[INFO] updating cached repository rcoverick/rust_dailyprogrammer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rcoverick/rust_dailyprogrammer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rcoverick/rust_dailyprogrammer" "work/ex/beta-1.38-1/sources/1.37.0/gh/rcoverick/rust_dailyprogrammer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rcoverick/rust_dailyprogrammer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rcoverick/rust_dailyprogrammer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rcoverick/rust_dailyprogrammer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rcoverick/rust_dailyprogrammer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7eba5007eb1ec145617b2771d020da0663dd7473
[INFO] sha for GitHub repo rcoverick/rust_dailyprogrammer: 7eba5007eb1ec145617b2771d020da0663dd7473
[INFO] validating manifest of rcoverick/rust_dailyprogrammer 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 rcoverick/rust_dailyprogrammer 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 rcoverick/rust_dailyprogrammer
[INFO] finished frobbing rcoverick/rust_dailyprogrammer
[INFO] frobbed toml for rcoverick/rust_dailyprogrammer written to work/ex/beta-1.38-1/sources/1.37.0/gh/rcoverick/rust_dailyprogrammer/Cargo.toml
[INFO] started frobbing rcoverick/rust_dailyprogrammer
[INFO] finished frobbing rcoverick/rust_dailyprogrammer
[INFO] frobbed toml for rcoverick/rust_dailyprogrammer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rcoverick/rust_dailyprogrammer/Cargo.toml
[INFO] crate rcoverick/rust_dailyprogrammer 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 rcoverick/rust_dailyprogrammer 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-6/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/rcoverick/rust_dailyprogrammer:/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] 02a25ca02ae9be77aef76a5e825a99658bb1340aecb7d869488bc85b7ac183f0
[INFO] running `"docker" "start" "-a" "02a25ca02ae9be77aef76a5e825a99658bb1340aecb7d869488bc85b7ac183f0"`
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling dailyprogrammer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/challenge/easy/pandigital_roman_numbers.rs:3:5
[INFO] [stderr]    |
[INFO] [stderr] 3  | /     ///Numerals need to be in order. Each pair of numerals can be swapped to form a different number. 
[INFO] [stderr] 4  | |     ///M+(DC or CD)+(LX or XL)+(VI or IV) = a pandigital roman numeral with all of the numerals exactly once  
[INFO] [stderr]    | |______________________________________________________________________________________________________________^
[INFO] [stderr] 5  | /     for m in [1000].into_iter(){
[INFO] [stderr] 6  | |         for cd in [400, 600].into_iter(){
[INFO] [stderr] 7  | |             for xl in [40,60].into_iter(){
[INFO] [stderr] 8  | |                 for  iv in [4,6].into_iter(){
[INFO] [stderr] ...  |
[INFO] [stderr] 12 | |         }
[INFO] [stderr] 13 | |     }
[INFO] [stderr]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]   --> src/challenge/intermediate/pgm_manipulation.rs:20:32
[INFO] [stderr]    |
[INFO] [stderr] 20 |     io::stdin().read_to_string((&mut buf)).unwrap();
[INFO] [stderr]    |                                ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/challenge/intermediate/pgm_manipulation.rs:38:41
[INFO] [stderr]    |
[INFO] [stderr] 38 |     res.chunks_mut(width as usize).map(|mut x| x.reverse()).count();
[INFO] [stderr]    |                                         ----^
[INFO] [stderr]    |                                         |
[INFO] [stderr]    |                                         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.42s
[INFO] running `"docker" "inspect" "02a25ca02ae9be77aef76a5e825a99658bb1340aecb7d869488bc85b7ac183f0"`
[INFO] running `"docker" "rm" "-f" "02a25ca02ae9be77aef76a5e825a99658bb1340aecb7d869488bc85b7ac183f0"`
[INFO] [stdout] 02a25ca02ae9be77aef76a5e825a99658bb1340aecb7d869488bc85b7ac183f0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/rcoverick/rust_dailyprogrammer:/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] 467212b229afa300159ace243af776c3a23b4d14b16edfc805594d931dc10489
[INFO] running `"docker" "start" "-a" "467212b229afa300159ace243af776c3a23b4d14b16edfc805594d931dc10489"`
[INFO] [stderr]    Compiling dailyprogrammer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/challenge/easy/pandigital_roman_numbers.rs:3:5
[INFO] [stderr]    |
[INFO] [stderr] 3  | /     ///Numerals need to be in order. Each pair of numerals can be swapped to form a different number. 
[INFO] [stderr] 4  | |     ///M+(DC or CD)+(LX or XL)+(VI or IV) = a pandigital roman numeral with all of the numerals exactly once  
[INFO] [stderr]    | |______________________________________________________________________________________________________________^
[INFO] [stderr] 5  | /     for m in [1000].into_iter(){
[INFO] [stderr] 6  | |         for cd in [400, 600].into_iter(){
[INFO] [stderr] 7  | |             for xl in [40,60].into_iter(){
[INFO] [stderr] 8  | |                 for  iv in [4,6].into_iter(){
[INFO] [stderr] ...  |
[INFO] [stderr] 12 | |         }
[INFO] [stderr] 13 | |     }
[INFO] [stderr]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]   --> src/challenge/intermediate/pgm_manipulation.rs:20:32
[INFO] [stderr]    |
[INFO] [stderr] 20 |     io::stdin().read_to_string((&mut buf)).unwrap();
[INFO] [stderr]    |                                ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/challenge/intermediate/pgm_manipulation.rs:38:41
[INFO] [stderr]    |
[INFO] [stderr] 38 |     res.chunks_mut(width as usize).map(|mut x| x.reverse()).count();
[INFO] [stderr]    |                                         ----^
[INFO] [stderr]    |                                         |
[INFO] [stderr]    |                                         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.47s
[INFO] running `"docker" "inspect" "467212b229afa300159ace243af776c3a23b4d14b16edfc805594d931dc10489"`
[INFO] running `"docker" "rm" "-f" "467212b229afa300159ace243af776c3a23b4d14b16edfc805594d931dc10489"`
[INFO] [stdout] 467212b229afa300159ace243af776c3a23b4d14b16edfc805594d931dc10489
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/rcoverick/rust_dailyprogrammer:/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] c70df0de7e00fc75feb0bd4ba74d49e4f3f544c86e2a28a7a9bedda12818af7f
[INFO] running `"docker" "start" "-a" "c70df0de7e00fc75feb0bd4ba74d49e4f3f544c86e2a28a7a9bedda12818af7f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/dailyprogrammer-ad80c709eb2ccb2f
[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] [stderr]      Running /opt/crater/target/debug/deps/dailyprogrammer-aae3e55d46162370
[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] [stderr]    Doc-tests dailyprogrammer
[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" "c70df0de7e00fc75feb0bd4ba74d49e4f3f544c86e2a28a7a9bedda12818af7f"`
[INFO] running `"docker" "rm" "-f" "c70df0de7e00fc75feb0bd4ba74d49e4f3f544c86e2a28a7a9bedda12818af7f"`
[INFO] [stdout] c70df0de7e00fc75feb0bd4ba74d49e4f3f544c86e2a28a7a9bedda12818af7f