[INFO] updating cached repository ahu2012/making_recommendations
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ahu2012/making_recommendations
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ahu2012/making_recommendations" "work/ex/clippy-test-run/sources/stable/gh/ahu2012/making_recommendations"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ahu2012/making_recommendations'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ahu2012/making_recommendations" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ahu2012/making_recommendations"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ahu2012/making_recommendations'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b676aae1e4664efbf65bb0680de0d0ab6044ad2b
[INFO] sha for GitHub repo ahu2012/making_recommendations: b676aae1e4664efbf65bb0680de0d0ab6044ad2b
[INFO] validating manifest of ahu2012/making_recommendations on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ahu2012/making_recommendations on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ahu2012/making_recommendations
[INFO] finished frobbing ahu2012/making_recommendations
[INFO] frobbed toml for ahu2012/making_recommendations written to work/ex/clippy-test-run/sources/stable/gh/ahu2012/making_recommendations/Cargo.toml
[INFO] started frobbing ahu2012/making_recommendations
[INFO] finished frobbing ahu2012/making_recommendations
[INFO] frobbed toml for ahu2012/making_recommendations written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ahu2012/making_recommendations/Cargo.toml
[INFO] crate ahu2012/making_recommendations has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting ahu2012/making_recommendations against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ahu2012/making_recommendations:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dclippy::into_iter_on_array" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 658cc7cc3d8af4719ae1334451bc1e9785ec2f740c6a7e96b52db1ccae4305a3
[INFO] running `"docker" "start" "-a" "658cc7cc3d8af4719ae1334451bc1e9785ec2f740c6a7e96b52db1ccae4305a3"`
[INFO] [stderr]     Checking making_recommendations v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     return 1.0 / (1.0 + euclid_distance.sqrt());
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `1.0 / (1.0 + euclid_distance.sqrt())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     return num / den
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `num / den`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 |     return subset_hashmap;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `subset_hashmap`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 |     return score_vec[0..n].to_vec();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `score_vec[0..n].to_vec()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     return normalized_score_vec;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `normalized_score_vec`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:192:5
[INFO] [stderr]     |
[INFO] [stderr] 192 |     return transposed_pref;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `transposed_pref`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     return 1.0 / (1.0 + euclid_distance.sqrt());
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `1.0 / (1.0 + euclid_distance.sqrt())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     return num / den
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `num / den`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 |     return subset_hashmap;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `subset_hashmap`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 |     return score_vec[0..n].to_vec();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `score_vec[0..n].to_vec()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     return normalized_score_vec;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `normalized_score_vec`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:192:5
[INFO] [stderr]     |
[INFO] [stderr] 192 |     return transposed_pref;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `transposed_pref`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/main.rs:99:32
[INFO] [stderr]    |
[INFO] [stderr] 99 |         cross_sum += score_1 * obj2_preferences.get(item).unwrap();
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&obj2_preferences[item]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/main.rs:174:24
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let item_sim = movie_sim_sums.get(item).unwrap();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&movie_sim_sums[item]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]    --> src/main.rs:188:57
[INFO] [stderr]     |
[INFO] [stderr] 188 |             let new_inner = transposed_pref.entry(item).or_insert(HashMap::new());
[INFO] [stderr]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(HashMap::new)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/main.rs:99:32
[INFO] [stderr]    |
[INFO] [stderr] 99 |         cross_sum += score_1 * obj2_preferences.get(item).unwrap();
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&obj2_preferences[item]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/main.rs:174:24
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let item_sim = movie_sim_sums.get(item).unwrap();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&movie_sim_sums[item]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]    --> src/main.rs:188:57
[INFO] [stderr]     |
[INFO] [stderr] 188 |             let new_inner = transposed_pref.entry(item).or_insert(HashMap::new());
[INFO] [stderr]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(HashMap::new)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "658cc7cc3d8af4719ae1334451bc1e9785ec2f740c6a7e96b52db1ccae4305a3"`
[INFO] running `"docker" "rm" "-f" "658cc7cc3d8af4719ae1334451bc1e9785ec2f740c6a7e96b52db1ccae4305a3"`
[INFO] [stdout] 658cc7cc3d8af4719ae1334451bc1e9785ec2f740c6a7e96b52db1ccae4305a3