[INFO] cloning repository https://github.com/lele-maxwell/class_gp_management
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lele-maxwell/class_gp_management" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flele-maxwell%2Fclass_gp_management", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flele-maxwell%2Fclass_gp_management'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f219391c3e2ac588ac7df224286c729802d3584
[INFO] checking lele-maxwell/class_gp_management against master#19f42cb9bb65555e7d95dab7d17573ae6c5d634c for pr-139087
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flele-maxwell%2Fclass_gp_management" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lele-maxwell/class_gp_management on toolchain 19f42cb9bb65555e7d95dab7d17573ae6c5d634c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lele-maxwell/class_gp_management
[INFO] finished tweaking git repo https://github.com/lele-maxwell/class_gp_management
[INFO] tweaked toml for git repo https://github.com/lele-maxwell/class_gp_management written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lele-maxwell/class_gp_management 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" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8ff25f71e77adf41b8d284c105f157751d55c833370f244431fdb3d3176ac46
[INFO] running `Command { std: "docker" "start" "-a" "d8ff25f71e77adf41b8d284c105f157751d55c833370f244431fdb3d3176ac46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8ff25f71e77adf41b8d284c105f157751d55c833370f244431fdb3d3176ac46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8ff25f71e77adf41b8d284c105f157751d55c833370f244431fdb3d3176ac46", kill_on_drop: false }`
[INFO] [stdout] d8ff25f71e77adf41b8d284c105f157751d55c833370f244431fdb3d3176ac46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+19f42cb9bb65555e7d95dab7d17573ae6c5d634c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0bb9350b94565b5a3b4a2565043429c7526ea633ce04e99deac54f86834d938
[INFO] running `Command { std: "docker" "start" "-a" "b0bb9350b94565b5a3b4a2565043429c7526ea633ce04e99deac54f86834d938", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking class_gp_management v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `label` is never read
[INFO] [stdout]   --> src/models/group.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct Group {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 9  |     id: u32,
[INFO] [stdout] 10 |     label: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Group` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_label` is never used
[INFO] [stdout]   --> src/models/group.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Group {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn get_label(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `title`, and `difficulty` are never read
[INFO] [stdout]  --> src/models/topic.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Topic {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 7 |     id: u32,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 8 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 9 |     difficulty: Difficulty,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Topic` 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 `id` and `name` are never read
[INFO] [stdout]  --> src/models/student.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Student {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 6 |     id: u32,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 7 |     name: String,
[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: variants `Alphabet` and `AlphabetNumeric` are never constructed
[INFO] [stdout]  --> src/enums/labelling.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Labelling {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     Alphabet,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 6 |     AlphabetNumeric,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Labelling` 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: method `to_string` is never used
[INFO] [stdout]   --> src/enums/labelling.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Labelling {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 10 |     // Convert the enum variant to a string
[INFO] [stdout] 11 |     pub fn to_string(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `label` is never read
[INFO] [stdout]   --> src/models/group.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct Group {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 9  |     id: u32,
[INFO] [stdout] 10 |     label: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Group` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_label` is never used
[INFO] [stdout]   --> src/models/group.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Group {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn get_label(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `title`, and `difficulty` are never read
[INFO] [stdout]  --> src/models/topic.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Topic {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 7 |     id: u32,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 8 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 9 |     difficulty: Difficulty,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Topic` 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 `id` and `name` are never read
[INFO] [stdout]  --> src/models/student.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Student {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 6 |     id: u32,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 7 |     name: String,
[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: variants `Alphabet` and `AlphabetNumeric` are never constructed
[INFO] [stdout]  --> src/enums/labelling.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Labelling {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     Alphabet,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 6 |     AlphabetNumeric,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Labelling` 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: method `to_string` is never used
[INFO] [stdout]   --> src/enums/labelling.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Labelling {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 10 |     // Convert the enum variant to a string
[INFO] [stdout] 11 |     pub fn to_string(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.73s
[INFO] running `Command { std: "docker" "inspect" "b0bb9350b94565b5a3b4a2565043429c7526ea633ce04e99deac54f86834d938", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0bb9350b94565b5a3b4a2565043429c7526ea633ce04e99deac54f86834d938", kill_on_drop: false }`
[INFO] [stdout] b0bb9350b94565b5a3b4a2565043429c7526ea633ce04e99deac54f86834d938