[INFO] cloning repository https://github.com/Debulin/rustpro1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Debulin/rustpro1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDebulin%2Frustpro1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDebulin%2Frustpro1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d50da797eed79c0c3743a473070919e71e5c57c
[INFO] checking Debulin/rustpro1/0d50da797eed79c0c3743a473070919e71e5c57c against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDebulin%2Frustpro1" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Debulin/rustpro1 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Debulin/rustpro1
[INFO] finished tweaking git repo https://github.com/Debulin/rustpro1
[INFO] tweaked toml for git repo https://github.com/Debulin/rustpro1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Debulin/rustpro1 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6e208a894ff96c55291abc522835cf89792b5c5b822fde4bc7b0272121e1e50
[INFO] running `Command { std: "docker" "start" "-a" "c6e208a894ff96c55291abc522835cf89792b5c5b822fde4bc7b0272121e1e50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6e208a894ff96c55291abc522835cf89792b5c5b822fde4bc7b0272121e1e50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6e208a894ff96c55291abc522835cf89792b5c5b822fde4bc7b0272121e1e50", kill_on_drop: false }`
[INFO] [stdout] c6e208a894ff96c55291abc522835cf89792b5c5b822fde4bc7b0272121e1e50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9281a8be70a25505f35c5af6a342cb426ae5993fa2e3c8e7a348f62c47331797
[INFO] running `Command { std: "docker" "start" "-a" "9281a8be70a25505f35c5af6a342cb426ae5993fa2e3c8e7a348f62c47331797", kill_on_drop: false }`
[INFO] [stderr]     Checking rustpro1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a_int`
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let a_int = 1u32;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_a_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_bool`
[INFO] [stdout]   --> src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let a_bool = true;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_bool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unit`
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let unit = ();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_unit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/main.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl List {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 12 |     // 创建一个空的 List 实例
[INFO] [stdout] 13 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn prepend(self, elem: u32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn len(&self) -> u32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_int`
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let a_int = 1u32;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_a_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_bool`
[INFO] [stdout]   --> src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let a_bool = true;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_bool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unit`
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let unit = ();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_unit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/main.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl List {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 12 |     // 创建一个空的 List 实例
[INFO] [stdout] 13 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn prepend(self, elem: u32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn len(&self) -> u32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "9281a8be70a25505f35c5af6a342cb426ae5993fa2e3c8e7a348f62c47331797", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9281a8be70a25505f35c5af6a342cb426ae5993fa2e3c8e7a348f62c47331797", kill_on_drop: false }`
[INFO] [stdout] 9281a8be70a25505f35c5af6a342cb426ae5993fa2e3c8e7a348f62c47331797