[INFO] cloning repository https://github.com/sitegui/mhorloge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sitegui/mhorloge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsitegui%2Fmhorloge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsitegui%2Fmhorloge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f88e7fc254ffcb6aa9a25774d845d787247fc216
[INFO] checking sitegui/mhorloge against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsitegui%2Fmhorloge" "/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/sitegui/mhorloge on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sitegui/mhorloge
[INFO] finished tweaking git repo https://github.com/sitegui/mhorloge
[INFO] tweaked toml for git repo https://github.com/sitegui/mhorloge written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/sitegui/mhorloge already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c447319b0bbdb8da1f2f49261f1b45461e4b1ab0c14dc6b937d59a36ba6dc6cd
[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" "c447319b0bbdb8da1f2f49261f1b45461e4b1ab0c14dc6b937d59a36ba6dc6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c447319b0bbdb8da1f2f49261f1b45461e4b1ab0c14dc6b937d59a36ba6dc6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c447319b0bbdb8da1f2f49261f1b45461e4b1ab0c14dc6b937d59a36ba6dc6cd", kill_on_drop: false }`
[INFO] [stdout] c447319b0bbdb8da1f2f49261f1b45461e4b1ab0c14dc6b937d59a36ba6dc6cd
[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=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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33fd5099284e28c375e50903bbebcb337fdb46c7e9aae3ad63fa02b9841cc4be
[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" "33fd5099284e28c375e50903bbebcb337fdb46c7e9aae3ad63fa02b9841cc4be", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking thread_local v1.1.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking ordered-float v2.0.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.2
[INFO] [stderr]     Checking env_logger v0.8.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.119
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking serde v1.0.119
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking mhorloge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `cmd`
[INFO] [stdout]   --> src/clusterize.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn clusterize(cmd: Clusterize) -> Result<(), Error> {
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cmd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmd`
[INFO] [stdout]   --> src/clusterize.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn clusterize(cmd: Clusterize) -> Result<(), Error> {
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cmd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Horizontal`
[INFO] [stdout]   --> src/clusterize/cluster.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     Horizontal,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Diagonal`
[INFO] [stdout]   --> src/clusterize/cluster.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Diagonal,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Vertical`
[INFO] [stdout]   --> src/clusterize/cluster.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Vertical,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/clusterize/cluster.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `a_common_letter`
[INFO] [stdout]   --> src/clusterize/cluster.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn a_common_letter(&self, other: &Cluster, rng: &mut SmallRng) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `a_position`
[INFO] [stdout]   --> src/clusterize/cluster.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn a_position(&self, letter: char, rng: &mut SmallRng) -> Position {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `all_superposed`
[INFO] [stdout]   --> src/clusterize/cluster.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn all_superposed(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_rotate_once`
[INFO] [stdout]    --> src/clusterize/cluster.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn can_rotate_once(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_rotate_twice`
[INFO] [stdout]    --> src/clusterize/cluster.rs:119:12
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn can_rotate_twice(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tokens`
[INFO] [stdout]    --> src/clusterize/cluster.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn tokens(&self) -> &[TokenInCluster] {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `constraints`
[INFO] [stdout]    --> src/clusterize/cluster.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn constraints(&self) -> &'a Constraints {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_superposed`
[INFO] [stdout]    --> src/clusterize/cluster.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn push_superposed(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `used_letters`
[INFO] [stdout]    --> src/clusterize/cluster.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn used_letters(&self) -> RefMut<BTreeSet<char>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unit`
[INFO] [stdout]    --> src/clusterize/cluster.rs:270:12
[INFO] [stdout]     |
[INFO] [stdout] 270 |     pub fn unit(self) -> Position {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ClusterGraph`
[INFO] [stdout]  --> src/clusterize/cluster_graph.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct ClusterGraph {}
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `AThenB`
[INFO] [stdout]   --> src/clusterize/constraints.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     AThenB,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BThenA`
[INFO] [stdout]   --> src/clusterize/constraints.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     BThenA,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/clusterize/constraints.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn new(tokenize: &TokenizeOut) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]   --> src/clusterize/constraints.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn get_mut(&mut self, a: TokenId, b: TokenId) -> &mut Constraint {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `None`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Once`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Once,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Twice`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Twice,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(cluster: &'a Cluster<'a>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotated`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn rotated(self) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tokens`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn tokens(self) -> impl Iterator<Item = TokenInCluster> + Clone + ExactSizeIterator + 'a {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_rotate_once`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn can_rotate_once(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_rotate_twice`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn can_rotate_twice(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `transform`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn transform(self, position: Position) -> Position {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn is_valid(self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_direction`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn new_direction(self, direction: Direction) -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_position`
[INFO] [stdout]   --> src/clusterize/rotated_cluster.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn new_position(self, position: Position) -> Position {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `respects`
[INFO] [stdout]   --> src/clusterize/token_in_cluster.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn respects(self, other: TokenInCluster, constraint: Constraint) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `letters`
[INFO] [stdout]   --> src/clusterize/token_in_cluster.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn letters<'a>(self, texts: &'a Texts) -> impl Iterator<Item = (Position, char)> + 'a {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_coexist`
[INFO] [stdout]   --> src/clusterize/token_in_cluster.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn can_coexist(self, other: TokenInCluster) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_before`
[INFO] [stdout]   --> src/clusterize/token_in_cluster.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn is_before(self, other: TokenInCluster) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `letter_position`
[INFO] [stdout]   --> src/clusterize/token_in_cluster.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn letter_position(self, index: usize) -> Position {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `a_common_letter`
[INFO] [stdout]   --> src/clusterize/cluster.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn a_common_letter(&self, other: &Cluster, rng: &mut SmallRng) -> Option<char> {
[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: `a_position`
[INFO] [stdout]   --> src/clusterize/cluster.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn a_position(&self, letter: char, rng: &mut SmallRng) -> Position {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `used_letters`
[INFO] [stdout]    --> src/clusterize/cluster.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn used_letters(&self) -> RefMut<BTreeSet<char>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ClusterGraph`
[INFO] [stdout]  --> src/clusterize/cluster_graph.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct ClusterGraph {}
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.23s
[INFO] running `Command { std: "docker" "inspect" "33fd5099284e28c375e50903bbebcb337fdb46c7e9aae3ad63fa02b9841cc4be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33fd5099284e28c375e50903bbebcb337fdb46c7e9aae3ad63fa02b9841cc4be", kill_on_drop: false }`
[INFO] [stdout] 33fd5099284e28c375e50903bbebcb337fdb46c7e9aae3ad63fa02b9841cc4be