[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] 7ccad93cb673ddbfe19ff09dcee4069dcdeeca65
[INFO] testing sitegui/mhorloge against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsitegui%2Fmhorloge" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sitegui/mhorloge on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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-2/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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] 7090b006e7dde8750448e4797716da6b612dd6a52697f3f39feb3277d038bfa9
[INFO] running `Command { std: "docker" "start" "-a" "7090b006e7dde8750448e4797716da6b612dd6a52697f3f39feb3277d038bfa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7090b006e7dde8750448e4797716da6b612dd6a52697f3f39feb3277d038bfa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7090b006e7dde8750448e4797716da6b612dd6a52697f3f39feb3277d038bfa9", kill_on_drop: false }`
[INFO] [stdout] 7090b006e7dde8750448e4797716da6b612dd6a52697f3f39feb3277d038bfa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c2a022689b78b77e012924721c5415e28c79c9057b048c9c6ad222a3d4b2ae6
[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" "1c2a022689b78b77e012924721c5415e28c79c9057b048c9c6ad222a3d4b2ae6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling fixedbitset v0.4.0
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling petgraph v0.6.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling ordered-float v2.7.0
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling structopt v0.3.22
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling 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: 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: struct is never constructed: `Grasp`
[INFO] [stdout]  --> src/optimizer/grasp.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Grasp<T> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/optimizer/grasp.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(values: VecDeque<T>, size: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/optimizer/grasp.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn pop(&mut self, rng: &mut SmallRng) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/optimizer/population.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(rng: SmallRng, initial_values: Vec<V>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evolve_step`
[INFO] [stdout]   --> src/optimizer/population.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn evolve_step(&mut self, max_actions: usize, max_values: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `best`
[INFO] [stdout]   --> src/optimizer/population.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn best(&self) -> &V {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_best`
[INFO] [stdout]   --> src/optimizer/population.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn into_best(mut self) -> V {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evolve_era`
[INFO] [stdout]   --> src/optimizer/population.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn evolve_era(&mut self, patience: usize, max_actions: usize, max_values: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `values`
[INFO] [stdout]    --> src/optimizer/population.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn values(&self) -> &[V] {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `values_mut`
[INFO] [stdout]    --> src/optimizer/population.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn values_mut(&mut self) -> &mut Vec<V> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_best`
[INFO] [stdout]    --> src/optimizer/population.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn update_best(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 48 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 38s
[INFO] running `Command { std: "docker" "inspect" "1c2a022689b78b77e012924721c5415e28c79c9057b048c9c6ad222a3d4b2ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c2a022689b78b77e012924721c5415e28c79c9057b048c9c6ad222a3d4b2ae6", kill_on_drop: false }`
[INFO] [stdout] 1c2a022689b78b77e012924721c5415e28c79c9057b048c9c6ad222a3d4b2ae6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27ff9b242c2b0e1fd584385e17255fe3bb1737b84d2b2267a6dd25d922794566
[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" "27ff9b242c2b0e1fd584385e17255fe3bb1737b84d2b2267a6dd25d922794566", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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: struct is never constructed: `Grasp`
[INFO] [stdout]  --> src/optimizer/grasp.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Grasp<T> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/optimizer/grasp.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(values: VecDeque<T>, size: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/optimizer/grasp.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn pop(&mut self, rng: &mut SmallRng) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/optimizer/population.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new(rng: SmallRng, initial_values: Vec<V>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evolve_step`
[INFO] [stdout]   --> src/optimizer/population.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn evolve_step(&mut self, max_actions: usize, max_values: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `best`
[INFO] [stdout]   --> src/optimizer/population.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn best(&self) -> &V {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_best`
[INFO] [stdout]   --> src/optimizer/population.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn into_best(mut self) -> V {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evolve_era`
[INFO] [stdout]   --> src/optimizer/population.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn evolve_era(&mut self, patience: usize, max_actions: usize, max_values: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `values`
[INFO] [stdout]    --> src/optimizer/population.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn values(&self) -> &[V] {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `values_mut`
[INFO] [stdout]    --> src/optimizer/population.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn values_mut(&mut self) -> &mut Vec<V> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_best`
[INFO] [stdout]    --> src/optimizer/population.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn update_best(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.19s
[INFO] running `Command { std: "docker" "inspect" "27ff9b242c2b0e1fd584385e17255fe3bb1737b84d2b2267a6dd25d922794566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27ff9b242c2b0e1fd584385e17255fe3bb1737b84d2b2267a6dd25d922794566", kill_on_drop: false }`
[INFO] [stdout] 27ff9b242c2b0e1fd584385e17255fe3bb1737b84d2b2267a6dd25d922794566
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 308ea0a792ca783596ad579103fae68ed5cc95e2165059aa7f73ab822293c8c5
[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" "308ea0a792ca783596ad579103fae68ed5cc95e2165059aa7f73ab822293c8c5", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `cmd`
[INFO] [stderr]   --> src/clusterize.rs:28:19
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub fn clusterize(cmd: Clusterize) -> Result<(), Error> {
[INFO] [stderr]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cmd`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `a_common_letter`
[INFO] [stderr]   --> src/clusterize/cluster.rs:62:12
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn a_common_letter(&self, other: &Cluster, rng: &mut SmallRng) -> Option<char> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `a_position`
[INFO] [stderr]   --> src/clusterize/cluster.rs:69:12
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn a_position(&self, letter: char, rng: &mut SmallRng) -> Position {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `used_letters`
[INFO] [stderr]    --> src/clusterize/cluster.rs:196:8
[INFO] [stderr]     |
[INFO] [stderr] 196 |     fn used_letters(&self) -> RefMut<BTreeSet<char>> {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ClusterGraph`
[INFO] [stderr]  --> src/clusterize/cluster_graph.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct ClusterGraph {}
[INFO] [stderr]   |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Grasp`
[INFO] [stderr]  --> src/optimizer/grasp.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Grasp<T> {
[INFO] [stderr]   |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/optimizer/grasp.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(values: VecDeque<T>, size: usize) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pop`
[INFO] [stderr]   --> src/optimizer/grasp.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn pop(&mut self, rng: &mut SmallRng) -> Option<T> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/optimizer/population.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn new(rng: SmallRng, initial_values: Vec<V>) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `evolve_step`
[INFO] [stderr]   --> src/optimizer/population.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn evolve_step(&mut self, max_actions: usize, max_values: usize) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `best`
[INFO] [stderr]   --> src/optimizer/population.rs:69:12
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn best(&self) -> &V {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `into_best`
[INFO] [stderr]   --> src/optimizer/population.rs:73:12
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn into_best(mut self) -> V {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `evolve_era`
[INFO] [stderr]   --> src/optimizer/population.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn evolve_era(&mut self, patience: usize, max_actions: usize, max_values: usize) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `values`
[INFO] [stderr]    --> src/optimizer/population.rs:118:12
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn values(&self) -> &[V] {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `values_mut`
[INFO] [stderr]    --> src/optimizer/population.rs:122:12
[INFO] [stderr]     |
[INFO] [stderr] 122 |     pub fn values_mut(&mut self) -> &mut Vec<V> {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `update_best`
[INFO] [stderr]    --> src/optimizer/population.rs:126:8
[INFO] [stderr]     |
[INFO] [stderr] 126 |     fn update_best(&mut self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 16 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mhorloge-4c7a2764805b8564)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test clusterize::cluster::tests::test ... ok
[INFO] [stdout] test clusterize::constraints::tests::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "308ea0a792ca783596ad579103fae68ed5cc95e2165059aa7f73ab822293c8c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "308ea0a792ca783596ad579103fae68ed5cc95e2165059aa7f73ab822293c8c5", kill_on_drop: false }`
[INFO] [stdout] 308ea0a792ca783596ad579103fae68ed5cc95e2165059aa7f73ab822293c8c5