[INFO] updating cached repository shybyte/exercises-in-programming-style-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shybyte/exercises-in-programming-style-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shybyte/exercises-in-programming-style-rust" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/shybyte/exercises-in-programming-style-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/shybyte/exercises-in-programming-style-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shybyte/exercises-in-programming-style-rust" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shybyte/exercises-in-programming-style-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shybyte/exercises-in-programming-style-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] eeb1242d7416b4a4b163f9be2fdb4c19984f436f
[INFO] sha for GitHub repo shybyte/exercises-in-programming-style-rust: eeb1242d7416b4a4b163f9be2fdb4c19984f436f
[INFO] validating manifest of shybyte/exercises-in-programming-style-rust on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of shybyte/exercises-in-programming-style-rust on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing shybyte/exercises-in-programming-style-rust
[INFO] finished frobbing shybyte/exercises-in-programming-style-rust
[INFO] frobbed toml for shybyte/exercises-in-programming-style-rust written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/shybyte/exercises-in-programming-style-rust/Cargo.toml
[INFO] started frobbing shybyte/exercises-in-programming-style-rust
[INFO] finished frobbing shybyte/exercises-in-programming-style-rust
[INFO] frobbed toml for shybyte/exercises-in-programming-style-rust written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shybyte/exercises-in-programming-style-rust/Cargo.toml
[INFO] crate shybyte/exercises-in-programming-style-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking shybyte/exercises-in-programming-style-rust against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-6/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/shybyte/exercises-in-programming-style-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "-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" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 60476eb2602d388f4d42a0e52fa6cb56b07b598d1ce5de5fcf06067db2f2cc2c
[INFO] running `"docker" "start" "-a" "60476eb2602d388f4d42a0e52fa6cb56b07b598d1ce5de5fcf06067db2f2cc2c"`
[INFO] [stderr]     Checking exercises_in_programming_style_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     /// Takes a path to a file and assigns the entire
[INFO] [stderr] 17 | |     /// contents of the file to the global variable data
[INFO] [stderr]    | |________________________________________________________^
[INFO] [stderr] 18 | /     let read_file = |filename: &str| {
[INFO] [stderr] 19 | |         let mut text = String::new();
[INFO] [stderr] 20 | |         File::open(filename).unwrap().read_to_string(&mut text).unwrap();
[INFO] [stderr] 21 | |         data.borrow_mut().append(&mut text.chars().collect());
[INFO] [stderr] 22 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |       /// Replaces all nonalphanumeric chars in data with white space
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 26 | /     let filter_chars_and_normalize = || {
[INFO] [stderr] 27 | |         for c in data.borrow_mut().iter_mut() {
[INFO] [stderr] 28 | |             if !c.is_alphanumeric() {
[INFO] [stderr] 29 | |                 *c = ' ';
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |         }
[INFO] [stderr] 34 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |       /// Scans data for words, filling the global variable words
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 37 | /     let scan = || {
[INFO] [stderr] 38 | |         let data_str: String = data.borrow().iter().collect();
[INFO] [stderr] 39 | |         words.borrow_mut().append(&mut data_str.split(' ').map(|s| s.to_string()).filter(|s| !s.is_empty()).collect());
[INFO] [stderr] 40 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |       /// Scans data for words, filling the global variable words
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 43 | /     let remove_stop_words = || {
[INFO] [stderr] 44 | |         let mut stop_words: HashSet<String> = BufReader::new(File::open("test-data/stop_words.txt").unwrap())
[INFO] [stderr] 45 | |             .split(b',').map(|b| String::from_utf8_lossy(&b.unwrap()).into()).collect();
[INFO] [stderr] 46 | |         for ascii_lowercase in b'a'..b'z' { stop_words.insert((ascii_lowercase as char).to_string()); }
[INFO] [stderr] ...  |
[INFO] [stderr] 58 | |         }
[INFO] [stderr] 59 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |       /// Creates a list of pairs associating words with frequencies
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 62 | /     let frequencies = || {
[INFO] [stderr] 63 | |         let mut word_freqs_mut = word_freqs.borrow_mut();
[INFO] [stderr] 64 | |         for w in words.borrow().iter() {
[INFO] [stderr] 65 | |             if let Some(index) = word_freqs_mut.iter().position(|pair| &pair.0 == w) {
[INFO] [stderr] ...  |
[INFO] [stderr] 70 | |         }
[INFO] [stderr] 71 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |       /// Sorts word_freqs by frequency
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 74 | /     let sort = || {
[INFO] [stderr] 75 | |         word_freqs.borrow_mut().sort_by_key(|p| 0 - p.1);
[INFO] [stderr] 76 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     /// Takes a path to a file and assigns the entire
[INFO] [stderr] 17 | |     /// contents of the file to the global variable data
[INFO] [stderr]    | |________________________________________________________^
[INFO] [stderr] 18 | /     let read_file = |filename: &str| {
[INFO] [stderr] 19 | |         let mut text = String::new();
[INFO] [stderr] 20 | |         File::open(filename).unwrap().read_to_string(&mut text).unwrap();
[INFO] [stderr] 21 | |         data.borrow_mut().append(&mut text.chars().collect());
[INFO] [stderr] 22 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |       /// Replaces all nonalphanumeric chars in data with white space
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 26 | /     let filter_chars_and_normalize = || {
[INFO] [stderr] 27 | |         for c in data.borrow_mut().iter_mut() {
[INFO] [stderr] 28 | |             if !c.is_alphanumeric() {
[INFO] [stderr] 29 | |                 *c = ' ';
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |         }
[INFO] [stderr] 34 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |       /// Scans data for words, filling the global variable words
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 37 | /     let scan = || {
[INFO] [stderr] 38 | |         let data_str: String = data.borrow().iter().collect();
[INFO] [stderr] 39 | |         words.borrow_mut().append(&mut data_str.split(' ').map(|s| s.to_string()).filter(|s| !s.is_empty()).collect());
[INFO] [stderr] 40 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |       /// Scans data for words, filling the global variable words
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 43 | /     let remove_stop_words = || {
[INFO] [stderr] 44 | |         let mut stop_words: HashSet<String> = BufReader::new(File::open("test-data/stop_words.txt").unwrap())
[INFO] [stderr] 45 | |             .split(b',').map(|b| String::from_utf8_lossy(&b.unwrap()).into()).collect();
[INFO] [stderr] 46 | |         for ascii_lowercase in b'a'..b'z' { stop_words.insert((ascii_lowercase as char).to_string()); }
[INFO] [stderr] ...  |
[INFO] [stderr] 58 | |         }
[INFO] [stderr] 59 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |       /// Creates a list of pairs associating words with frequencies
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 62 | /     let frequencies = || {
[INFO] [stderr] 63 | |         let mut word_freqs_mut = word_freqs.borrow_mut();
[INFO] [stderr] 64 | |         for w in words.borrow().iter() {
[INFO] [stderr] 65 | |             if let Some(index) = word_freqs_mut.iter().position(|pair| &pair.0 == w) {
[INFO] [stderr] ...  |
[INFO] [stderr] 70 | |         }
[INFO] [stderr] 71 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/bin/04-cookbook.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |       /// Sorts word_freqs by frequency
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 74 | /     let sort = || {
[INFO] [stderr] 75 | |         word_freqs.borrow_mut().sort_by_key(|p| 0 - p.1);
[INFO] [stderr] 76 | |     };
[INFO] [stderr]    | |______- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `"docker" "inspect" "60476eb2602d388f4d42a0e52fa6cb56b07b598d1ce5de5fcf06067db2f2cc2c"`
[INFO] running `"docker" "rm" "-f" "60476eb2602d388f4d42a0e52fa6cb56b07b598d1ce5de5fcf06067db2f2cc2c"`
[INFO] [stdout] 60476eb2602d388f4d42a0e52fa6cb56b07b598d1ce5de5fcf06067db2f2cc2c