[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#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMBlev%2Frecommender-system" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MBlev/recommender-system on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "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-0-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.24
[INFO] [stderr]   Downloaded diesel v1.4.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50750264b51b7cf801e5ad68665ade456f95cd2a74cc1556600dc34a3e26156c
[INFO] running `Command { std: "docker" "start" "-a" "50750264b51b7cf801e5ad68665ade456f95cd2a74cc1556600dc34a3e26156c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50750264b51b7cf801e5ad68665ade456f95cd2a74cc1556600dc34a3e26156c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50750264b51b7cf801e5ad68665ade456f95cd2a74cc1556600dc34a3e26156c", kill_on_drop: false }`
[INFO] [stdout] 50750264b51b7cf801e5ad68665ade456f95cd2a74cc1556600dc34a3e26156c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] debb2b5281eb9e9f0a920b91536cb9f25801735739dcaf2f47ac4957841aeead
[INFO] running `Command { std: "docker" "start" "-a" "debb2b5281eb9e9f0a920b91536cb9f25801735739dcaf2f47ac4957841aeead", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling byteorder v1.3.4
[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]     Checking itoa v0.4.5
[INFO] [stderr]     Checking generic_controller v0.1.0 (/opt/rustwide/workdir/generic_controller)
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling quote v1.0.6
[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 small_movielens_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/small_movielens_controller)
[INFO] [stderr]     Checking book_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/book_controller)
[INFO] [stderr]     Checking movie_controller v0.1.0 (/opt/rustwide/workdir/specific_controllers/movie_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/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: 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: 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] [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: 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: 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: 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]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result_item` is never read
[INFO] [stdout]    --> src/movie_api.rs:124:13
[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: 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]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[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: 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: `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: 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: 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] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.42s
[INFO] running `Command { std: "docker" "inspect" "debb2b5281eb9e9f0a920b91536cb9f25801735739dcaf2f47ac4957841aeead", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "debb2b5281eb9e9f0a920b91536cb9f25801735739dcaf2f47ac4957841aeead", kill_on_drop: false }`
[INFO] [stdout] debb2b5281eb9e9f0a920b91536cb9f25801735739dcaf2f47ac4957841aeead
