[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] testing MBlev/recommender-system against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMBlev%2Frecommender-system" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MBlev/recommender-system on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "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-5/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" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.17
[INFO] [stderr]   Downloaded syn v1.0.24
[INFO] [stderr]   Downloaded csv v1.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56bc7018bdff825ea91bada2bd75e39464217b396ac5afaf6639912177c085dd
[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" "56bc7018bdff825ea91bada2bd75e39464217b396ac5afaf6639912177c085dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56bc7018bdff825ea91bada2bd75e39464217b396ac5afaf6639912177c085dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56bc7018bdff825ea91bada2bd75e39464217b396ac5afaf6639912177c085dd", kill_on_drop: false }`
[INFO] [stdout] 56bc7018bdff825ea91bada2bd75e39464217b396ac5afaf6639912177c085dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b62e9d782f4d2d37160e9dad8f825bd4a45b14167248cf0c74f3bcc2ab4eeaf
[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" "8b62e9d782f4d2d37160e9dad8f825bd4a45b14167248cf0c74f3bcc2ab4eeaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.110
[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 generic_controller v0.1.0 (/opt/rustwide/workdir/generic_controller)
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]    Compiling diesel v1.4.4
[INFO] [stderr]    Compiling movie_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/movie_controller)
[INFO] [stderr]    Compiling small_movielens_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/small_movielens_controller)
[INFO] [stderr]    Compiling book_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/book_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: 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling recommendation-system v0.1.0 (/opt/rustwide/workdir)
[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:106:13
[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:124:13
[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:65:13
[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:69:13
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.77s
[INFO] running `Command { std: "docker" "inspect" "8b62e9d782f4d2d37160e9dad8f825bd4a45b14167248cf0c74f3bcc2ab4eeaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b62e9d782f4d2d37160e9dad8f825bd4a45b14167248cf0c74f3bcc2ab4eeaf", kill_on_drop: false }`
[INFO] [stdout] 8b62e9d782f4d2d37160e9dad8f825bd4a45b14167248cf0c74f3bcc2ab4eeaf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e4d2baa552110a6a5e168f3e91338076cd0381d66cc8e68d9072914cad650dc2
[INFO] running `Command { std: "docker" "start" "-a" "e4d2baa552110a6a5e168f3e91338076cd0381d66cc8e68d9072914cad650dc2", kill_on_drop: false }`
[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] [stderr]    Compiling recommendation-system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning 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:106:13
[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:124:13
[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:65:13
[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:69:13
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "e4d2baa552110a6a5e168f3e91338076cd0381d66cc8e68d9072914cad650dc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4d2baa552110a6a5e168f3e91338076cd0381d66cc8e68d9072914cad650dc2", kill_on_drop: false }`
[INFO] [stdout] e4d2baa552110a6a5e168f3e91338076cd0381d66cc8e68d9072914cad650dc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2d90f53fccc314737cb33e513786946ddd6b9ece08eb4bf7237d1a001e3a8bee
[INFO] running `Command { std: "docker" "start" "-a" "2d90f53fccc314737cb33e513786946ddd6b9ece08eb4bf7237d1a001e3a8bee", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> specific_controllers/book_controller/src/b_controller.rs:25:29
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn get_user_by_name(&self, name: &str) -> Vec<BUser>{
[INFO] [stderr]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> specific_controllers/small_movielens_controller/src/sml_controller.rs:25:29
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn get_user_by_name(&self, name: &str) -> Vec<SMUser>{
[INFO] [stderr]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/distances_item.rs:15:14
[INFO] [stderr]    |
[INFO] [stderr] 15 |         for (item, score) in scores {
[INFO] [stderr]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result_user` is never read
[INFO] [stderr]    --> src/movie_api.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let mut result_user = Vec::new();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result_item` is never read
[INFO] [stderr]    --> src/movie_api.rs:124:13
[INFO] [stderr]     |
[INFO] [stderr] 124 |     let mut result_item = Vec::new();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user`
[INFO] [stderr]    --> src/movie_api.rs:226:10
[INFO] [stderr]     |
[INFO] [stderr] 226 |     for (user, scores) in &all_scores {
[INFO] [stderr]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `score`
[INFO] [stderr]    --> src/movie_api.rs:227:20
[INFO] [stderr]     |
[INFO] [stderr] 227 |         for (item, score) in scores {
[INFO] [stderr]     |                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `it`
[INFO] [stderr]    --> src/movie_api.rs:238:9
[INFO] [stderr]     |
[INFO] [stderr] 238 |     for it in &items {
[INFO] [stderr]     |         ^^ help: if this is intentional, prefix it with an underscore: `_it`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result_item` is never read
[INFO] [stderr]   --> src/book_api.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let mut result_item = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result_item` is never read
[INFO] [stderr]   --> src/small_movielens_api.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let mut result_item = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/recommendation_system-7f7e9289399ad805)
[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" "2d90f53fccc314737cb33e513786946ddd6b9ece08eb4bf7237d1a001e3a8bee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d90f53fccc314737cb33e513786946ddd6b9ece08eb4bf7237d1a001e3a8bee", kill_on_drop: false }`
[INFO] [stdout] 2d90f53fccc314737cb33e513786946ddd6b9ece08eb4bf7237d1a001e3a8bee