[INFO] cloning repository https://github.com/cyt1999/student-management-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cyt1999/student-management-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcyt1999%2Fstudent-management-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcyt1999%2Fstudent-management-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0bf2aeee604948b20fd7f1e8aa58726e1fafb75
[INFO] checking cyt1999/student-management-system against try#e117153a45c546e883c1f91d82611775fcaeffe0 for pr-146470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcyt1999%2Fstudent-management-system" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cyt1999/student-management-system
[INFO] finished tweaking git repo https://github.com/cyt1999/student-management-system
[INFO] tweaked toml for git repo https://github.com/cyt1999/student-management-system written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cyt1999/student-management-system on toolchain e117153a45c546e883c1f91d82611775fcaeffe0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cyt1999/student-management-system 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" "+e117153a45c546e883c1f91d82611775fcaeffe0" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fd60a2ceccbc0a00b2b999e7518d957ec66badeb56cca0ee82a5bc0f1db3efc
[INFO] running `Command { std: "docker" "start" "-a" "7fd60a2ceccbc0a00b2b999e7518d957ec66badeb56cca0ee82a5bc0f1db3efc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fd60a2ceccbc0a00b2b999e7518d957ec66badeb56cca0ee82a5bc0f1db3efc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fd60a2ceccbc0a00b2b999e7518d957ec66badeb56cca0ee82a5bc0f1db3efc", kill_on_drop: false }`
[INFO] [stdout] 7fd60a2ceccbc0a00b2b999e7518d957ec66badeb56cca0ee82a5bc0f1db3efc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6053d8eb38754a1cfd7abbf4b0b2d50c66cc476d32e34c21ee225f5db95d9289
[INFO] running `Command { std: "docker" "start" "-a" "6053d8eb38754a1cfd7abbf4b0b2d50c66cc476d32e34c21ee225f5db95d9289", kill_on_drop: false }`
[INFO] [stderr]     Checking student-management-system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `id`, `name`, and `age` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Student {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 6 |     id: u64,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 7 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     age: u32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Student` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Club {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 17 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 18 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Club` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Class {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 31 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 32 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Class` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/main.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Course {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 39 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 40 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Course` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/main.rs:73:8
[INFO] [stdout]     |
[INFO] [stdout]  57 | impl StudentManagementSystem {
[INFO] [stdout]     | ---------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  73 |     fn update_student(&mut self, student_id: u64, new_name: String, new_age: u32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  86 |     fn delete_student(&mut self, student_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  99 |     fn update_club(&mut self, club_id: u64, new_name: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     fn delete_club(&mut self, club_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     fn update_class(&mut self, class_id: u64, new_name: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 133 |     fn delete_class(&mut self, class_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn update_course(&mut self, course_id: u64, new_name: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |     fn delete_course(&mut self, course_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 171 |         fn remove_student_from_course(&mut self, student_id: u64, course_id: u64) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 192 |         fn leave_club(&mut self, student_id: u64, club_id: u64) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 212 |         fn unassign_student_from_class(&mut self, student_id: u64) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `name`, and `age` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Student {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 6 |     id: u64,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 7 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     age: u32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Student` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Club {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 17 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 18 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Club` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Class {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 31 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 32 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Class` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/main.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Course {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 39 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 40 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Course` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/main.rs:73:8
[INFO] [stdout]     |
[INFO] [stdout]  57 | impl StudentManagementSystem {
[INFO] [stdout]     | ---------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  73 |     fn update_student(&mut self, student_id: u64, new_name: String, new_age: u32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  86 |     fn delete_student(&mut self, student_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  99 |     fn update_club(&mut self, club_id: u64, new_name: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     fn delete_club(&mut self, club_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     fn update_class(&mut self, class_id: u64, new_name: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 133 |     fn delete_class(&mut self, class_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn update_course(&mut self, course_id: u64, new_name: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |     fn delete_course(&mut self, course_id: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 171 |         fn remove_student_from_course(&mut self, student_id: u64, course_id: u64) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 192 |         fn leave_club(&mut self, student_id: u64, club_id: u64) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 212 |         fn unassign_student_from_class(&mut self, student_id: u64) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "6053d8eb38754a1cfd7abbf4b0b2d50c66cc476d32e34c21ee225f5db95d9289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6053d8eb38754a1cfd7abbf4b0b2d50c66cc476d32e34c21ee225f5db95d9289", kill_on_drop: false }`
[INFO] [stdout] 6053d8eb38754a1cfd7abbf4b0b2d50c66cc476d32e34c21ee225f5db95d9289
