[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/beta-1.38-1/sources/1.37.0/gh/shybyte/exercises-in-programming-style-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/gh/shybyte/exercises-in-programming-style-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of shybyte/exercises-in-programming-style-rust on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/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/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing shybyte/exercises-in-programming-style-rust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shybyte/exercises-in-programming-style-rust:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5a8de07b29c5a9f19badc9fea579e8bd2b8cfc98c12c4b95d7b3d6236a1ac11c
[INFO] running `"docker" "start" "-a" "5a8de07b29c5a9f19badc9fea579e8bd2b8cfc98c12c4b95d7b3d6236a1ac11c"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 11.04s
[INFO] running `"docker" "inspect" "5a8de07b29c5a9f19badc9fea579e8bd2b8cfc98c12c4b95d7b3d6236a1ac11c"`
[INFO] running `"docker" "rm" "-f" "5a8de07b29c5a9f19badc9fea579e8bd2b8cfc98c12c4b95d7b3d6236a1ac11c"`
[INFO] [stdout] 5a8de07b29c5a9f19badc9fea579e8bd2b8cfc98c12c4b95d7b3d6236a1ac11c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shybyte/exercises-in-programming-style-rust:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 69c99319a0762d45bc70e83cf4cf794ccf00464dc01d0cc1e0356a87d63ad938
[INFO] running `"docker" "start" "-a" "69c99319a0762d45bc70e83cf4cf794ccf00464dc01d0cc1e0356a87d63ad938"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 4.18s
[INFO] running `"docker" "inspect" "69c99319a0762d45bc70e83cf4cf794ccf00464dc01d0cc1e0356a87d63ad938"`
[INFO] running `"docker" "rm" "-f" "69c99319a0762d45bc70e83cf4cf794ccf00464dc01d0cc1e0356a87d63ad938"`
[INFO] [stdout] 69c99319a0762d45bc70e83cf4cf794ccf00464dc01d0cc1e0356a87d63ad938
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shybyte/exercises-in-programming-style-rust:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] f16baa1a7db26a7b73ceed9e376ea4abfa5e30827732e0fb3b720b63b284582c
[INFO] running `"docker" "start" "-a" "f16baa1a7db26a7b73ceed9e376ea4abfa5e30827732e0fb3b720b63b284582c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/03_monolith-9d63018f0844ba3b
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/04_cookbook-1d7678c698c07bb7
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/05_pipeline-2c1341380fd056dc
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/06_code_golf-47fc5bf8213049d9
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/07_infinite_mirror-059b02b1ab638668
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/09_the_one-584c6f7e61034110
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/10_things-39aaa32587f0bd8c
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/42_rusty-2460a440c8042bff
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exercises_in_programming_style_rust-a0b357a6a4e8c4ef
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f16baa1a7db26a7b73ceed9e376ea4abfa5e30827732e0fb3b720b63b284582c"`
[INFO] running `"docker" "rm" "-f" "f16baa1a7db26a7b73ceed9e376ea4abfa5e30827732e0fb3b720b63b284582c"`
[INFO] [stdout] f16baa1a7db26a7b73ceed9e376ea4abfa5e30827732e0fb3b720b63b284582c