[INFO] cloning repository https://github.com/peace0096/CouponSystem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peace0096/CouponSystem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeace0096%2FCouponSystem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeace0096%2FCouponSystem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 844aea36bd97ce3383ab0520a0b26fb5dd443d3d
[INFO] testing peace0096/CouponSystem against try#8da20828b6ea601dfd8e2448cb50ace88876bd78 for pr-150933
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeace0096%2FCouponSystem" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/peace0096/CouponSystem
[INFO] finished tweaking git repo https://github.com/peace0096/CouponSystem
[INFO] tweaked toml for git repo https://github.com/peace0096/CouponSystem written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/peace0096/CouponSystem on toolchain 8da20828b6ea601dfd8e2448cb50ace88876bd78
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8da20828b6ea601dfd8e2448cb50ace88876bd78" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/peace0096/CouponSystem 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" "+8da20828b6ea601dfd8e2448cb50ace88876bd78" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+8da20828b6ea601dfd8e2448cb50ace88876bd78" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b61df3e5311e65d1b1edd3203bc4ae40a57d9a20b4c5636325560143f20e741e
[INFO] running `Command { std: "docker" "start" "-a" "b61df3e5311e65d1b1edd3203bc4ae40a57d9a20b4c5636325560143f20e741e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b61df3e5311e65d1b1edd3203bc4ae40a57d9a20b4c5636325560143f20e741e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b61df3e5311e65d1b1edd3203bc4ae40a57d9a20b4c5636325560143f20e741e", kill_on_drop: false }`
[INFO] [stdout] b61df3e5311e65d1b1edd3203bc4ae40a57d9a20b4c5636325560143f20e741e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+8da20828b6ea601dfd8e2448cb50ace88876bd78" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cea4801b0db8e0e8f67a8296fcdc844532d6a44b9d5e11b15c0c93f8bbe80a0
[INFO] running `Command { std: "docker" "start" "-a" "3cea4801b0db8e0e8f67a8296fcdc844532d6a44b9d5e11b15c0c93f8bbe80a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling getrandom v0.3.2
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling tokio v1.44.1
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`, and `self`
[INFO] [stdout]  --> src/main.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{sync::{Arc, Mutex}, thread::{self}};
[INFO] [stdout]   |                  ^^^  ^^^^^            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cell::OnceCell` and `vec`
[INFO] [stdout]  --> src/system/repository.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{cell::OnceCell, sync::{Arc, Mutex, OnceLock}, vec};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/system/repository.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn delete(&self, id: u64) {
[INFO] [stdout]    |                      ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Entity` is never used
[INFO] [stdout]  --> src/system/object.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Entity {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coupon_id`, `category`, and `percent` are never read
[INFO] [stdout]   --> src/system/object.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Coupon {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 12 |     coupon_id: u64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 13 |     category: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 14 |     percent: f32
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coupon` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CouponBox` is never constructed
[INFO] [stdout]   --> src/system/object.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct CouponBox {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_percent` is never used
[INFO] [stdout]   --> src/system/object.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl Coupon {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn get_percent(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `pop_coupon`, and `create_coupon` are never used
[INFO] [stdout]   --> src/system/object.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | impl CouponBox {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 47 |     pub fn new(percent: f32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     pub fn pop_coupon(&self) -> Option<Coupon> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn create_coupon(&self, id:u64) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]   --> src/system/repository.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Repository<T> {
[INFO] [stdout]    |           ---------- method in this trait
[INFO] [stdout] 11 |     fn save(&self, entity: T) -> bool;
[INFO] [stdout] 12 |     fn delete(&self, id: u64);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pop_coupon` is never used
[INFO] [stdout]   --> src/system/repository.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub trait CouponRepository {
[INFO] [stdout]    |           ---------------- method in this trait
[INFO] [stdout] 52 |     fn pop_coupon(&self) -> Option<Coupon>;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.14s
[INFO] running `Command { std: "docker" "inspect" "3cea4801b0db8e0e8f67a8296fcdc844532d6a44b9d5e11b15c0c93f8bbe80a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cea4801b0db8e0e8f67a8296fcdc844532d6a44b9d5e11b15c0c93f8bbe80a0", kill_on_drop: false }`
[INFO] [stdout] 3cea4801b0db8e0e8f67a8296fcdc844532d6a44b9d5e11b15c0c93f8bbe80a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+8da20828b6ea601dfd8e2448cb50ace88876bd78" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 432b7dfa0e7e7ad17a9751129a6dd90310a727b0fb0febcc586cfe1f9ee80c62
[INFO] running `Command { std: "docker" "start" "-a" "432b7dfa0e7e7ad17a9751129a6dd90310a727b0fb0febcc586cfe1f9ee80c62", kill_on_drop: false }`
[INFO] [stderr]    Compiling study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`, and `self`
[INFO] [stdout]  --> src/main.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{sync::{Arc, Mutex}, thread::{self}};
[INFO] [stdout]   |                  ^^^  ^^^^^            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cell::OnceCell` and `vec`
[INFO] [stdout]  --> src/system/repository.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{cell::OnceCell, sync::{Arc, Mutex, OnceLock}, vec};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/system/repository.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn delete(&self, id: u64) {
[INFO] [stdout]    |                      ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Entity` is never used
[INFO] [stdout]  --> src/system/object.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Entity {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coupon_id`, `category`, and `percent` are never read
[INFO] [stdout]   --> src/system/object.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Coupon {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 12 |     coupon_id: u64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 13 |     category: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 14 |     percent: f32
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coupon` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CouponBox` is never constructed
[INFO] [stdout]   --> src/system/object.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct CouponBox {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_percent` is never used
[INFO] [stdout]   --> src/system/object.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl Coupon {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn get_percent(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `pop_coupon`, and `create_coupon` are never used
[INFO] [stdout]   --> src/system/object.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | impl CouponBox {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 47 |     pub fn new(percent: f32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     pub fn pop_coupon(&self) -> Option<Coupon> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn create_coupon(&self, id:u64) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]   --> src/system/repository.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Repository<T> {
[INFO] [stdout]    |           ---------- method in this trait
[INFO] [stdout] 11 |     fn save(&self, entity: T) -> bool;
[INFO] [stdout] 12 |     fn delete(&self, id: u64);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pop_coupon` is never used
[INFO] [stdout]   --> src/system/repository.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub trait CouponRepository {
[INFO] [stdout]    |           ---------------- method in this trait
[INFO] [stdout] 52 |     fn pop_coupon(&self) -> Option<Coupon>;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "432b7dfa0e7e7ad17a9751129a6dd90310a727b0fb0febcc586cfe1f9ee80c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "432b7dfa0e7e7ad17a9751129a6dd90310a727b0fb0febcc586cfe1f9ee80c62", kill_on_drop: false }`
[INFO] [stdout] 432b7dfa0e7e7ad17a9751129a6dd90310a727b0fb0febcc586cfe1f9ee80c62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+8da20828b6ea601dfd8e2448cb50ace88876bd78" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 49ab35a02f3f012463e5ca00d5295a1adb7a048ae1a10b2681a1dd6cd34ff90a
[INFO] running `Command { std: "docker" "start" "-a" "49ab35a02f3f012463e5ca00d5295a1adb7a048ae1a10b2681a1dd6cd34ff90a", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`, and `self`
[INFO] [stderr]  --> src/main.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{sync::{Arc, Mutex}, thread::{self}};
[INFO] [stderr]   |                  ^^^  ^^^^^            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `cell::OnceCell` and `vec`
[INFO] [stderr]  --> src/system/repository.rs:2:11
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::{cell::OnceCell, sync::{Arc, Mutex, OnceLock}, vec};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/system/repository.rs:41:22
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn delete(&self, id: u64) {
[INFO] [stderr]    |                      ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Entity` is never used
[INFO] [stderr]  --> src/system/object.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub trait Entity {
[INFO] [stderr]   |           ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `coupon_id`, `category`, and `percent` are never read
[INFO] [stderr]   --> src/system/object.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Coupon {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] 12 |     coupon_id: u64,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 13 |     category: u64,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 14 |     percent: f32
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Coupon` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `CouponBox` is never constructed
[INFO] [stderr]   --> src/system/object.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct CouponBox {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_percent` is never used
[INFO] [stderr]   --> src/system/object.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | impl Coupon {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 40 |     pub fn get_percent(&self) -> f32 {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `pop_coupon`, and `create_coupon` are never used
[INFO] [stderr]   --> src/system/object.rs:47:12
[INFO] [stderr]    |
[INFO] [stderr] 46 | impl CouponBox {
[INFO] [stderr]    | -------------- associated items in this implementation
[INFO] [stderr] 47 |     pub fn new(percent: f32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 54 |     pub fn pop_coupon(&self) -> Option<Coupon> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 66 |     pub fn create_coupon(&self, id:u64) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `delete` is never used
[INFO] [stderr]   --> src/system/repository.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub trait Repository<T> {
[INFO] [stderr]    |           ---------- method in this trait
[INFO] [stderr] 11 |     fn save(&self, entity: T) -> bool;
[INFO] [stderr] 12 |     fn delete(&self, id: u64);
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `pop_coupon` is never used
[INFO] [stderr]   --> src/system/repository.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub trait CouponRepository {
[INFO] [stderr]    |           ---------------- method in this trait
[INFO] [stderr] 52 |     fn pop_coupon(&self) -> Option<Coupon>;
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `study` (bin "study" test) generated 10 warnings (run `cargo fix --bin "study" -p study --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/study-9fa8f8ff45d9d553)
[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" "49ab35a02f3f012463e5ca00d5295a1adb7a048ae1a10b2681a1dd6cd34ff90a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49ab35a02f3f012463e5ca00d5295a1adb7a048ae1a10b2681a1dd6cd34ff90a", kill_on_drop: false }`
[INFO] [stdout] 49ab35a02f3f012463e5ca00d5295a1adb7a048ae1a10b2681a1dd6cd34ff90a