[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 master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreakinferno%2Flearn-rust-demo" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/breakinferno/learn-rust-demo on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "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-3-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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1840893424d83272a813288d371c2518b42508dc7faff2318d771f520af7737
[INFO] running `Command { std: "docker" "start" "-a" "d1840893424d83272a813288d371c2518b42508dc7faff2318d771f520af7737", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1840893424d83272a813288d371c2518b42508dc7faff2318d771f520af7737", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1840893424d83272a813288d371c2518b42508dc7faff2318d771f520af7737", kill_on_drop: false }`
[INFO] [stdout] d1840893424d83272a813288d371c2518b42508dc7faff2318d771f520af7737
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d9189099d76ac7b309781ef511503c5919ba6f68e804f1e031d07967a576ed0
[INFO] running `Command { std: "docker" "start" "-a" "5d9189099d76ac7b309781ef511503c5919ba6f68e804f1e031d07967a576ed0", 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 `0` is never read
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(()),
[INFO] [stdout]    |          ~~
[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] 
[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: field `x` is never read
[INFO] [stdout]  --> src/demod/demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Demo {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     pub x: i32
[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: 48 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.21s
[INFO] running `Command { std: "docker" "inspect" "5d9189099d76ac7b309781ef511503c5919ba6f68e804f1e031d07967a576ed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d9189099d76ac7b309781ef511503c5919ba6f68e804f1e031d07967a576ed0", kill_on_drop: false }`
[INFO] [stdout] 5d9189099d76ac7b309781ef511503c5919ba6f68e804f1e031d07967a576ed0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4ae4bf772122a856b99ddc1211e6ef17bdb476baa17bf8e1d91eb88e77757d0
[INFO] running `Command { std: "docker" "start" "-a" "c4ae4bf772122a856b99ddc1211e6ef17bdb476baa17bf8e1d91eb88e77757d0", kill_on_drop: false }`
[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 `0` is never read
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(()),
[INFO] [stdout]    |          ~~
[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] 
[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: field `x` is never read
[INFO] [stdout]  --> src/demod/demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Demo {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     pub x: i32
[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: 48 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "c4ae4bf772122a856b99ddc1211e6ef17bdb476baa17bf8e1d91eb88e77757d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4ae4bf772122a856b99ddc1211e6ef17bdb476baa17bf8e1d91eb88e77757d0", kill_on_drop: false }`
[INFO] [stdout] c4ae4bf772122a856b99ddc1211e6ef17bdb476baa17bf8e1d91eb88e77757d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ac214e82c6bdbaa21d4181c820fcdc8a7583a9412cdb8ca48c3395ce8f533cc7
[INFO] running `Command { std: "docker" "start" "-a" "ac214e82c6bdbaa21d4181c820fcdc8a7583a9412cdb8ca48c3395ce8f533cc7", 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 `0` is never read
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Int(i32),
[INFO] [stderr]    |     --- ^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Int(()),
[INFO] [stderr]    |         ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:18:11
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Float(f64),
[INFO] [stderr]    |     ----- ^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Float(()),
[INFO] [stderr]    |           ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:19:10
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Text(String),
[INFO] [stderr]    |     ---- ^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Text(()),
[INFO] [stderr]    |          ~~
[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] 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: field `x` is never read
[INFO] [stderr]  --> src/demod/demo.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Demo {
[INFO] [stderr]   |            ---- field in this struct
[INFO] [stderr] 2 |     pub x: i32
[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 48 warnings (run `cargo fix --bin "learn" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn-abd824f64948f71b)
[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-eb6ed1a9adb09305)
[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-e0344554cee1d8a6)
[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:     0x5556f3ed7a85 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x5556f3ed7a85 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5556f3ed7a85 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x5556f3ed7a85 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5556f3efe2cb - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x5556f3efe2cb - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x5556f3ed52bf - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x5556f3ed785e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x5556f3ed785e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5556f3ed9289 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x5556f3ed8f4e - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x5556f3eaa15a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x5556f3eaa15a - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x5556f3ed988b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x5556f3ed988b - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x5556f3ed95cb - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x5556f3ed7f49 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x5556f3ed9337 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x5556f3e73833 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x5556f3e76695 - learn::tests::demotest::inner::it_doesnot_work_customize::h9cc65a2b2f104f0b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:34:9
[INFO] [stdout]   20:     0x5556f3e76617 - learn::tests::demotest::inner::it_doesnot_work_customize::{{closure}}::hd111f713c96055e1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:33:35
[INFO] [stdout]   21:     0x5556f3e74756 - core::ops::function::FnOnce::call_once::hba03f3647299af3d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x5556f3eaeb3b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5556f3eaeb3b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x5556f3eae241 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x5556f3eae241 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x5556f3eae241 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x5556f3eae241 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x5556f3eae241 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x5556f3eae241 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x5556f3eae241 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x5556f3e76c04 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x5556f3e76c04 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x5556f3e7b632 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x5556f3e7b632 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x5556f3e7b632 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x5556f3e7b632 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x5556f3e7b632 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x5556f3e7b632 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x5556f3e7b632 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x5556f3edda6b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x5556f3edda6b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x5556f3edda6b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7ff0629faac3 - <unknown>
[INFO] [stdout]   44:     0x7ff062a8ba04 - __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" "ac214e82c6bdbaa21d4181c820fcdc8a7583a9412cdb8ca48c3395ce8f533cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac214e82c6bdbaa21d4181c820fcdc8a7583a9412cdb8ca48c3395ce8f533cc7", kill_on_drop: false }`
[INFO] [stdout] ac214e82c6bdbaa21d4181c820fcdc8a7583a9412cdb8ca48c3395ce8f533cc7
[INFO] testing breakinferno/learn-rust-demo against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreakinferno%2Flearn-rust-demo" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/breakinferno/learn-rust-demo on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "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-3-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" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52b5404b89403db6a1cc9dae3897e25d4cf16d36ce9c6f0daf317798435d5bd6
[INFO] running `Command { std: "docker" "start" "-a" "52b5404b89403db6a1cc9dae3897e25d4cf16d36ce9c6f0daf317798435d5bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52b5404b89403db6a1cc9dae3897e25d4cf16d36ce9c6f0daf317798435d5bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52b5404b89403db6a1cc9dae3897e25d4cf16d36ce9c6f0daf317798435d5bd6", kill_on_drop: false }`
[INFO] [stdout] 52b5404b89403db6a1cc9dae3897e25d4cf16d36ce9c6f0daf317798435d5bd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44f100a4589e7c3971546ccedd7919a68d0d6c81473cd1c9bbaeca371c8d185e
[INFO] running `Command { std: "docker" "start" "-a" "44f100a4589e7c3971546ccedd7919a68d0d6c81473cd1c9bbaeca371c8d185e", 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 `0` is never read
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(()),
[INFO] [stdout]    |          ~~
[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] 
[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: field `x` is never read
[INFO] [stdout]  --> src/demod/demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Demo {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     pub x: i32
[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: 48 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.26s
[INFO] running `Command { std: "docker" "inspect" "44f100a4589e7c3971546ccedd7919a68d0d6c81473cd1c9bbaeca371c8d185e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44f100a4589e7c3971546ccedd7919a68d0d6c81473cd1c9bbaeca371c8d185e", kill_on_drop: false }`
[INFO] [stdout] 44f100a4589e7c3971546ccedd7919a68d0d6c81473cd1c9bbaeca371c8d185e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7235b30f6a477b9cc2b557523418830e4fe5fcec9a63bd30731251c4ee2cf137
[INFO] running `Command { std: "docker" "start" "-a" "7235b30f6a477b9cc2b557523418830e4fe5fcec9a63bd30731251c4ee2cf137", 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 `0` is never read
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Int(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Float(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Text(()),
[INFO] [stdout]    |          ~~
[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] 
[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: field `x` is never read
[INFO] [stdout]  --> src/demod/demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Demo {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     pub x: i32
[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: 48 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "7235b30f6a477b9cc2b557523418830e4fe5fcec9a63bd30731251c4ee2cf137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7235b30f6a477b9cc2b557523418830e4fe5fcec9a63bd30731251c4ee2cf137", kill_on_drop: false }`
[INFO] [stdout] 7235b30f6a477b9cc2b557523418830e4fe5fcec9a63bd30731251c4ee2cf137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0287e668467159131256adb45ca1731376ad211472d4e0ea56ae8f1a63de6c6a
[INFO] running `Command { std: "docker" "start" "-a" "0287e668467159131256adb45ca1731376ad211472d4e0ea56ae8f1a63de6c6a", 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 `0` is never read
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Int(i32),
[INFO] [stderr]    |     --- ^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Int(()),
[INFO] [stderr]    |         ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:18:11
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Float(f64),
[INFO] [stderr]    |     ----- ^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Float(()),
[INFO] [stderr]    |           ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:19:10
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Text(String),
[INFO] [stderr]    |     ---- ^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Text(()),
[INFO] [stderr]    |          ~~
[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] 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: field `x` is never read
[INFO] [stderr]  --> src/demod/demo.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Demo {
[INFO] [stderr]   |            ---- field in this struct
[INFO] [stderr] 2 |     pub x: i32
[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 48 warnings (run `cargo fix --bin "learn" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn-abd824f64948f71b)
[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-eb6ed1a9adb09305)
[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-e0344554cee1d8a6)
[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:     0x555e12dd5b25 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x555e12dd5b25 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x555e12dd5b25 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x555e12dd5b25 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x555e12dfc30b - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x555e12dfc30b - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x555e12dd340f - std::io::Write::write_fmt::hea6336dbf2fa00b8
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x555e12dd58fe - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x555e12dd58fe - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x555e12dd7269 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stdout]   10:     0x555e12dd6fbc - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x555e12da822f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x555e12da822f - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x555e12dd786b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x555e12dd786b - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x555e12dd75ab - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x555e12dd5fe9 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x555e12dd7317 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x555e12d71813 - core::panicking::panic_fmt::h2ba8af99174d83ea
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x555e12d74675 - learn::tests::demotest::inner::it_doesnot_work_customize::hb5e72f6fc30d3dd3
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:34:9
[INFO] [stdout]   20:     0x555e12d745f7 - learn::tests::demotest::inner::it_doesnot_work_customize::{{closure}}::h058504bb63cca670
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests/demotest.rs:33:35
[INFO] [stdout]   21:     0x555e12d725e6 - core::ops::function::FnOnce::call_once::h04674460c156d012
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x555e12dacb4b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x555e12dacb4b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x555e12dac211 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x555e12dac211 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x555e12dac211 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x555e12dac211 - std::panicking::try::hea3411d60321c4de
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x555e12dac211 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x555e12dac211 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x555e12dac211 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x555e12d74be4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x555e12d74be4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x555e12d796b2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x555e12d796b2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x555e12d796b2 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x555e12d796b2 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x555e12d796b2 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x555e12d796b2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x555e12d796b2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x555e12ddba3b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x555e12ddba3b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x555e12ddba3b - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7f9e78f32ac3 - <unknown>
[INFO] [stdout]   44:     0x7f9e78fc3a04 - __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" "0287e668467159131256adb45ca1731376ad211472d4e0ea56ae8f1a63de6c6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0287e668467159131256adb45ca1731376ad211472d4e0ea56ae8f1a63de6c6a", kill_on_drop: false }`
[INFO] [stdout] 0287e668467159131256adb45ca1731376ad211472d4e0ea56ae8f1a63de6c6a
