[INFO] cloning repository https://github.com/guozhouwei/helloworld
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guozhouwei/helloworld" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguozhouwei%2Fhelloworld", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguozhouwei%2Fhelloworld'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aaf4db519691b0943c7b7d46ff688d032346555b
[INFO] building guozhouwei/helloworld against try#9a3ef2cd3ecaae3c6ef59768612837d797602a6d for pr-137044-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguozhouwei%2Fhelloworld" "/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/guozhouwei/helloworld on toolchain 9a3ef2cd3ecaae3c6ef59768612837d797602a6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guozhouwei/helloworld
[INFO] finished tweaking git repo https://github.com/guozhouwei/helloworld
[INFO] tweaked toml for git repo https://github.com/guozhouwei/helloworld written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/guozhouwei/helloworld 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" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a31afd13adcea428de7e9103959aec25cc8aaa20c5f3e71066a8b8df2fcc3a3
[INFO] running `Command { std: "docker" "start" "-a" "1a31afd13adcea428de7e9103959aec25cc8aaa20c5f3e71066a8b8df2fcc3a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a31afd13adcea428de7e9103959aec25cc8aaa20c5f3e71066a8b8df2fcc3a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a31afd13adcea428de7e9103959aec25cc8aaa20c5f3e71066a8b8df2fcc3a3", kill_on_drop: false }`
[INFO] [stdout] 1a31afd13adcea428de7e9103959aec25cc8aaa20c5f3e71066a8b8df2fcc3a3
[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=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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f34063e6a22e09f316067aee78f319ece0100f130b071de3c3230ab5365075ad
[INFO] running `Command { std: "docker" "start" "-a" "f34063e6a22e09f316067aee78f319ece0100f130b071de3c3230ab5365075ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling helloworld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::f32::consts::E`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::f32::consts::E;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `stdout`
[INFO] [stdout]  --> src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, stdout};
[INFO] [stdout]   |                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `result` and `string`
[INFO] [stdout]  --> src/main.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{string, result};
[INFO] [stdout]   |           ^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `club`
[INFO] [stdout]   --> src/main.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let club = self.clubs.get(remove_club_number-1).unwrap();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_club`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `compulsory`, and `teacher_name` are never read
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Course {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 12 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     compulsory: bool,  //true 必修课，false 选修课
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     teacher_name: String,  //授课老师
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Course` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `content` are never read
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Club {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 22 |     name: String,   //社团名称
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 23 |     content: String,  //社团职责内容
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Club` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `grade`, `faculty`, and `speciality` are never read
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct GradeClass {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     name:String, //班级名称
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     grade: String,  //年级
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 33 |     faculty: String,   //院系
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 34 |     speciality: String,   //专业
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `GradeClass` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `age`, `gradeclass`, and `courses` are never read
[INFO] [stdout]   --> src/main.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct Student {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 76 |     name: String,  //姓名
[INFO] [stdout] 77 |     age: u8,   //年龄
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 78 |     gender: Gender,   //性别
[INFO] [stdout] 79 |     gradeclass: GradeClass, //班级
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 80 |     clubs: Vec<Club>, //参加的社团
[INFO] [stdout] 81 |     courses: Vec<Course>, //学习的课程
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Student` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `gradeClass` should have a snake case name
[INFO] [stdout]    --> src/main.rs:250:13
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let gradeClass = GradeClass {
[INFO] [stdout]     |             ^^^^^^^^^^ help: convert the identifier to snake case: `grade_class`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "f34063e6a22e09f316067aee78f319ece0100f130b071de3c3230ab5365075ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f34063e6a22e09f316067aee78f319ece0100f130b071de3c3230ab5365075ad", kill_on_drop: false }`
[INFO] [stdout] f34063e6a22e09f316067aee78f319ece0100f130b071de3c3230ab5365075ad
[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=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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9f5d40647fbcaf13c5ad6ab0dee21a20cd2c91044bc65df71a5a93daf06beb6
[INFO] running `Command { std: "docker" "start" "-a" "a9f5d40647fbcaf13c5ad6ab0dee21a20cd2c91044bc65df71a5a93daf06beb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling helloworld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::f32::consts::E`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::f32::consts::E;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `stdout`
[INFO] [stdout]  --> src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, stdout};
[INFO] [stdout]   |                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `result` and `string`
[INFO] [stdout]  --> src/main.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{string, result};
[INFO] [stdout]   |           ^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `club`
[INFO] [stdout]   --> src/main.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let club = self.clubs.get(remove_club_number-1).unwrap();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_club`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `compulsory`, and `teacher_name` are never read
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Course {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 12 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     compulsory: bool,  //true 必修课，false 选修课
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     teacher_name: String,  //授课老师
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Course` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `content` are never read
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Club {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 22 |     name: String,   //社团名称
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 23 |     content: String,  //社团职责内容
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Club` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `grade`, `faculty`, and `speciality` are never read
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct GradeClass {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     name:String, //班级名称
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     grade: String,  //年级
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 33 |     faculty: String,   //院系
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 34 |     speciality: String,   //专业
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `GradeClass` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `age`, `gradeclass`, and `courses` are never read
[INFO] [stdout]   --> src/main.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct Student {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 76 |     name: String,  //姓名
[INFO] [stdout] 77 |     age: u8,   //年龄
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 78 |     gender: Gender,   //性别
[INFO] [stdout] 79 |     gradeclass: GradeClass, //班级
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 80 |     clubs: Vec<Club>, //参加的社团
[INFO] [stdout] 81 |     courses: Vec<Course>, //学习的课程
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Student` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `gradeClass` should have a snake case name
[INFO] [stdout]    --> src/main.rs:250:13
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let gradeClass = GradeClass {
[INFO] [stdout]     |             ^^^^^^^^^^ help: convert the identifier to snake case: `grade_class`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "a9f5d40647fbcaf13c5ad6ab0dee21a20cd2c91044bc65df71a5a93daf06beb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9f5d40647fbcaf13c5ad6ab0dee21a20cd2c91044bc65df71a5a93daf06beb6", kill_on_drop: false }`
[INFO] [stdout] a9f5d40647fbcaf13c5ad6ab0dee21a20cd2c91044bc65df71a5a93daf06beb6