[INFO] cloning repository https://github.com/agmcleod/adventofcode-2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/agmcleod/adventofcode-2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagmcleod%2Fadventofcode-2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagmcleod%2Fadventofcode-2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3cf69dd09a1f1066b8d3f1efb05db0cdfc5b97db
[INFO] testing agmcleod/adventofcode-2020 against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagmcleod%2Fadventofcode-2020" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/agmcleod/adventofcode-2020 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/agmcleod/adventofcode-2020
[INFO] finished tweaking git repo https://github.com/agmcleod/adventofcode-2020
[INFO] tweaked toml for git repo https://github.com/agmcleod/adventofcode-2020 written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/agmcleod/adventofcode-2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17aa1b7e4089295ffc8315265d0c9c4ddd67e9e9b8836d07ef381a9d43c4ad45
[INFO] running `Command { std: "docker" "start" "-a" "17aa1b7e4089295ffc8315265d0c9c4ddd67e9e9b8836d07ef381a9d43c4ad45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17aa1b7e4089295ffc8315265d0c9c4ddd67e9e9b8836d07ef381a9d43c4ad45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17aa1b7e4089295ffc8315265d0c9c4ddd67e9e9b8836d07ef381a9d43c4ad45", kill_on_drop: false }`
[INFO] [stdout] 17aa1b7e4089295ffc8315265d0c9c4ddd67e9e9b8836d07ef381a9d43c4ad45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f147d0c8c3cfa3aba6cb1af2d5c05e08daa8f64c4f7c77183d2a738b05d6a8c6
[INFO] running `Command { std: "docker" "start" "-a" "f147d0c8c3cfa3aba6cb1af2d5c05e08daa8f64c4f7c77183d2a738b05d6a8c6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling read_input v0.1.0 (/opt/rustwide/workdir/read_input)
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling fifteen v0.1.0 (/opt/rustwide/workdir/15)
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> read_input/src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     try!(file.read_to_string(&mut text));
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> read_input/src/lib.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut file = try!(File::open(path));
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling eleven v0.1.0 (/opt/rustwide/workdir/11)
[INFO] [stderr]    Compiling fourteen v0.1.0 (/opt/rustwide/workdir/14)
[INFO] [stderr]    Compiling seventeen v0.1.0 (/opt/rustwide/workdir/17)
[INFO] [stderr]    Compiling two v0.1.0 (/opt/rustwide/workdir/2)
[INFO] [stderr]    Compiling twenty v0.1.0 (/opt/rustwide/workdir/20)
[INFO] [stderr]    Compiling ten v0.1.0 (/opt/rustwide/workdir/10)
[INFO] [stderr]    Compiling six v0.1.0 (/opt/rustwide/workdir/6)
[INFO] [stderr]    Compiling thirteen v0.1.0 (/opt/rustwide/workdir/13)
[INFO] [stderr]    Compiling five v0.1.0 (/opt/rustwide/workdir/5)
[INFO] [stderr]    Compiling seven v0.1.0 (/opt/rustwide/workdir/7)
[INFO] [stderr]    Compiling three v0.1.0 (/opt/rustwide/workdir/3)
[INFO] [stderr]    Compiling eight v0.1.0 (/opt/rustwide/workdir/8)
[INFO] [stderr]    Compiling twelve v0.1.0 (/opt/rustwide/workdir/12)
[INFO] [stderr]    Compiling sixteen v0.1.0 (/opt/rustwide/workdir/16)
[INFO] [stderr]    Compiling one v0.1.0 (/opt/rustwide/workdir/1)
[INFO] [stderr]    Compiling nine v0.1.0 (/opt/rustwide/workdir/9)
[INFO] [stdout] warning: field is never read: `tile_id`
[INFO] [stdout]   --> 20/src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     tile_id: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `side`
[INFO] [stdout]   --> 20/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     side: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tile_id`
[INFO] [stdout]   --> 20/src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     tile_id: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tiles`
[INFO] [stdout]   --> 20/src/main.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     tiles: Vec<Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tile_connections`
[INFO] [stdout]   --> 20/src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     tile_connections: HashMap<String, Vec<Connection>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling eighteen v0.1.0 (/opt/rustwide/workdir/18)
[INFO] [stderr]    Compiling nineteen v0.1.0 (/opt/rustwide/workdir/19)
[INFO] [stderr]    Compiling four v0.1.0 (/opt/rustwide/workdir/4)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.42s
[INFO] running `Command { std: "docker" "inspect" "f147d0c8c3cfa3aba6cb1af2d5c05e08daa8f64c4f7c77183d2a738b05d6a8c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f147d0c8c3cfa3aba6cb1af2d5c05e08daa8f64c4f7c77183d2a738b05d6a8c6", kill_on_drop: false }`
[INFO] [stdout] f147d0c8c3cfa3aba6cb1af2d5c05e08daa8f64c4f7c77183d2a738b05d6a8c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fc39dde9dc823e88423d775fff62f837bc2424cb9912a0ef69df6086a7b4585
[INFO] running `Command { std: "docker" "start" "-a" "6fc39dde9dc823e88423d775fff62f837bc2424cb9912a0ef69df6086a7b4585", kill_on_drop: false }`
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> read_input/src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     try!(file.read_to_string(&mut text));
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling fifteen v0.1.0 (/opt/rustwide/workdir/15)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> read_input/src/lib.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut file = try!(File::open(path));
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling read_input v0.1.0 (/opt/rustwide/workdir/read_input)
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling six v0.1.0 (/opt/rustwide/workdir/6)
[INFO] [stderr]    Compiling five v0.1.0 (/opt/rustwide/workdir/5)
[INFO] [stderr]    Compiling thirteen v0.1.0 (/opt/rustwide/workdir/13)
[INFO] [stderr]    Compiling one v0.1.0 (/opt/rustwide/workdir/1)
[INFO] [stderr]    Compiling two v0.1.0 (/opt/rustwide/workdir/2)
[INFO] [stderr]    Compiling twelve v0.1.0 (/opt/rustwide/workdir/12)
[INFO] [stderr]    Compiling seven v0.1.0 (/opt/rustwide/workdir/7)
[INFO] [stderr]    Compiling eleven v0.1.0 (/opt/rustwide/workdir/11)
[INFO] [stderr]    Compiling twenty v0.1.0 (/opt/rustwide/workdir/20)
[INFO] [stderr]    Compiling ten v0.1.0 (/opt/rustwide/workdir/10)
[INFO] [stderr]    Compiling sixteen v0.1.0 (/opt/rustwide/workdir/16)
[INFO] [stderr]    Compiling nine v0.1.0 (/opt/rustwide/workdir/9)
[INFO] [stderr]    Compiling three v0.1.0 (/opt/rustwide/workdir/3)
[INFO] [stderr]    Compiling fourteen v0.1.0 (/opt/rustwide/workdir/14)
[INFO] [stderr]    Compiling eight v0.1.0 (/opt/rustwide/workdir/8)
[INFO] [stderr]    Compiling seventeen v0.1.0 (/opt/rustwide/workdir/17)
[INFO] [stderr]    Compiling four v0.1.0 (/opt/rustwide/workdir/4)
[INFO] [stderr]    Compiling eighteen v0.1.0 (/opt/rustwide/workdir/18)
[INFO] [stderr]    Compiling nineteen v0.1.0 (/opt/rustwide/workdir/19)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> read_input/src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     try!(file.read_to_string(&mut text));
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> read_input/src/lib.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut file = try!(File::open(path));
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tile_id`
[INFO] [stdout]   --> 20/src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     tile_id: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `side`
[INFO] [stdout]   --> 20/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     side: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tile_id`
[INFO] [stdout]   --> 20/src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     tile_id: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tiles`
[INFO] [stdout]   --> 20/src/main.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     tiles: Vec<Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tile_connections`
[INFO] [stdout]   --> 20/src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     tile_connections: HashMap<String, Vec<Connection>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.52s
[INFO] running `Command { std: "docker" "inspect" "6fc39dde9dc823e88423d775fff62f837bc2424cb9912a0ef69df6086a7b4585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fc39dde9dc823e88423d775fff62f837bc2424cb9912a0ef69df6086a7b4585", kill_on_drop: false }`
[INFO] [stdout] 6fc39dde9dc823e88423d775fff62f837bc2424cb9912a0ef69df6086a7b4585
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6c0895c47fa3b9e47df0e06fce91e2bf2b76a7e826a8d527d05852acdf6cb2a5
[INFO] running `Command { std: "docker" "start" "-a" "6c0895c47fa3b9e47df0e06fce91e2bf2b76a7e826a8d527d05852acdf6cb2a5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]  --> read_input/src/lib.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     try!(file.read_to_string(&mut text));
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]  --> read_input/src/lib.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut file = try!(File::open(path));
[INFO] [stderr]   |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `read_input` (lib) generated 2 warnings
[INFO] [stderr] warning: `read_input` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr] warning: field is never read: `tile_id`
[INFO] [stderr]   --> 20/src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     tile_id: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `side`
[INFO] [stderr]   --> 20/src/main.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     side: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `tile_id`
[INFO] [stderr]   --> 20/src/main.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     tile_id: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `tiles`
[INFO] [stderr]   --> 20/src/main.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     tiles: Vec<Tile>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `tile_connections`
[INFO] [stderr]   --> 20/src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     tile_connections: HashMap<String, Vec<Connection>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `twenty` (bin "twenty" test) generated 5 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.72s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/eight-4f25bef641714ec7)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/eighteen-33bba8577b926fbb)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_multiply_p2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/eleven-d88fe63741cd5dcf)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_p2_neighbour_counts ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/fifteen-227df76ba61fa56d)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/five-2d5e69c15b97bc7d)
[INFO] [stdout] running 0 tests
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[INFO] running `Command { std: "docker" "inspect" "6c0895c47fa3b9e47df0e06fce91e2bf2b76a7e826a8d527d05852acdf6cb2a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c0895c47fa3b9e47df0e06fce91e2bf2b76a7e826a8d527d05852acdf6cb2a5", kill_on_drop: false }`
[INFO] [stdout] 6c0895c47fa3b9e47df0e06fce91e2bf2b76a7e826a8d527d05852acdf6cb2a5