[INFO] updating cached repository chrisshyi/kosarajuSCC
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chrisshyi/kosarajuSCC
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/kosarajuSCC" "work/ex/clippy-test-run/sources/stable/gh/chrisshyi/kosarajuSCC"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/chrisshyi/kosarajuSCC'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/kosarajuSCC" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/chrisshyi/kosarajuSCC"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/chrisshyi/kosarajuSCC'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fd8d6e8222600650dfcde4949060a7d698a8a26c
[INFO] sha for GitHub repo chrisshyi/kosarajuSCC: fd8d6e8222600650dfcde4949060a7d698a8a26c
[INFO] validating manifest of chrisshyi/kosarajuSCC 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 chrisshyi/kosarajuSCC 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 chrisshyi/kosarajuSCC
[INFO] finished frobbing chrisshyi/kosarajuSCC
[INFO] frobbed toml for chrisshyi/kosarajuSCC written to work/ex/clippy-test-run/sources/stable/gh/chrisshyi/kosarajuSCC/Cargo.toml
[INFO] started frobbing chrisshyi/kosarajuSCC
[INFO] finished frobbing chrisshyi/kosarajuSCC
[INFO] frobbed toml for chrisshyi/kosarajuSCC written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/chrisshyi/kosarajuSCC/Cargo.toml
[INFO] crate chrisshyi/kosarajuSCC 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 chrisshyi/kosarajuSCC 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/chrisshyi/kosarajuSCC:/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] 715ed6a20f5483d6190d5d53c2d79a1df997ec727ae4f7b57af8bf7c7a26111a
[INFO] running `"docker" "start" "-a" "715ed6a20f5483d6190d5d53c2d79a1df997ec727ae4f7b57af8bf7c7a26111a"`
[INFO] [stderr]     Checking kosarajuSCC v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/lib.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     scc_map
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/lib.rs:19:19
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let scc_map = dfs_outer(relabelled_graph, false, num_vertices);
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/lib.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     scc_map
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/lib.rs:19:19
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let scc_map = dfs_outer(relabelled_graph, false, num_vertices);
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |              ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |                              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:14
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:30
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |                              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |              ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |                              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:14
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:30
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |                              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/lib.rs:50:49
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let neighbors = graph.entry(head_vertx).or_insert(HashSet::new());
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(HashSet::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: an inclusive range would be more readable
[INFO] [stderr]   --> src/lib.rs:74:19
[INFO] [stderr]    |
[INFO] [stderr] 74 |     for vertex in (1..num_vertices + 1).rev() {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^ help: use: `(1..=num_vertices)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]    --> src/lib.rs:147:55
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let neighbors = graph.entry(*relabelled_tail).or_insert(HashSet::new());
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(HashSet::new)`
[INFO] [stderr]     |
[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: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/lib.rs:50:49
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let neighbors = graph.entry(head_vertx).or_insert(HashSet::new());
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(HashSet::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: an inclusive range would be more readable
[INFO] [stderr]   --> src/lib.rs:74:19
[INFO] [stderr]    |
[INFO] [stderr] 74 |     for vertex in (1..num_vertices + 1).rev() {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^ help: use: `(1..=num_vertices)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]    --> src/lib.rs:147:55
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let neighbors = graph.entry(*relabelled_tail).or_insert(HashSet::new());
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(HashSet::new)`
[INFO] [stderr]     |
[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/lib.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |         assert!(reverse_graph.get(&4).unwrap().contains(&2));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&reverse_graph[&4]`
[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/lib.rs:166:17
[INFO] [stderr]     |
[INFO] [stderr] 166 |         assert!(reverse_graph.get(&2).unwrap().contains(&1));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&reverse_graph[&2]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:167:17
[INFO] [stderr]     |
[INFO] [stderr] 167 |         assert!(reverse_graph.get(&1).unwrap().contains(&3));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&reverse_graph[&1]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:168:17
[INFO] [stderr]     |
[INFO] [stderr] 168 |         assert!(reverse_graph.get(&3).unwrap().contains(&2));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&reverse_graph[&3]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:198:20
[INFO] [stderr]     |
[INFO] [stderr] 198 |         assert_eq!(relabelled_graph.get(&2).unwrap().len(), 2);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&relabelled_graph[&2]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:199:20
[INFO] [stderr]     |
[INFO] [stderr] 199 |         assert_eq!(relabelled_graph.get(&3).unwrap().len(), 1);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&relabelled_graph[&3]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:200:20
[INFO] [stderr]     |
[INFO] [stderr] 200 |         assert_eq!(relabelled_graph.get(&4).unwrap().len(), 1);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&relabelled_graph[&4]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:201:20
[INFO] [stderr]     |
[INFO] [stderr] 201 |         assert_eq!(relabelled_graph.get(&5).unwrap().len(), 2);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&relabelled_graph[&5]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:202:20
[INFO] [stderr]     |
[INFO] [stderr] 202 |         assert_eq!(relabelled_graph.get(&6).unwrap().len(), 1);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&relabelled_graph[&6]`
[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: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:203:20
[INFO] [stderr]     |
[INFO] [stderr] 203 |         assert_eq!(relabelled_graph.get(&1).unwrap().len(), 1);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&relabelled_graph[&1]`
[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: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `"docker" "inspect" "715ed6a20f5483d6190d5d53c2d79a1df997ec727ae4f7b57af8bf7c7a26111a"`
[INFO] running `"docker" "rm" "-f" "715ed6a20f5483d6190d5d53c2d79a1df997ec727ae4f7b57af8bf7c7a26111a"`
[INFO] [stdout] 715ed6a20f5483d6190d5d53c2d79a1df997ec727ae4f7b57af8bf7c7a26111a