[INFO] cloning repository https://github.com/MBlev/recommender-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MBlev/recommender-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMBlev%2Frecommender-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMBlev%2Frecommender-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c809256445275209400e024d92bf4a3ec72d08e7
[INFO] checking MBlev/recommender-system against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMBlev%2Frecommender-system" "/workspace/builds/worker-8/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/MBlev/recommender-system on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MBlev/recommender-system
[INFO] finished tweaking git repo https://github.com/MBlev/recommender-system
[INFO] tweaked toml for git repo https://github.com/MBlev/recommender-system written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/MBlev/recommender-system already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec1527c6c1d687866f7f682cdffe411fa314b6281e14a48801ac69356a43f211
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ec1527c6c1d687866f7f682cdffe411fa314b6281e14a48801ac69356a43f211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec1527c6c1d687866f7f682cdffe411fa314b6281e14a48801ac69356a43f211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec1527c6c1d687866f7f682cdffe411fa314b6281e14a48801ac69356a43f211", kill_on_drop: false }`
[INFO] [stdout] ec1527c6c1d687866f7f682cdffe411fa314b6281e14a48801ac69356a43f211
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8081f70670c083474242d59c16eb5dfe8886ead690485d37e96a59a3584bf3ef
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8081f70670c083474242d59c16eb5dfe8886ead690485d37e96a59a3584bf3ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.24
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking generic_controller v0.1.0 (/opt/rustwide/workdir/generic_controller)
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]     Checking diesel v1.4.4
[INFO] [stderr]     Checking movie_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/movie_controller)
[INFO] [stderr]     Checking book_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/book_controller)
[INFO] [stderr]     Checking small_movielens_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/small_movielens_controller)
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> specific_controllers/small_movielens_controller/src/sml_controller.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn get_user_by_name(&self, name: &str) -> Vec<SMUser>{
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> specific_controllers/book_controller/src/b_controller.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn get_user_by_name(&self, name: &str) -> Vec<BUser>{
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> specific_controllers/book_controller/src/b_controller.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn get_user_by_name(&self, name: &str) -> Vec<BUser>{
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> specific_controllers/small_movielens_controller/src/sml_controller.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn get_user_by_name(&self, name: &str) -> Vec<SMUser>{
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `movies`, `users`
[INFO] [stdout]  --> specific_controllers/small_movielens_controller/src/bin/load_data.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use small_movielens_controller::schema::{users, movies, scores};
[INFO] [stdout]   |                                          ^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `movies`, `users`
[INFO] [stdout]  --> specific_controllers/small_movielens_controller/src/bin/load_data.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use small_movielens_controller::schema::{users, movies, scores};
[INFO] [stdout]   |                                          ^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking recommendation-system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> specific_controllers/small_movielens_controller/src/bin/load_data.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     for chunk in vector_users.chunks(10000) {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> specific_controllers/small_movielens_controller/src/bin/load_data.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     for chunk in vector_movies.chunks(10000) {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> specific_controllers/small_movielens_controller/src/bin/load_data.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     for chunk in vector_users.chunks(10000) {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> specific_controllers/small_movielens_controller/src/bin/load_data.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     for chunk in vector_movies.chunks(10000) {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/distances_item.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 |         for (item, score) in scores {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_user` is never read
[INFO] [stdout]    --> src/movie_api.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let mut result_user = Vec::new();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/distances_item.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 |         for (item, score) in scores {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]    --> src/movie_api.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let mut result_item = Vec::new();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]    --> src/movie_api.rs:226:10
[INFO] [stdout]     |
[INFO] [stdout] 226 |     for (user, scores) in &all_scores {
[INFO] [stdout]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]    --> src/movie_api.rs:227:20
[INFO] [stdout]     |
[INFO] [stdout] 227 |         for (item, score) in scores {
[INFO] [stdout]     |                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it`
[INFO] [stdout]    --> src/movie_api.rs:238:9
[INFO] [stdout]     |
[INFO] [stdout] 238 |     for it in &items {
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_it`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]   --> src/book_api.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut result_item = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]   --> src/small_movielens_api.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut result_item = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_user` is never read
[INFO] [stdout]    --> src/movie_api.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let mut result_user = Vec::new();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]    --> src/movie_api.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let mut result_item = Vec::new();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]    --> src/movie_api.rs:226:10
[INFO] [stdout]     |
[INFO] [stdout] 226 |     for (user, scores) in &all_scores {
[INFO] [stdout]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]    --> src/movie_api.rs:227:20
[INFO] [stdout]     |
[INFO] [stdout] 227 |         for (item, score) in scores {
[INFO] [stdout]     |                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it`
[INFO] [stdout]    --> src/movie_api.rs:238:9
[INFO] [stdout]     |
[INFO] [stdout] 238 |     for it in &items {
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_it`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]   --> src/book_api.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut result_item = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]   --> src/small_movielens_api.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut result_item = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.88s
[INFO] running `Command { std: "docker" "inspect" "8081f70670c083474242d59c16eb5dfe8886ead690485d37e96a59a3584bf3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8081f70670c083474242d59c16eb5dfe8886ead690485d37e96a59a3584bf3ef", kill_on_drop: false }`
[INFO] [stdout] 8081f70670c083474242d59c16eb5dfe8886ead690485d37e96a59a3584bf3ef