[INFO] cloning repository https://github.com/dali99/mercury
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dali99/mercury" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdali99%2Fmercury", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdali99%2Fmercury'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94982994f56afed04185edb7417ed2f901c37bad
[INFO] testing dali99/mercury against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdali99%2Fmercury" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dali99/mercury on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dali99/mercury
[INFO] finished tweaking git repo https://github.com/dali99/mercury
[INFO] tweaked toml for git repo https://github.com/dali99/mercury written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/dali99/mercury already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cached_proc_macro v0.6.2
[INFO] [stderr]   Downloaded cached v0.23.0
[INFO] [stderr]   Downloaded modular-bitfield v0.11.2
[INFO] [stderr]   Downloaded coz v0.1.3
[INFO] [stderr]   Downloaded modular-bitfield-impl v0.11.2
[INFO] [stderr]   Downloaded byte-strings-proc_macros v0.2.2
[INFO] [stderr]   Downloaded thousands v0.2.0
[INFO] [stderr]   Downloaded byte-strings v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] bc4b93fa5eea09b553fb64b0a7fe71b0a1f4be82b2392fcfc02c8860abf5c970
[INFO] running `Command { std: "docker" "start" "-a" "bc4b93fa5eea09b553fb64b0a7fe71b0a1f4be82b2392fcfc02c8860abf5c970", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc4b93fa5eea09b553fb64b0a7fe71b0a1f4be82b2392fcfc02c8860abf5c970", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc4b93fa5eea09b553fb64b0a7fe71b0a1f4be82b2392fcfc02c8860abf5c970", kill_on_drop: false }`
[INFO] [stdout] bc4b93fa5eea09b553fb64b0a7fe71b0a1f4be82b2392fcfc02c8860abf5c970
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] d9d7860b59737cb95b3fc8e98c9a39200477ce17b8cfe4f57f4404b25e5ee68e
[INFO] running `Command { std: "docker" "start" "-a" "d9d7860b59737cb95b3fc8e98c9a39200477ce17b8cfe4f57f4404b25e5ee68e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling futures-io v0.3.21
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling async-trait v0.1.52
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling cached_proc_macro_types v0.1.0
[INFO] [stderr]    Compiling event-listener v2.5.2
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling thousands v0.2.0
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling getrandom v0.2.4
[INFO] [stderr]    Compiling coz v0.1.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling darling_core v0.13.1
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling byte-strings-proc_macros v0.2.2
[INFO] [stderr]    Compiling darling_macro v0.13.1
[INFO] [stderr]    Compiling byte-strings v0.2.2
[INFO] [stderr]    Compiling modular-bitfield v0.11.2
[INFO] [stderr]    Compiling darling v0.13.1
[INFO] [stderr]    Compiling cached_proc_macro v0.6.2
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling cached v0.23.0
[INFO] [stderr]    Compiling mercury v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `::byte_strings::concat_bytes`
[INFO] [stdout]   --> src/azul.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use ::byte_strings::concat_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/azul.rs:504:61
[INFO] [stdout]     |
[INFO] [stdout] 504 |                         Tile::Blue => {self.box_top.blue += (row as u8 + 1)}
[INFO] [stdout]     |                                                             ^             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 504 -                         Tile::Blue => {self.box_top.blue += (row as u8 + 1)}
[INFO] [stdout] 504 +                         Tile::Blue => {self.box_top.blue += row as u8 + 1}
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/azul.rs:505:65
[INFO] [stdout]     |
[INFO] [stdout] 505 |                         Tile::Yellow => {self.box_top.yellow += (row as u8 + 1)}
[INFO] [stdout]     |                                                                 ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 505 -                         Tile::Yellow => {self.box_top.yellow += (row as u8 + 1)}
[INFO] [stdout] 505 +                         Tile::Yellow => {self.box_top.yellow += row as u8 + 1}
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/azul.rs:506:59
[INFO] [stdout]     |
[INFO] [stdout] 506 |                         Tile::Red => {self.box_top.red += (row as u8 + 1)}
[INFO] [stdout]     |                                                           ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 506 -                         Tile::Red => {self.box_top.red += (row as u8 + 1)}
[INFO] [stdout] 506 +                         Tile::Red => {self.box_top.red += row as u8 + 1}
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/azul.rs:507:63
[INFO] [stdout]     |
[INFO] [stdout] 507 |                         Tile::Black => {self.box_top.black += (row as u8 + 1)}
[INFO] [stdout]     |                                                               ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 507 -                         Tile::Black => {self.box_top.black += (row as u8 + 1)}
[INFO] [stdout] 507 +                         Tile::Black => {self.box_top.black += row as u8 + 1}
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/azul.rs:508:61
[INFO] [stdout]     |
[INFO] [stdout] 508 |                         Tile::Teal => {self.box_top.teal += (row as u8 + 1)}
[INFO] [stdout]     |                                                             ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 508 -                         Tile::Teal => {self.box_top.teal += (row as u8 + 1)}
[INFO] [stdout] 508 +                         Tile::Teal => {self.box_top.teal += row as u8 + 1}
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]   --> src/azul2.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 39 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 39 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]   --> src/azul2.rs:50:1
[INFO] [stdout]    |
[INFO] [stdout] 50 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 50 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 50 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]   --> src/azul2.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 93 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 93 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:136:1
[INFO] [stdout]     |
[INFO] [stdout] 136 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 136 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 136 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 147 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 147 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:157:1
[INFO] [stdout]     |
[INFO] [stdout] 157 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 157 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 157 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:169:1
[INFO] [stdout]     |
[INFO] [stdout] 169 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 169 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 169 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:173:1
[INFO] [stdout]     |
[INFO] [stdout] 173 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 173 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 173 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:177:1
[INFO] [stdout]     |
[INFO] [stdout] 177 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 177 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 177 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 181 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 181 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 185 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 185 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:190:1
[INFO] [stdout]     |
[INFO] [stdout] 190 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 190 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 190 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]    --> src/azul2.rs:201:1
[INFO] [stdout]     |
[INFO] [stdout] 201 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 201 - #[derive(BitfieldSpecifier)]
[INFO] [stdout] 201 + #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `Instant`
[INFO] [stdout]    --> src/azul2.rs:485:17
[INFO] [stdout]     |
[INFO] [stdout] 485 | use std::time::{Instant, Duration};
[INFO] [stdout]     |                 ^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/azul2.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(bench_black_box)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:64:21
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn run(rng: StdRng) -> Result<(), &'static str> {
[INFO] [stdout]    |        ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/main.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn run(rng: StdRng) -> Result<(), &'static str> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `size_of_stuff`
[INFO] [stdout]   --> src/azul.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn size_of_stuff() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]    --> src/azul.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn len(&self) -> u8 {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]    --> src/azul.rs:203:8
[INFO] [stdout]     |
[INFO] [stdout] 203 |     fn is_empty(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hash`
[INFO] [stdout]    --> src/azul.rs:206:8
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn hash(&self) -> [u8; 5] {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `wall_index`
[INFO] [stdout]    --> src/azul.rs:321:8
[INFO] [stdout]     |
[INFO] [stdout] 321 |     fn wall_index(color: Tile, row: usize) -> Result<usize, &'static str> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `connected`
[INFO] [stdout]    --> src/azul.rs:376:8
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn connected(&self, coordinate: (usize, usize)) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fill`
[INFO] [stdout]    --> src/azul.rs:456:12
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn fill(&mut self, mut rng: StdRng) -> Result<(), &'static str> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `score`
[INFO] [stdout]    --> src/azul.rs:493:8
[INFO] [stdout]     |
[INFO] [stdout] 493 |     fn score(&mut self) -> Result<(), &'static str> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_some`
[INFO] [stdout]   --> src/azul2.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn is_some(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]   --> src/azul2.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]   --> src/azul2.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]   --> src/azul2.rs:50:1
[INFO] [stdout]    |
[INFO] [stdout] 50 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]   --> src/azul2.rs:50:1
[INFO] [stdout]    |
[INFO] [stdout] 50 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/azul2.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn is_full(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_to_first`
[INFO] [stdout]   --> src/azul2.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn add_to_first(&mut self, tile: Tile2) -> Result<(), Tile2> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]   --> src/azul2.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]   --> src/azul2.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]    | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_to_firsts`
[INFO] [stdout]    --> src/azul2.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn add_to_firsts(&mut self, tile: Tile2) -> Result<(), Tile2>{
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:136:1
[INFO] [stdout]     |
[INFO] [stdout] 136 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:136:1
[INFO] [stdout]     |
[INFO] [stdout] 136 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `one`
[INFO] [stdout]    --> src/azul2.rs:139:5
[INFO] [stdout]     |
[INFO] [stdout] 139 |     one: bool,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two`
[INFO] [stdout]    --> src/azul2.rs:140:5
[INFO] [stdout]     |
[INFO] [stdout] 140 |     two: bool,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `three`
[INFO] [stdout]    --> src/azul2.rs:141:5
[INFO] [stdout]     |
[INFO] [stdout] 141 |     three: bool,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `four`
[INFO] [stdout]    --> src/azul2.rs:142:5
[INFO] [stdout]     |
[INFO] [stdout] 142 |     four: bool,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `five`
[INFO] [stdout]    --> src/azul2.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 143 |     five: bool
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `one`
[INFO] [stdout]    --> src/azul2.rs:150:5
[INFO] [stdout]     |
[INFO] [stdout] 150 |     one: Row2,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two`
[INFO] [stdout]    --> src/azul2.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 151 |     two: Row2,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `three`
[INFO] [stdout]    --> src/azul2.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 |     three: Row2,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `four`
[INFO] [stdout]    --> src/azul2.rs:153:5
[INFO] [stdout]     |
[INFO] [stdout] 153 |     four: Row2,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `five`
[INFO] [stdout]    --> src/azul2.rs:154:5
[INFO] [stdout]     |
[INFO] [stdout] 154 |     five: Row2
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:157:1
[INFO] [stdout]     |
[INFO] [stdout] 157 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:157:1
[INFO] [stdout]     |
[INFO] [stdout] 157 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `blue`
[INFO] [stdout]    --> src/azul2.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     blue: B5,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `yellow`
[INFO] [stdout]    --> src/azul2.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 |     yellow: B5,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `red`
[INFO] [stdout]    --> src/azul2.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     red: B5,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `black`
[INFO] [stdout]    --> src/azul2.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 163 |     black: B5,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `teal`
[INFO] [stdout]    --> src/azul2.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 164 |     teal: B5,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start`
[INFO] [stdout]    --> src/azul2.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 165 |     start: bool
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:169:1
[INFO] [stdout]     |
[INFO] [stdout] 169 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:169:1
[INFO] [stdout]     |
[INFO] [stdout] 169 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:173:1
[INFO] [stdout]     |
[INFO] [stdout] 173 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:173:1
[INFO] [stdout]     |
[INFO] [stdout] 173 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:177:1
[INFO] [stdout]     |
[INFO] [stdout] 177 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:177:1
[INFO] [stdout]     |
[INFO] [stdout] 177 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:190:1
[INFO] [stdout]     |
[INFO] [stdout] 190 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:190:1
[INFO] [stdout]     |
[INFO] [stdout] 190 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `one`
[INFO] [stdout]    --> src/azul2.rs:193:5
[INFO] [stdout]     |
[INFO] [stdout] 193 |     one: Pattern2_1,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two`
[INFO] [stdout]    --> src/azul2.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     two: Pattern2_2,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `three`
[INFO] [stdout]    --> src/azul2.rs:195:5
[INFO] [stdout]     |
[INFO] [stdout] 195 |     three: Pattern2_3,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `four`
[INFO] [stdout]    --> src/azul2.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 |     four: Pattern2_4,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `five`
[INFO] [stdout]    --> src/azul2.rs:197:5
[INFO] [stdout]     |
[INFO] [stdout] 197 |     five: Pattern2_5,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:201:1
[INFO] [stdout]     |
[INFO] [stdout] 201 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:201:1
[INFO] [stdout]     |
[INFO] [stdout] 201 | #[derive(BitfieldSpecifier)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `score`
[INFO] [stdout]    --> src/azul2.rs:204:5
[INFO] [stdout]     |
[INFO] [stdout] 204 |     score: B7,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `wall`
[INFO] [stdout]    --> src/azul2.rs:205:5
[INFO] [stdout]     |
[INFO] [stdout] 205 |     wall: Wall2,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `patterns`
[INFO] [stdout]    --> src/azul2.rs:206:5
[INFO] [stdout]     |
[INFO] [stdout] 206 |     patterns: Patterns2,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `floor`
[INFO] [stdout]    --> src/azul2.rs:207:5
[INFO] [stdout]     |
[INFO] [stdout] 207 |     floor: Market2
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_bytes`
[INFO] [stdout]    --> src/azul2.rs:218:1
[INFO] [stdout]     |
[INFO] [stdout] 218 | #[derive(Debug, Copy, Clone)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_bytes`
[INFO] [stdout]    --> src/azul2.rs:218:1
[INFO] [stdout]     |
[INFO] [stdout] 218 | #[derive(Debug, Copy, Clone)]
[INFO] [stdout]     | ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `player`
[INFO] [stdout]    --> src/azul2.rs:220:5
[INFO] [stdout]     |
[INFO] [stdout] 220 |     player: Player2,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `box_top`
[INFO] [stdout]    --> src/azul2.rs:221:5
[INFO] [stdout]     |
[INFO] [stdout] 221 |     box_top: Bag2,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `market`
[INFO] [stdout]    --> src/azul2.rs:223:5
[INFO] [stdout]     |
[INFO] [stdout] 223 |     market: Market2,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `board_1`
[INFO] [stdout]    --> src/azul2.rs:225:5
[INFO] [stdout]     |
[INFO] [stdout] 225 |     board_1: Board2,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `board_2`
[INFO] [stdout]    --> src/azul2.rs:226:5
[INFO] [stdout]     |
[INFO] [stdout] 226 |     board_2: Board2,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             game.fill(StdRng::seed_from_u64(42));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/azul2.rs:112:13
[INFO] [stdout]     |
[INFO] [stdout] 112 |             self.one().add_to_first(tile);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/azul2.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |             self.two().add_to_first(tile);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/azul2.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |             self.three().add_to_first(tile);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/azul2.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout] 124 |             self.four().add_to_first(tile);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/azul2.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |             self.five().add_to_first(tile);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 100 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mercury` due to 2 previous errors; 100 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d9d7860b59737cb95b3fc8e98c9a39200477ce17b8cfe4f57f4404b25e5ee68e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9d7860b59737cb95b3fc8e98c9a39200477ce17b8cfe4f57f4404b25e5ee68e", kill_on_drop: false }`
[INFO] [stdout] d9d7860b59737cb95b3fc8e98c9a39200477ce17b8cfe4f57f4404b25e5ee68e