[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] checking Suibeom/SudokuThings against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuibeom%2FSudokuThings" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Suibeom/SudokuThings on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-9/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61aee0f8bbf19522df972d11168038dab86e46fbc662fcb2e277668788647e6e
[INFO] running `Command { std: "docker" "start" "-a" "61aee0f8bbf19522df972d11168038dab86e46fbc662fcb2e277668788647e6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61aee0f8bbf19522df972d11168038dab86e46fbc662fcb2e277668788647e6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61aee0f8bbf19522df972d11168038dab86e46fbc662fcb2e277668788647e6e", kill_on_drop: false }`
[INFO] [stdout] 61aee0f8bbf19522df972d11168038dab86e46fbc662fcb2e277668788647e6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 755b9dd1b219b0f0902f5e7618bd5c23c310da1894f30b976f08d2a7eb40baaf
[INFO] running `Command { std: "docker" "start" "-a" "755b9dd1b219b0f0902f5e7618bd5c23c310da1894f30b976f08d2a7eb40baaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]     Checking tracing-core v0.1.15
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]     Checking 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: 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] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 57s
[INFO] running `Command { std: "docker" "inspect" "755b9dd1b219b0f0902f5e7618bd5c23c310da1894f30b976f08d2a7eb40baaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "755b9dd1b219b0f0902f5e7618bd5c23c310da1894f30b976f08d2a7eb40baaf", kill_on_drop: false }`
[INFO] [stdout] 755b9dd1b219b0f0902f5e7618bd5c23c310da1894f30b976f08d2a7eb40baaf