[INFO] cloning repository https://github.com/chalmery/Rust_Learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chalmery/Rust_Learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchalmery%2FRust_Learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchalmery%2FRust_Learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 996360f930460993a5432e24fde9dce2b72f38ef
[INFO] testing chalmery/Rust_Learn against beta-2025-02-18 for beta-1.86-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchalmery%2FRust_Learn" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chalmery/Rust_Learn on toolchain beta-2025-02-18
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-02-18" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chalmery/Rust_Learn
[INFO] finished tweaking git repo https://github.com/chalmery/Rust_Learn
[INFO] tweaked toml for git repo https://github.com/chalmery/Rust_Learn written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/chalmery/Rust_Learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-02-18" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-02-18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 44b11653a9f78faa0d5d382c59d44c52674e540aba770906056e3051cf6b4918
[INFO] running `Command { std: "docker" "start" "-a" "44b11653a9f78faa0d5d382c59d44c52674e540aba770906056e3051cf6b4918", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44b11653a9f78faa0d5d382c59d44c52674e540aba770906056e3051cf6b4918", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44b11653a9f78faa0d5d382c59d44c52674e540aba770906056e3051cf6b4918", kill_on_drop: false }`
[INFO] [stdout] 44b11653a9f78faa0d5d382c59d44c52674e540aba770906056e3051cf6b4918
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-02-18" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98bee5c2808ef0e39b150104d8c2fc6cebbe0be39cd51e7e47d926ee9345de1b
[INFO] running `Command { std: "docker" "start" "-a" "98bee5c2808ef0e39b150104d8c2fc6cebbe0be39cd51e7e47d926ee9345de1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust_learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `News`, `Summary`, and `Tweet`
[INFO] [stdout]  --> src/main.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use l_trait::{News, Summary,Tweet};
[INFO] [stdout]   |               ^^^^  ^^^^^^^ ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/l_trait.rs:41:38
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn notify1<T: Summary>(item1: T, item2: T) {
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/l_trait.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn notify2(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/l_trait.rs:48:38
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn notify3<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: `a`
[INFO] [stdout]   --> src/l_trait.rs:51:51
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stdout]    |                                                   ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/l_trait.rs:51:57
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stdout]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/l_trait.rs:55:18
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/l_trait.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let result = largest(&num);
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `car_res`
[INFO] [stdout]   --> src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let car_res = largest(&chr);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_car_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_res`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let str_res = largest(&str);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `summarize` and `summarize_author` are never used
[INFO] [stdout]  --> src/l_trait.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Summary {
[INFO] [stdout]   |           ------- methods in this trait
[INFO] [stdout] 4 |     //接口方法的默认实现
[INFO] [stdout] 5 |     fn summarize(&self) -> String {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn summarize_author(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `headline` and `location` are never read
[INFO] [stdout]   --> src/l_trait.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct News {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 13 |     pub headline: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 14 |     pub location: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/l_trait.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn notify<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify1` is never used
[INFO] [stdout]   --> src/l_trait.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn notify1<T: Summary>(item1: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify2` is never used
[INFO] [stdout]   --> src/l_trait.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn notify2(item: impl Summary + Display) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify3` is never used
[INFO] [stdout]   --> src/l_trait.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn notify3<T: Summary + Display>(item: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sc` is never used
[INFO] [stdout]   --> src/l_trait.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sc2` is never used
[INFO] [stdout]   --> src/l_trait.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ret` is never used
[INFO] [stdout]   --> src/l_trait.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn ret() -> impl Summary {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/l_trait.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | struct Pair<T>{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/l_trait.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl <T> Pair<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 77 |     fn new (x: T, y:T) -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/l_trait.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | impl <T:Display+PartialOrd> Pair<T> {
[INFO] [stdout]    | ----------------------------------- method in this implementation
[INFO] [stdout] 84 |     fn cmp_display(&self){
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `Command { std: "docker" "inspect" "98bee5c2808ef0e39b150104d8c2fc6cebbe0be39cd51e7e47d926ee9345de1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98bee5c2808ef0e39b150104d8c2fc6cebbe0be39cd51e7e47d926ee9345de1b", kill_on_drop: false }`
[INFO] [stdout] 98bee5c2808ef0e39b150104d8c2fc6cebbe0be39cd51e7e47d926ee9345de1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-02-18" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41c33f1d90278f6517d8e5621ae0c2e4f9634c366caba61d799ea632a1acc555
[INFO] running `Command { std: "docker" "start" "-a" "41c33f1d90278f6517d8e5621ae0c2e4f9634c366caba61d799ea632a1acc555", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `News`, `Summary`, and `Tweet`
[INFO] [stdout]  --> src/main.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use l_trait::{News, Summary,Tweet};
[INFO] [stdout]   |               ^^^^  ^^^^^^^ ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/l_trait.rs:41:38
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn notify1<T: Summary>(item1: T, item2: T) {
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/l_trait.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn notify2(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/l_trait.rs:48:38
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn notify3<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: `a`
[INFO] [stdout]   --> src/l_trait.rs:51:51
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stdout]    |                                                   ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/l_trait.rs:51:57
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stdout]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/l_trait.rs:55:18
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/l_trait.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let result = largest(&num);
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `car_res`
[INFO] [stdout]   --> src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let car_res = largest(&chr);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_car_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_res`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let str_res = largest(&str);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `summarize` and `summarize_author` are never used
[INFO] [stdout]  --> src/l_trait.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Summary {
[INFO] [stdout]   |           ------- methods in this trait
[INFO] [stdout] 4 |     //接口方法的默认实现
[INFO] [stdout] 5 |     fn summarize(&self) -> String {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn summarize_author(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `headline` and `location` are never read
[INFO] [stdout]   --> src/l_trait.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct News {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 13 |     pub headline: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 14 |     pub location: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/l_trait.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn notify<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify1` is never used
[INFO] [stdout]   --> src/l_trait.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn notify1<T: Summary>(item1: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify2` is never used
[INFO] [stdout]   --> src/l_trait.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn notify2(item: impl Summary + Display) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify3` is never used
[INFO] [stdout]   --> src/l_trait.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn notify3<T: Summary + Display>(item: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sc` is never used
[INFO] [stdout]   --> src/l_trait.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sc2` is never used
[INFO] [stdout]   --> src/l_trait.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ret` is never used
[INFO] [stdout]   --> src/l_trait.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn ret() -> impl Summary {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/l_trait.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | struct Pair<T>{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/l_trait.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl <T> Pair<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 77 |     fn new (x: T, y:T) -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/l_trait.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | impl <T:Display+PartialOrd> Pair<T> {
[INFO] [stdout]    | ----------------------------------- method in this implementation
[INFO] [stdout] 84 |     fn cmp_display(&self){
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "41c33f1d90278f6517d8e5621ae0c2e4f9634c366caba61d799ea632a1acc555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41c33f1d90278f6517d8e5621ae0c2e4f9634c366caba61d799ea632a1acc555", kill_on_drop: false }`
[INFO] [stdout] 41c33f1d90278f6517d8e5621ae0c2e4f9634c366caba61d799ea632a1acc555
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-02-18" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d44af0b9d4034e9fe56905ffe0825b5f51218ae6cf3fa7f60cb4f6047ea87163
[INFO] running `Command { std: "docker" "start" "-a" "d44af0b9d4034e9fe56905ffe0825b5f51218ae6cf3fa7f60cb4f6047ea87163", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `News`, `Summary`, and `Tweet`
[INFO] [stderr]  --> src/main.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use l_trait::{News, Summary,Tweet};
[INFO] [stderr]   |               ^^^^  ^^^^^^^ ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item2`
[INFO] [stderr]   --> src/l_trait.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn notify1<T: Summary>(item1: T, item2: T) {
[INFO] [stderr]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/l_trait.rs:46:16
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn notify2(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/l_trait.rs:48:38
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub fn notify3<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: `a`
[INFO] [stderr]   --> src/l_trait.rs:51:51
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stderr]    |                                                   ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/l_trait.rs:51:57
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stderr]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/l_trait.rs:55:18
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stderr]    |                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/l_trait.rs:55:24
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stderr]    |                        ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let result = largest(&num);
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `car_res`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let car_res = largest(&chr);
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_car_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_res`
[INFO] [stderr]   --> src/main.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let str_res = largest(&str);
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_res`
[INFO] [stderr] 
[INFO] [stderr] warning: methods `summarize` and `summarize_author` are never used
[INFO] [stderr]  --> src/l_trait.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub trait Summary {
[INFO] [stderr]   |           ------- methods in this trait
[INFO] [stderr] 4 |     //接口方法的默认实现
[INFO] [stderr] 5 |     fn summarize(&self) -> String {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 9 |     fn summarize_author(&self) -> String;
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `headline` and `location` are never read
[INFO] [stderr]   --> src/l_trait.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct News {
[INFO] [stderr]    |            ---- fields in this struct
[INFO] [stderr] 13 |     pub headline: String,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 14 |     pub location: String,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify` is never used
[INFO] [stderr]   --> src/l_trait.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn notify<T: Summary>(item: T) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify1` is never used
[INFO] [stderr]   --> src/l_trait.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn notify1<T: Summary>(item1: T, item2: T) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify2` is never used
[INFO] [stderr]   --> src/l_trait.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn notify2(item: impl Summary + Display) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify3` is never used
[INFO] [stderr]   --> src/l_trait.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub fn notify3<T: Summary + Display>(item: T) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sc` is never used
[INFO] [stderr]   --> src/l_trait.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn sc<T: Summary + Display, U: Clone + Debug>(a: T, b: U) -> String {
[INFO] [stderr]    |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sc2` is never used
[INFO] [stderr]   --> src/l_trait.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn sc2<T, U>(a: T, b: U) -> String
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ret` is never used
[INFO] [stderr]   --> src/l_trait.rs:65:8
[INFO] [stderr]    |
[INFO] [stderr] 65 | pub fn ret() -> impl Summary {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]   --> src/l_trait.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | struct Pair<T>{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/l_trait.rs:77:8
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl <T> Pair<T> {
[INFO] [stderr]    | ---------------- associated function in this implementation
[INFO] [stderr] 77 |     fn new (x: T, y:T) -> Self{
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]   --> src/l_trait.rs:84:8
[INFO] [stderr]    |
[INFO] [stderr] 83 | impl <T:Display+PartialOrd> Pair<T> {
[INFO] [stderr]    | ----------------------------------- method in this implementation
[INFO] [stderr] 84 |     fn cmp_display(&self){
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_learn` (bin "rust_learn" test) generated 23 warnings (run `cargo fix --bin "rust_learn" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_learn-64f8827d6ed893e9)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_learn-1c0c271c64e96895)
[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]    Doc-tests rust_learn
[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] [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] running `Command { std: "docker" "inspect" "d44af0b9d4034e9fe56905ffe0825b5f51218ae6cf3fa7f60cb4f6047ea87163", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d44af0b9d4034e9fe56905ffe0825b5f51218ae6cf3fa7f60cb4f6047ea87163", kill_on_drop: false }`
[INFO] [stdout] d44af0b9d4034e9fe56905ffe0825b5f51218ae6cf3fa7f60cb4f6047ea87163