[INFO] cloning repository https://github.com/collivie/rusty_mahjong
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/collivie/rusty_mahjong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcollivie%2Frusty_mahjong", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcollivie%2Frusty_mahjong'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9447a85cd35634123bf9250d371ae1a2bd378966
[INFO] checking collivie/rusty_mahjong against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcollivie%2Frusty_mahjong" "/workspace/builds/worker-55/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-55/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/collivie/rusty_mahjong 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/collivie/rusty_mahjong
[INFO] finished tweaking git repo https://github.com/collivie/rusty_mahjong
[INFO] tweaked toml for git repo https://github.com/collivie/rusty_mahjong written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] crate git repo https://github.com/collivie/rusty_mahjong 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] bf9fc9d486e58bd64669f1edc53ec5a21f433c5738b5f061b10f07ea836f8f7c
[INFO] running `Command { std: "docker" "start" "-a" "bf9fc9d486e58bd64669f1edc53ec5a21f433c5738b5f061b10f07ea836f8f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf9fc9d486e58bd64669f1edc53ec5a21f433c5738b5f061b10f07ea836f8f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf9fc9d486e58bd64669f1edc53ec5a21f433c5738b5f061b10f07ea836f8f7c", kill_on_drop: false }`
[INFO] [stdout] bf9fc9d486e58bd64669f1edc53ec5a21f433c5738b5f061b10f07ea836f8f7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] 9e51c93079a39dd4f976c32b7366ab1c5b6b6bdb01ec8ddbe2ec2b4be646910e
[INFO] running `Command { std: "docker" "start" "-a" "9e51c93079a39dd4f976c32b7366ab1c5b6b6bdb01ec8ddbe2ec2b4be646910e", kill_on_drop: false }`
[INFO] [stderr]     Checking rusty_mahjong v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `ExtractionFunction`
[INFO] [stdout]   --> src/hand/hand_arrangement.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | type ExtractionFunction = fn(&HandArrangement, tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)>;
[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: `consume`
[INFO] [stdout]   --> src/hand/hand_arrangement.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn consume(&self, hidden_tiles : &Vec<Tile>) -> Vec<HandArrangement> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract`
[INFO] [stdout]   --> src/hand/hand_arrangement.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn extract(
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_pon`
[INFO] [stdout]   --> src/hand/hand_arrangement.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn extract_pon(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_pair`
[INFO] [stdout]    --> src/hand/hand_arrangement.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn extract_pair(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_chii`
[INFO] [stdout]    --> src/hand/hand_arrangement.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn extract_chii(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_pon_wait`
[INFO] [stdout]    --> src/hand/hand_arrangement.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn extract_pon_wait(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_pair_wait`
[INFO] [stdout]    --> src/hand/hand_arrangement.rs:212:8
[INFO] [stdout]     |
[INFO] [stdout] 212 |     fn extract_pair_wait(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_chii_side_wait`
[INFO] [stdout]    --> src/hand/hand_arrangement.rs:234:8
[INFO] [stdout]     |
[INFO] [stdout] 234 |     fn extract_chii_side_wait(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `extract_chii_middle_wait`
[INFO] [stdout]    --> src/hand/hand_arrangement.rs:276:8
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn extract_chii_middle_wait(&self, hidden_tiles : &Vec<Tile>) -> Option<(HandArrangement, Vec<Tile>)> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "9e51c93079a39dd4f976c32b7366ab1c5b6b6bdb01ec8ddbe2ec2b4be646910e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e51c93079a39dd4f976c32b7366ab1c5b6b6bdb01ec8ddbe2ec2b4be646910e", kill_on_drop: false }`
[INFO] [stdout] 9e51c93079a39dd4f976c32b7366ab1c5b6b6bdb01ec8ddbe2ec2b4be646910e