[INFO] cloning repository https://github.com/Suibeom/SudokuThings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Suibeom/SudokuThings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuibeom%2FSudokuThings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuibeom%2FSudokuThings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a948f7d9eb5a5b6c2932bcf1bad74b7be26c078
[INFO] testing Suibeom/SudokuThings against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuibeom%2FSudokuThings" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Suibeom/SudokuThings on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Suibeom/SudokuThings
[INFO] finished tweaking git repo https://github.com/Suibeom/SudokuThings
[INFO] tweaked toml for git repo https://github.com/Suibeom/SudokuThings written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Suibeom/SudokuThings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] acf3092451e7a75d0446cfa02218c4813f2221219e7369b00cd98ad63cbdd86c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "acf3092451e7a75d0446cfa02218c4813f2221219e7369b00cd98ad63cbdd86c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acf3092451e7a75d0446cfa02218c4813f2221219e7369b00cd98ad63cbdd86c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acf3092451e7a75d0446cfa02218c4813f2221219e7369b00cd98ad63cbdd86c", kill_on_drop: false }`
[INFO] [stdout] acf3092451e7a75d0446cfa02218c4813f2221219e7369b00cd98ad63cbdd86c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bdf70f8a009203054d46b82e860600aa75fb8a53ebd46768904c0b5903c5e719
[INFO] running `Command { std: "docker" "start" "-a" "bdf70f8a009203054d46b82e860600aa75fb8a53ebd46768904c0b5903c5e719", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling net2 v0.2.34
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.2.1
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling tokio v0.2.22
[INFO] [stderr]    Compiling pin-project v0.4.23
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.6
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling hyper v0.13.7
[INFO] [stderr]    Compiling sudokuthings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `get_box_index`
[INFO] [stdout]    --> src/board.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn get_box_index(idx: usize) -> u8 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pencil_out`
[INFO] [stdout]    --> src/board.rs:138:8
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn pencil_out(&self, idx: usize, pencilmarks: &HashSet<u8>) -> Board {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `place`
[INFO] [stdout]    --> src/board.rs:155:8
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn place(&self, idx: usize, digit: u8) -> Board {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `place_derived_pencilmarks`
[INFO] [stdout]    --> src/board.rs:427:4
[INFO] [stdout]     |
[INFO] [stdout] 427 | fn place_derived_pencilmarks(board: Board, current_box: &SudokuBox) -> Board {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `resolve_subset_pencilmarks`
[INFO] [stdout]    --> src/board.rs:507:4
[INFO] [stdout]     |
[INFO] [stdout] 507 | fn resolve_subset_pencilmarks(board: Board, current_box: &SudokuBox) -> Board {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hello_world`
[INFO] [stdout]  --> src/server.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | async fn hello_world(_req: Request<Body>) -> Result<Response<Body>, Infallible> {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `Command { std: "docker" "inspect" "bdf70f8a009203054d46b82e860600aa75fb8a53ebd46768904c0b5903c5e719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdf70f8a009203054d46b82e860600aa75fb8a53ebd46768904c0b5903c5e719", kill_on_drop: false }`
[INFO] [stdout] bdf70f8a009203054d46b82e860600aa75fb8a53ebd46768904c0b5903c5e719
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 991d9b8f424999078f15fb99077aa47efc4c28453f592ffef85158d18a9066c1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "991d9b8f424999078f15fb99077aa47efc4c28453f592ffef85158d18a9066c1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudokuthings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `get_box_index`
[INFO] [stdout]    --> src/board.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn get_box_index(idx: usize) -> u8 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pencil_out`
[INFO] [stdout]    --> src/board.rs:138:8
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn pencil_out(&self, idx: usize, pencilmarks: &HashSet<u8>) -> Board {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `place`
[INFO] [stdout]    --> src/board.rs:155:8
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn place(&self, idx: usize, digit: u8) -> Board {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `place_derived_pencilmarks`
[INFO] [stdout]    --> src/board.rs:427:4
[INFO] [stdout]     |
[INFO] [stdout] 427 | fn place_derived_pencilmarks(board: Board, current_box: &SudokuBox) -> Board {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `resolve_subset_pencilmarks`
[INFO] [stdout]    --> src/board.rs:507:4
[INFO] [stdout]     |
[INFO] [stdout] 507 | fn resolve_subset_pencilmarks(board: Board, current_box: &SudokuBox) -> Board {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hello_world`
[INFO] [stdout]  --> src/server.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | async fn hello_world(_req: Request<Body>) -> Result<Response<Body>, Infallible> {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 23.87s
[INFO] running `Command { std: "docker" "inspect" "991d9b8f424999078f15fb99077aa47efc4c28453f592ffef85158d18a9066c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "991d9b8f424999078f15fb99077aa47efc4c28453f592ffef85158d18a9066c1", kill_on_drop: false }`
[INFO] [stdout] 991d9b8f424999078f15fb99077aa47efc4c28453f592ffef85158d18a9066c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6ad1d6d2906e8b7a42ccfa2df7a3a1ccfbada33dfd6df22b96971f6eab5cfd0d
[INFO] running `Command { std: "docker" "start" "-a" "6ad1d6d2906e8b7a42ccfa2df7a3a1ccfbada33dfd6df22b96971f6eab5cfd0d", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `get_box_index`
[INFO] [stderr]    --> src/board.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn get_box_index(idx: usize) -> u8 {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pencil_out`
[INFO] [stderr]    --> src/board.rs:138:8
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn pencil_out(&self, idx: usize, pencilmarks: &HashSet<u8>) -> Board {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `place`
[INFO] [stderr]    --> src/board.rs:155:8
[INFO] [stderr]     |
[INFO] [stderr] 155 |     fn place(&self, idx: usize, digit: u8) -> Board {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `place_derived_pencilmarks`
[INFO] [stderr]    --> src/board.rs:427:4
[INFO] [stderr]     |
[INFO] [stderr] 427 | fn place_derived_pencilmarks(board: Board, current_box: &SudokuBox) -> Board {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `resolve_subset_pencilmarks`
[INFO] [stderr]    --> src/board.rs:507:4
[INFO] [stderr]     |
[INFO] [stderr] 507 | fn resolve_subset_pencilmarks(board: Board, current_box: &SudokuBox) -> Board {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello_world`
[INFO] [stderr]  --> src/server.rs:7:10
[INFO] [stderr]   |
[INFO] [stderr] 7 | async fn hello_world(_req: Request<Body>) -> Result<Response<Body>, Infallible> {
[INFO] [stderr]   |          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudokuthings` (bin "sudokuthings" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudokuthings-f96a5fbbb76152a8)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test board::tests::test_things ... ok
[INFO] [stdout] test board::tests::test_idx ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ad1d6d2906e8b7a42ccfa2df7a3a1ccfbada33dfd6df22b96971f6eab5cfd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ad1d6d2906e8b7a42ccfa2df7a3a1ccfbada33dfd6df22b96971f6eab5cfd0d", kill_on_drop: false }`
[INFO] [stdout] 6ad1d6d2906e8b7a42ccfa2df7a3a1ccfbada33dfd6df22b96971f6eab5cfd0d