print::h23a2d212c6fff936
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x561e3d62ab77 - std::panicking::default_hook::{{closure}}::h8a1d2ee00185001a
[INFO] [stdout]   10:     0x561e3d62a863 - std::panicking::default_hook::h6038f2eba384e475
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x561e3d5fb227 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0ad024c9bdc6d768
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   12:     0x561e3d5fb227 - test::test_main::{{closure}}::h7500b54257359db6
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x561e3d62b188 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1f8f335eaa9cfaee
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   14:     0x561e3d62b188 - std::panicking::rust_panic_with_hook::h2b5517d590cab22e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x561e3d62aea9 - std::panicking::begin_panic_handler::{{closure}}::h233112c06e0ef43e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:649:13
[INFO] [stdout]   16:     0x561e3d629596 - std::sys_common::backtrace::__rust_end_short_backtrace::h6e893f24d7ebbff8
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stdout]   17:     0x561e3d62ac42 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x561e3d5c4ce5 - core::panicking::panic_fmt::hbf0e066aabfa482c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x561e3d5c7595 - learn::tests::demotest::inner::it_doesnot_work_customize::h4b6d086ea7d9509f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:34:9
[INFO] [stdout]   20:     0x561e3d5c7507 - learn::tests::demotest::inner::it_doesnot_work_customize::{{closure}}::hb0352831505cbda1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:33:35
[INFO] [stdout]   21:     0x561e3d5c59e6 - core::ops::function::FnOnce::call_once::h631d268490bfbbc4
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x561e3d60087f - core::ops::function::FnOnce::call_once::h2b5d431d5046312d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x561e3d60087f - test::__rust_begin_short_backtrace::h7714669af176e207
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:628:18
[INFO] [stdout]   24:     0x561e3d5ff895 - test::run_test_in_process::{{closure}}::h85218797dcbcec12
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:60
[INFO] [stdout]   25:     0x561e3d5ff895 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h76c106ea31c14d7b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x561e3d5ff895 - std::panicking::try::do_call::h3bd5d0f6620ee946
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   27:     0x561e3d5ff895 - std::panicking::try::h232e535e4744fe31
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   28:     0x561e3d5ff895 - std::panic::catch_unwind::h3ce3bd6ca8dbac68
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   29:     0x561e3d5ff895 - test::run_test_in_process::hc97b257c9621286a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:27
[INFO] [stdout]   30:     0x561e3d5ff895 - test::run_test::{{closure}}::h2aa798823a438d38
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:574:43
[INFO] [stdout]   31:     0x561e3d5c7b56 - test::run_test::{{closure}}::h87d231c78fb59832
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:602:41
[INFO] [stdout]   32:     0x561e3d5c7b56 - std::sys_common::backtrace::__rust_begin_short_backtrace::he6df152596625789
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:154:18
[INFO] [stdout]   33:     0x561e3d5ccc07 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha94be15d1e0acf36
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   34:     0x561e3d5ccc07 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9dc6bd6372f16606
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x561e3d5ccc07 - std::panicking::try::do_call::h9057517f80303cd4
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   36:     0x561e3d5ccc07 - std::panicking::try::he3a30b11ee45340c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   37:     0x561e3d5ccc07 - std::panic::catch_unwind::h410458cfd3528b8b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   38:     0x561e3d5ccc07 - std::thread::Builder::spawn_unchecked_::{{closure}}::h72ac3bdb567b737b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   39:     0x561e3d5ccc07 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h38f34da3654a8344
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x561e3d62fc15 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc7eafaff61e32df9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   41:     0x561e3d62fc15 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6ba4a5de48dd2304
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   42:     0x561e3d62fc15 - std::sys::unix::thread::Thread::new::thread_start::he469335aef763e45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7f0d0a2eaac3 - <unknown>
[INFO] [stdout]   44:     0x7f0d0a37bbf4 - __clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::demotest::inner::it_doesnot_work_customize
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin learn`
[INFO] running `Command { std: "docker" "inspect" "c74fb316f41713abf0f1f81c96b103edd892070cdd3d8bbddd5565e88b12f1e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c74fb316f41713abf0f1f81c96b103edd892070cdd3d8bbddd5565e88b12f1e1", kill_on_drop: false }`
[INFO] [stdout] c74fb316f41713abf0f1f81c96b103edd892070cdd3d8bbddd5565e88b12f1e1
[INFO] testing breakinferno/learn-rust-demo against beta-2023-12-22 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreakinferno%2Flearn-rust-demo" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/breakinferno/learn-rust-demo on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/breakinferno/learn-rust-demo
[INFO] finished tweaking git repo https://github.com/breakinferno/learn-rust-demo
[INFO] tweaked toml for git repo https://github.com/breakinferno/learn-rust-demo written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/breakinferno/learn-rust-demo 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" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3386a51894f9f703a21f536735fe5fd2e2df8b211d771227c7424e3e3c3e66a0
[INFO] running `Command { std: "docker" "start" "-a" "3386a51894f9f703a21f536735fe5fd2e2df8b211d771227c7424e3e3c3e66a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3386a51894f9f703a21f536735fe5fd2e2df8b211d771227c7424e3e3c3e66a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3386a51894f9f703a21f536735fe5fd2e2df8b211d771227c7424e3e3c3e66a0", kill_on_drop: false }`
[INFO] [stdout] 3386a51894f9f703a21f536735fe5fd2e2df8b211d771227c7424e3e3c3e66a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76965e1baaaaae9bf45f5aabd439209f304dabb22619ddddee2e916e887017b6
[INFO] running `Command { std: "docker" "start" "-a" "76965e1baaaaae9bf45f5aabd439209f304dabb22619ddddee2e916e887017b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]    Compiling macro_define_crate v0.1.0 (/opt/rustwide/workdir/macro_define_crate)
[INFO] [stdout] warning: unused imports: `Attribute`, `parse_macro_input`
[INFO] [stdout]  --> macro_define_crate/src/lib.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use syn::{parse_macro_input, Attribute};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `b` should have an upper camel case name
[INFO] [stdout]    --> src/main.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 |     b(i32),
[INFO] [stdout]     |     ^ help: convert the identifier to upper camel case: `B`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:47:34
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:43:27
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:52:56
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |                                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:56:46
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/mytrait.rs:56:55
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:14:28
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lifecycle.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:33:53
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/lifecycle.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/closure.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut x = add(5,7);
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/closure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     x = bo(5,7);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_statues`
[INFO] [stdout]   --> src/closure.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let list_of_statues: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statues`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]    --> src/main.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let d = demod::Demo {x:2};
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut st2 = "字符串字面值".to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]    --> src/main.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 122 | struct Point<T, U> {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] 123 |     x: T,
[INFO] [stdout] 124 |     y: U
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `y` is never used
[INFO] [stdout]    --> src/main.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T, U> Point<T, U> {// 针对类型T U实现方法
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |     fn y(&self) -> &U {
[INFO] [stdout]     |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/main.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 142 | impl<T: Display + PartialOrd, U> Point<T, U> {
[INFO] [stdout]     | -------------------------------------------- method in this implementation
[INFO] [stdout] 143 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MyEnum` is never used
[INFO] [stdout]    --> src/main.rs:157:6
[INFO] [stdout]     |
[INFO] [stdout] 157 | enum MyEnum<T> {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_open_file` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn test_open_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/mytrait.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn notify(item: impl Summary, item2: impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn notify_trait_bounds<T: Summary>(item: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait` is never used
[INFO] [stdout]   --> src/mytrait.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_return` is never used
[INFO] [stdout]   --> src/mytrait.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds_where` is never used
[INFO] [stdout]   --> src/mytrait.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lifecycle` is never constructed
[INFO] [stdout]  --> src/lifecycle.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Lifecycle<'a> {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/lifecycle.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `life`, `method_no_omit_lifecycle`, and `method` are never used
[INFO] [stdout]   --> src/lifecycle.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a> Lifecycle<'a> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn method_no_omit_lifecycle(&'a self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn method(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dep_life` is never used
[INFO] [stdout]   --> src/lifecycle.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `difficult` is never used
[INFO] [stdout]   --> src/lifecycle.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/closure.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_fn_pointer` is never used
[INFO] [stdout]   --> src/closure.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn test_fn_pointer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/closure.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct  Cache<T>
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/closure.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | / impl<T> Cache<T>
[INFO] [stdout] 32 | | where
[INFO] [stdout] 33 | |     T: Fn(i32) -> i32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] 34 |   {
[INFO] [stdout] 35 |       fn new(method: T) -> Cache<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |       fn value(&mut self, arg: i32) -> i32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_once` is never used
[INFO] [stdout]   --> src/closure.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn add_once(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_more` is never used
[INFO] [stdout]   --> src/closure.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn do_more(f: fn(i32) -> i32, arg: i32) -> i32 { // fn 表示函数指针类型
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_twice` is never used
[INFO] [stdout]   --> src/closure.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> src/closure.rs:70:6
[INFO] [stdout]    |
[INFO] [stdout] 70 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure` is never used
[INFO] [stdout]   --> src/closure.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn return_closure() -> impl Fn(i32) -> i32 { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure_pro` is never used
[INFO] [stdout]   --> src/closure.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn return_closure_pro(a: i32) -> Box<dyn Fn(i32) -> i32> { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/closure.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/main.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     st2 + &st3;
[INFO] [stdout]    |     ^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let _ = st2 + &st3;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 44 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "76965e1baaaaae9bf45f5aabd439209f304dabb22619ddddee2e916e887017b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76965e1baaaaae9bf45f5aabd439209f304dabb22619ddddee2e916e887017b6", kill_on_drop: false }`
[INFO] [stdout] 76965e1baaaaae9bf45f5aabd439209f304dabb22619ddddee2e916e887017b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38d15ba01ea4d464e0202f54c211a77881c92bbd6b2c049dea57edf065cb2650
[INFO] running `Command { std: "docker" "start" "-a" "38d15ba01ea4d464e0202f54c211a77881c92bbd6b2c049dea57edf065cb2650", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Attribute`, `parse_macro_input`
[INFO] [stdout]  --> macro_define_crate/src/lib.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use syn::{parse_macro_input, Attribute};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `b` should have an upper camel case name
[INFO] [stdout]    --> src/main.rs:159:5
[INFO] [stdout]     |
[INFO] [stdout] 159 |     b(i32),
[INFO] [stdout]     |     ^ help: convert the identifier to upper camel case: `B`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:47:34
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:43:27
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:52:56
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |                                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mytrait.rs:56:46
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/mytrait.rs:56:55
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:14:28
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> src/lifecycle.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lifecycle.rs:33:53
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/lifecycle.rs:37:45
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/closure.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut x = add(5,7);
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/closure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     x = bo(5,7);
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_statues`
[INFO] [stdout]   --> src/closure.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let list_of_statues: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statues`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]    --> src/main.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let d = demod::Demo {x:2};
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut st2 = "字符串字面值".to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]    --> src/main.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 122 | struct Point<T, U> {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] 123 |     x: T,
[INFO] [stdout] 124 |     y: U
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `y` is never used
[INFO] [stdout]    --> src/main.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T, U> Point<T, U> {// 针对类型T U实现方法
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |     fn y(&self) -> &U {
[INFO] [stdout]     |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/main.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 142 | impl<T: Display + PartialOrd, U> Point<T, U> {
[INFO] [stdout]     | -------------------------------------------- method in this implementation
[INFO] [stdout] 143 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MyEnum` is never used
[INFO] [stdout]    --> src/main.rs:157:6
[INFO] [stdout]     |
[INFO] [stdout] 157 | enum MyEnum<T> {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_open_file` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn test_open_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/mytrait.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn notify(item: impl Summary, item2: impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn notify_trait_bounds<T: Summary>(item: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait` is never used
[INFO] [stdout]   --> src/mytrait.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_return` is never used
[INFO] [stdout]   --> src/mytrait.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds` is never used
[INFO] [stdout]   --> src/mytrait.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multi_trait_bounds_where` is never used
[INFO] [stdout]   --> src/mytrait.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lifecycle` is never constructed
[INFO] [stdout]  --> src/lifecycle.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Lifecycle<'a> {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/lifecycle.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `life`, `method_no_omit_lifecycle`, and `method` are never used
[INFO] [stdout]   --> src/lifecycle.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a> Lifecycle<'a> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn method_no_omit_lifecycle(&'a self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn method(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dep_life` is never used
[INFO] [stdout]   --> src/lifecycle.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `difficult` is never used
[INFO] [stdout]   --> src/lifecycle.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/closure.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_fn_pointer` is never used
[INFO] [stdout]   --> src/closure.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn test_fn_pointer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/closure.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct  Cache<T>
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/closure.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | / impl<T> Cache<T>
[INFO] [stdout] 32 | | where
[INFO] [stdout] 33 | |     T: Fn(i32) -> i32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] 34 |   {
[INFO] [stdout] 35 |       fn new(method: T) -> Cache<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |       fn value(&mut self, arg: i32) -> i32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_once` is never used
[INFO] [stdout]   --> src/closure.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn add_once(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_more` is never used
[INFO] [stdout]   --> src/closure.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn do_more(f: fn(i32) -> i32, arg: i32) -> i32 { // fn 表示函数指针类型
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_twice` is never used
[INFO] [stdout]   --> src/closure.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> src/closure.rs:70:6
[INFO] [stdout]    |
[INFO] [stdout] 70 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure` is never used
[INFO] [stdout]   --> src/closure.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn return_closure() -> impl Fn(i32) -> i32 { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_closure_pro` is never used
[INFO] [stdout]   --> src/closure.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn return_closure_pro(a: i32) -> Box<dyn Fn(i32) -> i32> { // 返回闭包需要闭包特征
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/closure.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/main.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     st2 + &st3;
[INFO] [stdout]    |     ^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let _ = st2 + &st3;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 44 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "38d15ba01ea4d464e0202f54c211a77881c92bbd6b2c049dea57edf065cb2650", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38d15ba01ea4d464e0202f54c211a77881c92bbd6b2c049dea57edf065cb2650", kill_on_drop: false }`
[INFO] [stdout] 38d15ba01ea4d464e0202f54c211a77881c92bbd6b2c049dea57edf065cb2650
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c36655074cd9e0b1d5170e670cc7d124ad22c5744fbd7d9b61679b55a24b9ac6
[INFO] running `Command { std: "docker" "start" "-a" "c36655074cd9e0b1d5170e670cc7d124ad22c5744fbd7d9b61679b55a24b9ac6", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Attribute`, `parse_macro_input`
[INFO] [stderr]  --> macro_define_crate/src/lib.rs:2:11
[INFO] [stderr]   |
[INFO] [stderr] 2 | use syn::{parse_macro_input, Attribute};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `macro_define_crate` (lib) generated 1 warning (run `cargo fix --lib -p macro_define_crate` to apply 1 suggestion)
[INFO] [stderr] warning: variant `b` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:159:5
[INFO] [stderr]     |
[INFO] [stderr] 159 |     b(i32),
[INFO] [stderr]     |     ^ help: convert the identifier to upper camel case: `B`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:47:34
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stderr]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:43:27
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stderr]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:52:56
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stderr]    |                                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mytrait.rs:56:46
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stderr]    |                                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/mytrait.rs:56:55
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stderr]    |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/lifecycle.rs:14:28
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg`
[INFO] [stderr]   --> src/lifecycle.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/lifecycle.rs:33:53
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stderr]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/lifecycle.rs:37:45
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stderr]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `x` is assigned to, but never used
[INFO] [stderr]   --> src/closure.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut x = add(5,7);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/closure.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     x = bo(5,7);
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list_of_statues`
[INFO] [stderr]   --> src/closure.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let list_of_statues: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statues`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let d = demod::Demo {x:2};
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut st2 = "字符串字面值".to_string();
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `y` is never read
[INFO] [stderr]    --> src/main.rs:124:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | struct Point<T, U> {
[INFO] [stderr]     |        ----- field in this struct
[INFO] [stderr] 123 |     x: T,
[INFO] [stderr] 124 |     y: U
[INFO] [stderr]     |     ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `y` is never used
[INFO] [stderr]    --> src/main.rs:131:8
[INFO] [stderr]     |
[INFO] [stderr] 127 | impl<T, U> Point<T, U> {// 针对类型T U实现方法
[INFO] [stderr]     | ---------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 131 |     fn y(&self) -> &U {
[INFO] [stderr]     |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]    --> src/main.rs:143:8
[INFO] [stderr]     |
[INFO] [stderr] 142 | impl<T: Display + PartialOrd, U> Point<T, U> {
[INFO] [stderr]     | -------------------------------------------- method in this implementation
[INFO] [stderr] 143 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `MyEnum` is never used
[INFO] [stderr]    --> src/main.rs:157:6
[INFO] [stderr]     |
[INFO] [stderr] 157 | enum MyEnum<T> {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_open_file` is never used
[INFO] [stderr]    --> src/main.rs:166:4
[INFO] [stderr]     |
[INFO] [stderr] 166 | fn test_open_file() -> Result<String, io::Error> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify` is never used
[INFO] [stderr]   --> src/mytrait.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn notify(item: impl Summary, item2: impl Summary) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_trait_bounds` is never used
[INFO] [stderr]   --> src/mytrait.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn notify_trait_bounds<T: Summary>(item: T, item2: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait` is never used
[INFO] [stderr]   --> src/mytrait.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn notify_multi_trait(item: impl Summary + Display) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait_return` is never used
[INFO] [stderr]   --> src/mytrait.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn notify_multi_trait_return(item: impl Summary + Display) -> impl Summary {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait_bounds` is never used
[INFO] [stderr]   --> src/mytrait.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub fn notify_multi_trait_bounds<T: Summary + Display>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multi_trait_bounds_where` is never used
[INFO] [stderr]   --> src/mytrait.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn notify_multi_trait_bounds_where<T, U>(item: T, key: U) 
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Lifecycle` is never constructed
[INFO] [stderr]  --> src/lifecycle.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Lifecycle<'a> {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest` is never used
[INFO] [stderr]   --> src/lifecycle.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn largest<'a>(a: &'a i32, b: &'a i32) -> &'a i32 { // 声明了一个声明周期，跟泛型一样，泛型式声明了一个类型。
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `life`, `method_no_omit_lifecycle`, and `method` are never used
[INFO] [stderr]   --> src/lifecycle.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl<'a> Lifecycle<'a> {
[INFO] [stderr]    | ---------------------- associated items in this implementation
[INFO] [stderr] 19 |     fn life(arg: &'a str) -> &'a str {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 23 |     fn method_no_omit_lifecycle(&'a self) -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 27 |     fn method(&self) -> i32 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_dep_life` is never used
[INFO] [stderr]   --> src/lifecycle.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn test_dep_life<'a: 'b, 'b: 'c, 'c>(a: &'a String, b: &'b String) -> &'c String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `difficult` is never used
[INFO] [stderr]   --> src/lifecycle.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn difficult<'a, T>(x: &'a str, y: &'a str, z: T) -> &'a str
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_closure` is never used
[INFO] [stderr]  --> src/closure.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn test_closure() {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]  --> src/closure.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_fn_pointer` is never used
[INFO] [stderr]   --> src/closure.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn test_fn_pointer() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cache` is never constructed
[INFO] [stderr]   --> src/closure.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 | struct  Cache<T>
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `value` are never used
[INFO] [stderr]   --> src/closure.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | / impl<T> Cache<T>
[INFO] [stderr] 32 | | where
[INFO] [stderr] 33 | |     T: Fn(i32) -> i32,
[INFO] [stderr]    | |______________________- associated items in this implementation
[INFO] [stderr] 34 |   {
[INFO] [stderr] 35 |       fn new(method: T) -> Cache<T> {
[INFO] [stderr]    |          ^^^
[INFO] [stderr] ...
[INFO] [stderr] 42 |       fn value(&mut self, arg: i32) -> i32 {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_once` is never used
[INFO] [stderr]   --> src/closure.rs:55:4
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn add_once(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `do_more` is never used
[INFO] [stderr]   --> src/closure.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn do_more(f: fn(i32) -> i32, arg: i32) -> i32 { // fn 表示函数指针类型
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `do_twice` is never used
[INFO] [stderr]   --> src/closure.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Status` is never used
[INFO] [stderr]   --> src/closure.rs:70:6
[INFO] [stderr]    |
[INFO] [stderr] 70 | enum Status {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_closure` is never used
[INFO] [stderr]   --> src/closure.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn return_closure() -> impl Fn(i32) -> i32 { // 返回闭包需要闭包特征
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_closure_pro` is never used
[INFO] [stderr]   --> src/closure.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn return_closure_pro(a: i32) -> Box<dyn Fn(i32) -> i32> { // 返回闭包需要闭包特征
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test` is never used
[INFO] [stderr]   --> src/closure.rs:87:4
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn test() {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/main.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     st2 + &st3;
[INFO] [stderr]    |     ^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let _ = st2 + &st3;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `learn` (bin "learn" test) generated 44 warnings (run `cargo fix --bin "learn" --tests` to apply 12 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn-831855b3e85b607a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/crateroot.rs (/opt/rustwide/target/debug/deps/crateroot-a4d138358d4c6be2)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learn-f5a6000eb80b19b3)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::demotest::inner::some_expensive_method ... ignored, too expensive
[INFO] [stdout] test tests::demotest::inner::it_doesnot_work ... ok
[INFO] [stdout] test tests::demotest::it_works ... ok
[INFO] [stdout] test tests::demotest::test_result ... ok
[INFO] [stdout] test tests::demotest::inner::it_doesnot_work_customize ... FAILED
[INFO] [stdout] test tests::demotest::test_should_panic - should panic ... ok
[INFO] [stdout] test tests::demotest::test_should_panic_expected - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::demotest::inner::it_doesnot_work_customize stdout ----
[INFO] [stdout] thread 'tests::demotest::inner::it_doesnot_work_customize' panicked at src/tests/demotest.rs:34:9:
[INFO] [stdout] This is custom error info
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x562361247866 - std::backtrace_rs::backtrace::libunwind::trace::h261606ad26a499c1
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x562361247866 - std::backtrace_rs::backtrace::trace_unsynchronized::hd183f0625477fb28
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x562361247866 - std::sys_common::backtrace::_print_fmt::hd7f8fef21b4eda67
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x562361247866 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h623d9b51f2f453f1
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5623612706b0 - core::fmt::rt::Argument::fmt::h9f417ac76a86f368
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x5623612706b0 - core::fmt::write::hc9b6faf4ac2aeff7
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x5623612452cf - std::io::Write::write_fmt::he04625a3a989fec3
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/io/mod.rs:1810:15
[INFO] [stdout]    7:     0x562361247644 - std::sys_common::backtrace::_print::hd5d66399c7df88a2
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x562361247644 - std::sys_common::backtrace::print::he81ed2da642d37e5
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5623612493b7 - std::panicking::default_hook::{{closure}}::h85773f4fa117163d
[INFO] [stdout]   10:     0x56236124909d - std::panicking::default_hook::h6a1694a91d09b278
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x562361219227 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h616ac37fa3cd6c8f
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   12:     0x562361219227 - test::test_main::{{closure}}::h00d84697cefdcbb6
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x5623612499d6 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcb3fe3b9bb537ba8
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   14:     0x5623612499d6 - std::panicking::rust_panic_with_hook::h0a7ad96e90f7145b
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x5623612496e9 - std::panicking::begin_panic_handler::{{closure}}::h7919090525c6485e
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:649:13
[INFO] [stdout]   16:     0x562361247d66 - std::sys_common::backtrace::__rust_end_short_backtrace::hf3289479464f7dfe
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x562361249480 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x5623611e1cc5 - core::panicking::panic_fmt::hcc9f77c5c132af55
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x5623611e45f3 - learn::tests::demotest::inner::it_doesnot_work_customize::h70bfb27d5f0171fe
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:34:9
[INFO] [stdout]   20:     0x5623611e4567 - learn::tests::demotest::inner::it_doesnot_work_customize::{{closure}}::h90752b99de4b62ae
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:33:35
[INFO] [stdout]   21:     0x5623611e2b56 - core::ops::function::FnOnce::call_once::he853e53cb0bc1924
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x56236121eaff - core::ops::function::FnOnce::call_once::hd64d26f405258157
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x56236121eaff - test::__rust_begin_short_backtrace::he21b0b7a6d731bf9
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:627:18
[INFO] [stdout]   24:     0x56236121d881 - test::run_test_in_process::{{closure}}::hf5c73986d7bdfde2
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:650:60
[INFO] [stdout]   25:     0x56236121d881 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h330011ad032aadc0
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x56236121d881 - std::panicking::try::do_call::he61b0a958b795a41
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:552:40
[INFO] [stdout]   27:     0x56236121d881 - std::panicking::try::h7309da130f906eb7
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:516:19
[INFO] [stdout]   28:     0x56236121d881 - std::panic::catch_unwind::hc5c3a06fdaf0a92a
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panic.rs:142:14
[INFO] [stdout]   29:     0x56236121d881 - test::run_test_in_process::h7e7b7c71c3324e0f
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:650:27
[INFO] [stdout]   30:     0x56236121d881 - test::run_test::{{closure}}::h1f509f28f5cf20b1
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:573:43
[INFO] [stdout]   31:     0x5623611e4bb6 - test::run_test::{{closure}}::h1754218abf443f6d
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/test/src/lib.rs:601:41
[INFO] [stdout]   32:     0x5623611e4bb6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h2ee174b9d5954948
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x5623611e9c17 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hf60bee9c1a17ef09
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   34:     0x5623611e9c17 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h33d0dddec5216160
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x5623611e9c17 - std::panicking::try::do_call::h144b3048b546f835
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:552:40
[INFO] [stdout]   36:     0x5623611e9c17 - std::panicking::try::h978244d04646189f
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:516:19
[INFO] [stdout]   37:     0x5623611e9c17 - std::panic::catch_unwind::hdf436369d188fe86
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panic.rs:142:14
[INFO] [stdout]   38:     0x5623611e9c17 - std::thread::Builder::spawn_unchecked_::{{closure}}::h87329cbdd33c79ec
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   39:     0x5623611e9c17 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h401abbe67897d450
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x56236124e485 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5d7c8f150ab9c84c
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   41:     0x56236124e485 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h570d5b005c242c15
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   42:     0x56236124e485 - std::sys::unix::thread::Thread::new::thread_start::h36b0a20c0b2361ad
[INFO] [stdout]                                at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7fec186c5ac3 - <unknown>
[INFO] [stdout]   44:     0x7fec18756bf4 - __clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::demotest::inner::it_doesnot_work_customize
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin learn`
[INFO] running `Command { std: "docker" "inspect" "c36655074cd9e0b1d5170e670cc7d124ad22c5744fbd7d9b61679b55a24b9ac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c36655074cd9e0b1d5170e670cc7d124ad22c5744fbd7d9b61679b55a24b9ac6", kill_on_drop: false }`
[INFO] [stdout] c36655074cd9e0b1d5170e670cc7d124ad22c5744fbd7d9b61679b55a24b9ac6
