[INFO] cloning repository https://github.com/MrMineev/Different-Recommendation-Systems
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MrMineev/Different-Recommendation-Systems" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrMineev%2FDifferent-Recommendation-Systems", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrMineev%2FDifferent-Recommendation-Systems'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 41e527ee89c689dc7d93c1a2858eb1312d8adaea
[INFO] checking MrMineev/Different-Recommendation-Systems against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrMineev%2FDifferent-Recommendation-Systems" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/MrMineev/Different-Recommendation-Systems
[INFO] finished tweaking git repo https://github.com/MrMineev/Different-Recommendation-Systems
[INFO] tweaked toml for git repo https://github.com/MrMineev/Different-Recommendation-Systems written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MrMineev/Different-Recommendation-Systems on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MrMineev/Different-Recommendation-Systems 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08462927385f4c555ecfe4ba25a66274310819936d3fa6b6f10b37dc8d793aeb
[INFO] running `Command { std: "docker" "start" "-a" "08462927385f4c555ecfe4ba25a66274310819936d3fa6b6f10b37dc8d793aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08462927385f4c555ecfe4ba25a66274310819936d3fa6b6f10b37dc8d793aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08462927385f4c555ecfe4ba25a66274310819936d3fa6b6f10b37dc8d793aeb", kill_on_drop: false }`
[INFO] [stdout] 08462927385f4c555ecfe4ba25a66274310819936d3fa6b6f10b37dc8d793aeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e341a088652a3f7abb8b2e63a6a9303209786ee9a36b7ac6e14ad65a48413c3a
[INFO] running `Command { std: "docker" "start" "-a" "e341a088652a3f7abb8b2e63a6a9303209786ee9a36b7ac6e14ad65a48413c3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]    Compiling cli-table-derive v0.4.5
[INFO] [stderr]     Checking csv v1.2.2
[INFO] [stderr]     Checking cli-table v0.4.7
[INFO] [stderr]     Checking RecommendationSystem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/collaborative_filtering/system.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::HashMap;
[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: `format::Justify` and `print_stdout`
[INFO] [stdout]  --> src/logger/logger.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use cli_table::{format::Justify, print_stdout, Cell, CellStruct, Style, Table};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::object::object::Object`
[INFO] [stdout]  --> src/person/person.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::object::object::Object;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/person/person.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/collaborative_filtering/system.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::HashMap;
[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: `format::Justify` and `print_stdout`
[INFO] [stdout]  --> src/logger/logger.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use cli_table::{format::Justify, print_stdout, Cell, CellStruct, Style, Table};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::object::object::Object`
[INFO] [stdout]  --> src/person/person.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::object::object::Object;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/person/person.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/test/test.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         for j in 0..5 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `rate`, `add_product`, and `add_person` are never used
[INFO] [stdout]   --> src/collaborative_filtering/system.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl System {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 15 |     pub fn rate(&mut self, person_id: u64, object_id: u64, review: u8) { // this function rates a Object
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn add_product(&mut self, product: Object) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn add_person(&mut self, person: Person) {
[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 `name` and `description` are never read
[INFO] [stdout]  --> src/object/object.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Object {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     description: String,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Object` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `init` is never used
[INFO] [stdout]  --> src/object/object.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Object {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn init(name: &str, description: &str) -> Object {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `error`, `result`, `assert`, `execution_report`, and `show_rankings` are never used
[INFO] [stdout]   --> src/logger/logger.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Logger {
[INFO] [stdout]    | ----------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn error(location: String, message: String) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn result(location: String, message: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn assert(expression: bool, location: String, message: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn execution_report(time: &String, status: &String) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     pub fn show_rankings(rankings: &Vec<(usize, usize)>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `abs` is never used
[INFO] [stdout]  --> src/person/person.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn abs(n: i32) -> i32 { 
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/collaborative_filtering/system.rs:27:60
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn recommend(&mut self, person_id: u64, feed: i32, N: usize) -> Vec<u64> {
[INFO] [stdout]    |                                                            ^ help: convert the identifier to snake case: `n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/test/test.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         for j in 0..5 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `rate`, `add_product`, and `add_person` are never used
[INFO] [stdout]   --> src/collaborative_filtering/system.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl System {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 15 |     pub fn rate(&mut self, person_id: u64, object_id: u64, review: u8) { // this function rates a Object
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn add_product(&mut self, product: Object) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn add_person(&mut self, person: Person) {
[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 `name` and `description` are never read
[INFO] [stdout]  --> src/object/object.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Object {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     description: String,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Object` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `init` is never used
[INFO] [stdout]  --> src/object/object.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Object {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn init(name: &str, description: &str) -> Object {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `error`, `result`, `assert`, `execution_report`, and `show_rankings` are never used
[INFO] [stdout]   --> src/logger/logger.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Logger {
[INFO] [stdout]    | ----------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn error(location: String, message: String) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn result(location: String, message: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn assert(expression: bool, location: String, message: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn execution_report(time: &String, status: &String) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     pub fn show_rankings(rankings: &Vec<(usize, usize)>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `abs` is never used
[INFO] [stdout]  --> src/person/person.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn abs(n: i32) -> i32 { 
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/collaborative_filtering/system.rs:27:60
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn recommend(&mut self, person_id: u64, feed: i32, N: usize) -> Vec<u64> {
[INFO] [stdout]    |                                                            ^ help: convert the identifier to snake case: `n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.98s
[INFO] running `Command { std: "docker" "inspect" "e341a088652a3f7abb8b2e63a6a9303209786ee9a36b7ac6e14ad65a48413c3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e341a088652a3f7abb8b2e63a6a9303209786ee9a36b7ac6e14ad65a48413c3a", kill_on_drop: false }`
[INFO] [stdout] e341a088652a3f7abb8b2e63a6a9303209786ee9a36b7ac6e14ad65a48413c3a
