[INFO] cloning repository https://github.com/loboyd/double-skunk-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/loboyd/double-skunk-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floboyd%2Fdouble-skunk-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floboyd%2Fdouble-skunk-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36d55209db5bfeadf34bd63259db96ce0750da45
[INFO] checking loboyd/double-skunk-rust against try#81275a1445c7502a974118e0c69b795ab60be991 for pr-80243
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floboyd%2Fdouble-skunk-rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/loboyd/double-skunk-rust on toolchain 81275a1445c7502a974118e0c69b795ab60be991
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/loboyd/double-skunk-rust
[INFO] finished tweaking git repo https://github.com/loboyd/double-skunk-rust
[INFO] tweaked toml for git repo https://github.com/loboyd/double-skunk-rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/loboyd/double-skunk-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termion v1.5.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f1318eccd16b59837ef42faac3e8d29ac3aa4e5ab8e777610b66bee53cdee17
[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" "2f1318eccd16b59837ef42faac3e8d29ac3aa4e5ab8e777610b66bee53cdee17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f1318eccd16b59837ef42faac3e8d29ac3aa4e5ab8e777610b66bee53cdee17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f1318eccd16b59837ef42faac3e8d29ac3aa4e5ab8e777610b66bee53cdee17", kill_on_drop: false }`
[INFO] [stdout] 2f1318eccd16b59837ef42faac3e8d29ac3aa4e5ab8e777610b66bee53cdee17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6a4f9a04086d83612108a7bb30380522efe85f4cd2d25f88871a776824cd886
[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" "e6a4f9a04086d83612108a7bb30380522efe85f4cd2d25f88871a776824cd886", kill_on_drop: false }`
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking double-skunk-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/hand.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/hand.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `starter`
[INFO] [stdout]   --> src/termion_ui.rs:64:69
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn get_discard(&self, dealer: bool, hand: &mut Vec<card::Card>, starter: &card::Card)
[INFO] [stdout]    |                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_starter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `raise_only` is never read
[INFO] [stdout]    --> src/termion_ui.rs:283:21
[INFO] [stdout]     |
[INFO] [stdout] 283 |                     raise_only = false; // TODO: Do we need this line?
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dealer`
[INFO] [stdout]   --> src/bogus_opponent.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn deal(&self, dealer: bool) -> (Vec<Card>, Card) {
[INFO] [stdout]    |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_dealer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `discarded`
[INFO] [stdout]   --> src/bogus_opponent.rs:31:38
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn discard( &self, dealer: bool, discarded: Vec::<Card>) -> Option<Vec<Card>>
[INFO] [stdout]    |                                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_discarded`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `card`
[INFO] [stdout]   --> src/bogus_opponent.rs:49:25
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn send_play(&self, card: card::Card) {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_card`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `crib`
[INFO] [stdout]   --> src/game.rs:43:17
[INFO] [stdout]    |
[INFO] [stdout] 43 |             let crib = self.opponent.discard(dealer, discarded);
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_crib`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `turn_up_suit`
[INFO] [stdout]    --> src/hand.rs:105:13
[INFO] [stdout]     |
[INFO] [stdout] 105 |         let turn_up_suit = starter.get_suit();
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_turn_up_suit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `turn_up_suit`
[INFO] [stdout]    --> src/hand.rs:111:21
[INFO] [stdout]     |
[INFO] [stdout] 111 |                     turn_up_suit
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_turn_up_suit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CARD_HEIGHT`
[INFO] [stdout]   --> src/termion_ui.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const CARD_HEIGHT: u16 = card::HEIGHT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CARD_WIDTH`
[INFO] [stdout]   --> src/termion_ui.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | const CARD_WIDTH:  u16 = card::WIDTH;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `self_score`
[INFO] [stdout]  --> src/game.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     self_score:     u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opp_score`
[INFO] [stdout]   --> src/game.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     opp_score:      u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEIGHT`
[INFO] [stdout]  --> src/card.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub const HEIGHT: u16 = 6;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `WIDTH`
[INFO] [stdout]  --> src/card.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const WIDTH:  u16 = 9;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Eight`
[INFO] [stdout]   --> src/card.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Eight,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nine`
[INFO] [stdout]   --> src/card.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Nine,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Ten`
[INFO] [stdout]   --> src/card.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Ten,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Jack`
[INFO] [stdout]   --> src/card.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Jack,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Queen`
[INFO] [stdout]   --> src/card.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Queen,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `King`
[INFO] [stdout]   --> src/card.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     King,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/card.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn next(self) -> Option<Self> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Clubs`
[INFO] [stdout]   --> src/card.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Clubs,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Diamonds`
[INFO] [stdout]   --> src/card.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     Diamonds,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `starter`
[INFO] [stdout]   --> src/termion_ui.rs:64:69
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn get_discard(&self, dealer: bool, hand: &mut Vec<card::Card>, starter: &card::Card)
[INFO] [stdout]    |                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_starter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `raise_only` is never read
[INFO] [stdout]    --> src/termion_ui.rs:283:21
[INFO] [stdout]     |
[INFO] [stdout] 283 |                     raise_only = false; // TODO: Do we need this line?
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dealer`
[INFO] [stdout]   --> src/bogus_opponent.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn deal(&self, dealer: bool) -> (Vec<Card>, Card) {
[INFO] [stdout]    |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_dealer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `discarded`
[INFO] [stdout]   --> src/bogus_opponent.rs:31:38
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn discard( &self, dealer: bool, discarded: Vec::<Card>) -> Option<Vec<Card>>
[INFO] [stdout]    |                                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_discarded`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `card`
[INFO] [stdout]   --> src/bogus_opponent.rs:49:25
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn send_play(&self, card: card::Card) {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_card`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `crib`
[INFO] [stdout]   --> src/game.rs:43:17
[INFO] [stdout]    |
[INFO] [stdout] 43 |             let crib = self.opponent.discard(dealer, discarded);
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_crib`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `turn_up_suit`
[INFO] [stdout]    --> src/hand.rs:105:13
[INFO] [stdout]     |
[INFO] [stdout] 105 |         let turn_up_suit = starter.get_suit();
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_turn_up_suit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `turn_up_suit`
[INFO] [stdout]    --> src/hand.rs:111:21
[INFO] [stdout]     |
[INFO] [stdout] 111 |                     turn_up_suit
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_turn_up_suit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CARD_HEIGHT`
[INFO] [stdout]   --> src/termion_ui.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const CARD_HEIGHT: u16 = card::HEIGHT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CARD_WIDTH`
[INFO] [stdout]   --> src/termion_ui.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | const CARD_WIDTH:  u16 = card::WIDTH;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `self_score`
[INFO] [stdout]  --> src/game.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     self_score:     u16,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opp_score`
[INFO] [stdout]   --> src/game.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     opp_score:      u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEIGHT`
[INFO] [stdout]  --> src/card.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub const HEIGHT: u16 = 6;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `WIDTH`
[INFO] [stdout]  --> src/card.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const WIDTH:  u16 = 9;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Eight`
[INFO] [stdout]   --> src/card.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Eight,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nine`
[INFO] [stdout]   --> src/card.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Nine,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Ten`
[INFO] [stdout]   --> src/card.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Ten,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Jack`
[INFO] [stdout]   --> src/card.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Jack,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Queen`
[INFO] [stdout]   --> src/card.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Queen,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `King`
[INFO] [stdout]   --> src/card.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     King,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/card.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn next(self) -> Option<Self> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Clubs`
[INFO] [stdout]   --> src/card.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Clubs,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Diamonds`
[INFO] [stdout]   --> src/card.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     Diamonds,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "e6a4f9a04086d83612108a7bb30380522efe85f4cd2d25f88871a776824cd886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a4f9a04086d83612108a7bb30380522efe85f4cd2d25f88871a776824cd886", kill_on_drop: false }`
[INFO] [stdout] e6a4f9a04086d83612108a7bb30380522efe85f4cd2d25f88871a776824cd886