[INFO] updating cached repository tbelaire/dailyprogrammer_challenge247_easy_secret_santa
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tbelaire/dailyprogrammer_challenge247_easy_secret_santa
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa" "work/ex/beta-1.37-6/sources/1.36.0/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 711646bcb7d841928c02268d3ca07747db13c311
[INFO] sha for GitHub repo tbelaire/dailyprogrammer_challenge247_easy_secret_santa: 711646bcb7d841928c02268d3ca07747db13c311
[INFO] validating manifest of tbelaire/dailyprogrammer_challenge247_easy_secret_santa on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tbelaire/dailyprogrammer_challenge247_easy_secret_santa on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tbelaire/dailyprogrammer_challenge247_easy_secret_santa
[INFO] finished frobbing tbelaire/dailyprogrammer_challenge247_easy_secret_santa
[INFO] frobbed toml for tbelaire/dailyprogrammer_challenge247_easy_secret_santa written to work/ex/beta-1.37-6/sources/1.36.0/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa/Cargo.toml
[INFO] started frobbing tbelaire/dailyprogrammer_challenge247_easy_secret_santa
[INFO] finished frobbing tbelaire/dailyprogrammer_challenge247_easy_secret_santa
[INFO] frobbed toml for tbelaire/dailyprogrammer_challenge247_easy_secret_santa written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa/Cargo.toml
[INFO] crate tbelaire/dailyprogrammer_challenge247_easy_secret_santa already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tbelaire/dailyprogrammer_challenge247_easy_secret_santa against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 75fe57a5384304822ea88ede3a4a9d1fe27401299d5a30df4c97a622b8353f3a
[INFO] running `"docker" "start" "-a" "75fe57a5384304822ea88ede3a4a9d1fe27401299d5a30df4c97a622b8353f3a"`
[INFO] [stderr]    Compiling challenge_247_easy_secret_santa v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new<T>(people: Vec<T>) -> Self
[INFO] [stderr] 18 | |         where T: Into<String>
[INFO] [stderr] 19 | |     {
[INFO] [stderr] 20 | |         Family {
[INFO] [stderr] ...  |
[INFO] [stderr] 23 | |         }
[INFO] [stderr] 24 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new2`
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | /     pub fn new2<V, T>(people: V) -> Self
[INFO] [stderr] 26 | |         where V: Into<Vec<T>>,
[INFO] [stderr] 27 | |               T: Into<String>
[INFO] [stderr] 28 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 32 | |         }
[INFO] [stderr] 33 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "75fe57a5384304822ea88ede3a4a9d1fe27401299d5a30df4c97a622b8353f3a"`
[INFO] running `"docker" "rm" "-f" "75fe57a5384304822ea88ede3a4a9d1fe27401299d5a30df4c97a622b8353f3a"`
[INFO] [stdout] 75fe57a5384304822ea88ede3a4a9d1fe27401299d5a30df4c97a622b8353f3a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 94c387d4108d0e22395b20b357a39853fec37e7531d4dd52392f9ae75fdb0108
[INFO] running `"docker" "start" "-a" "94c387d4108d0e22395b20b357a39853fec37e7531d4dd52392f9ae75fdb0108"`
[INFO] [stderr]    Compiling challenge_247_easy_secret_santa v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "94c387d4108d0e22395b20b357a39853fec37e7531d4dd52392f9ae75fdb0108"`
[INFO] running `"docker" "rm" "-f" "94c387d4108d0e22395b20b357a39853fec37e7531d4dd52392f9ae75fdb0108"`
[INFO] [stdout] 94c387d4108d0e22395b20b357a39853fec37e7531d4dd52392f9ae75fdb0108
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tbelaire/dailyprogrammer_challenge247_easy_secret_santa:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 9763d788b351d73246ec0533d5066f9ed161cdd49c5a265006ff1256282abd19
[INFO] running `"docker" "start" "-a" "9763d788b351d73246ec0533d5066f9ed161cdd49c5a265006ff1256282abd19"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/challenge_247_easy_secret_santa-0aeddae5c603b6ba
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_family_constructor ... ok
[INFO] [stdout] test test_infeasible ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "9763d788b351d73246ec0533d5066f9ed161cdd49c5a265006ff1256282abd19"`
[INFO] running `"docker" "rm" "-f" "9763d788b351d73246ec0533d5066f9ed161cdd49c5a265006ff1256282abd19"`
[INFO] [stdout] 9763d788b351d73246ec0533d5066f9ed161cdd49c5a265006ff1256282abd19