[INFO] cloning repository https://github.com/menixator/biocomputation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/menixator/biocomputation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmenixator%2Fbiocomputation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmenixator%2Fbiocomputation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fce4c70f5865d933893abf7751e20b28ec7e3fd5
[INFO] testing menixator/biocomputation against 1.94.0 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmenixator%2Fbiocomputation" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/menixator/biocomputation
[INFO] finished tweaking git repo https://github.com/menixator/biocomputation
[INFO] tweaked toml for git repo https://github.com/menixator/biocomputation written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/menixator/biocomputation on toolchain 1.94.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.94.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/menixator/biocomputation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.94.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror v1.0.20
[INFO] [stderr]   Downloaded serde_derive v1.0.115
[INFO] [stderr]   Downloaded thiserror-impl v1.0.20
[INFO] [stderr]   Downloaded serde v1.0.115
[INFO] [stderr]   Downloaded libc v0.2.76
[INFO] [stderr]   Downloaded syn v1.0.39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4bf5d476a30bb7368fe9a70880ad2422290ac779a85493177ba467c4d574780e
[INFO] running `Command { std: "docker" "start" "-a" "4bf5d476a30bb7368fe9a70880ad2422290ac779a85493177ba467c4d574780e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bf5d476a30bb7368fe9a70880ad2422290ac779a85493177ba467c4d574780e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bf5d476a30bb7368fe9a70880ad2422290ac779a85493177ba467c4d574780e", kill_on_drop: false }`
[INFO] [stdout] 4bf5d476a30bb7368fe9a70880ad2422290ac779a85493177ba467c4d574780e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90cada43110d96bb2458fe57f6456c95acb458c08f76ed7fc963a27398f6808d
[INFO] running `Command { std: "docker" "start" "-a" "90cada43110d96bb2458fe57f6456c95acb458c08f76ed7fc963a27398f6808d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling structopt-derive v0.4.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]    Compiling structopt v0.3.17
[INFO] [stderr]    Compiling biocomputation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize` and `Serialize`
[INFO] [stdout]  --> src/main.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Serialize`
[INFO] [stdout]  --> src/ga_spec.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::dataitem::DataItem`
[INFO] [stdout]  --> src/population.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::dataitem::DataItem;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Display`
[INFO] [stdout]  --> src/rule.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt::{self, Debug, Display};
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::candidate::Candidate`
[INFO] [stdout]  --> src/selection.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::candidate::Candidate;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CrossoverStrategyCommonOptions`, `CrossoverStrategy`, `MatchupStrategy`, `MatingStrategy`, and `MirroringStrategy`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     CrossoverStrategy, CrossoverStrategyCommonOptions, MatchupStrategy, MatingStrategy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 20 |     MirroringStrategy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MutationStrategyCommonOptions`, `MutationStrategyVariant`, and `MutationStrategy`
[INFO] [stdout]   --> src/main.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 | use mutation::{MutationStrategy, MutationStrategyCommonOptions, MutationStrategyVariant};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `GaSpec`
[INFO] [stdout]   --> src/main.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 | use ga_spec::{CalculatedSpecs, GaSpec, GaSpecInput};
[INFO] [stdout]    |                                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DuplicateHandlingStrategy`, `RouletteSelection`, `SelectionStrategyCommonOptions`, `SelectionStrategyVariant`, `SelectionStrategy`, and `TournamentSelection`
[INFO] [stdout]   --> src/main.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     DuplicateHandlingStrategy, RouletteSelection, Selection, SelectionStrategy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 28 |     SelectionStrategyCommonOptions, SelectionStrategyVariant, TournamentSelection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Selection`
[INFO] [stdout]   --> src/main.rs:27:51
[INFO] [stdout]    |
[INFO] [stdout] 27 |     DuplicateHandlingStrategy, RouletteSelection, Selection, SelectionStrategy,
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mutation.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         mut population: &mut Population,
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rule.rs:48:29
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn generate<T: Rng>(mut rng: &mut T, spec: &GaSpec) -> Self {
[INFO] [stdout]    |                             ----^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/selection.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |             for i in 0..self.tournament_size {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]   --> src/main.rs:78:20
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let (training, test) = data_set.split_at_percentage(opt.split_percentage)?;
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |     for i in 0..ga_specs.max_evolutions {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidate`
[INFO] [stdout]    --> src/main.rs:102:41
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for CandidateFitness { fitness, candidate } in &fitness {
[INFO] [stdout]     |                                         ^^^^^^^^^ help: try ignoring the field: `candidate: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mutation_count` is never read
[INFO] [stdout]   --> src/candidate.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Candidate {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 12 |     rules: HashSet<Rule>,
[INFO] [stdout] 13 |     mutation_count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Candidate` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `mutation_count`, `set_mutation_count`, `increment_mutation_count`, `age`, `birth_generation_id`, and `rules_mut` are never used
[INFO] [stdout]   --> src/candidate.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Candidate {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn mutation_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn set_mutation_count(&mut self, new_mutation_count: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn increment_mutation_count(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn age(&mut self, current_generation_id: usize) -> Option<isize> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn birth_generation_id(&self) -> Option<usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn rules_mut(&mut self) -> &mut HashSet<Rule> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `RngFail` is never constructed
[INFO] [stdout]   --> src/crossover.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub enum CrossoverError {
[INFO] [stdout]    |          -------------- variant in this enum
[INFO] [stdout] 56 |     #[error("rng failed to generate a unique value")]
[INFO] [stdout] 57 |     RngFail,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CrossoverError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `char_at` is never used
[INFO] [stdout]   --> src/dataitem.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl DataItem {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn char_at(&self, index: usize) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `HeterogenousData` and `InvalidPercentage` are never constructed
[INFO] [stdout]   --> src/dataset.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub enum DataSetError {
[INFO] [stdout]    |          ------------ variants in this enum
[INFO] [stdout] 62 |     #[error("found different kinds of data")]
[INFO] [stdout] 63 |     HeterogenousData,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     InvalidPercentage,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DataSetError` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_generation` and `candidates_mut` are never used
[INFO] [stdout]   --> src/population.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Population {
[INFO] [stdout]    | --------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn set_generation(&mut self, new_generation: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn candidates_mut(&mut self) -> &mut HashSet<Candidate> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/population.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         &self,
[INFO] [stdout]    |         ^^^^^ the lifetime is elided here
[INFO] [stdout] 72 |         data_set: &'_ DataSet,
[INFO] [stdout] 73 |     ) -> Result<Vec<CandidateFitness>, FitnessCalculationError> {
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 |     ) -> Result<Vec<CandidateFitness<'_>>, FitnessCalculationError> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.12s
[INFO] running `Command { std: "docker" "inspect" "90cada43110d96bb2458fe57f6456c95acb458c08f76ed7fc963a27398f6808d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90cada43110d96bb2458fe57f6456c95acb458c08f76ed7fc963a27398f6808d", kill_on_drop: false }`
[INFO] [stdout] 90cada43110d96bb2458fe57f6456c95acb458c08f76ed7fc963a27398f6808d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 723024932bcbd65ab551501a7110b615e5e1824e0af45a5be804ea69c145a18a
[INFO] running `Command { std: "docker" "start" "-a" "723024932bcbd65ab551501a7110b615e5e1824e0af45a5be804ea69c145a18a", kill_on_drop: false }`
[INFO] [stderr]    Compiling biocomputation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize` and `Serialize`
[INFO] [stdout]  --> src/main.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Serialize`
[INFO] [stdout]  --> src/ga_spec.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::dataitem::DataItem`
[INFO] [stdout]  --> src/population.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::dataitem::DataItem;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Display`
[INFO] [stdout]  --> src/rule.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt::{self, Debug, Display};
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::candidate::Candidate`
[INFO] [stdout]  --> src/selection.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::candidate::Candidate;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CrossoverStrategyCommonOptions`, `CrossoverStrategy`, `MatchupStrategy`, `MatingStrategy`, and `MirroringStrategy`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     CrossoverStrategy, CrossoverStrategyCommonOptions, MatchupStrategy, MatingStrategy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 20 |     MirroringStrategy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MutationStrategyCommonOptions`, `MutationStrategyVariant`, and `MutationStrategy`
[INFO] [stdout]   --> src/main.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 | use mutation::{MutationStrategy, MutationStrategyCommonOptions, MutationStrategyVariant};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `GaSpec`
[INFO] [stdout]   --> src/main.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 | use ga_spec::{CalculatedSpecs, GaSpec, GaSpecInput};
[INFO] [stdout]    |                                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DuplicateHandlingStrategy`, `RouletteSelection`, `SelectionStrategyCommonOptions`, `SelectionStrategyVariant`, `SelectionStrategy`, and `TournamentSelection`
[INFO] [stdout]   --> src/main.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     DuplicateHandlingStrategy, RouletteSelection, Selection, SelectionStrategy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 28 |     SelectionStrategyCommonOptions, SelectionStrategyVariant, TournamentSelection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Selection`
[INFO] [stdout]   --> src/main.rs:27:51
[INFO] [stdout]    |
[INFO] [stdout] 27 |     DuplicateHandlingStrategy, RouletteSelection, Selection, SelectionStrategy,
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mutation.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         mut population: &mut Population,
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rule.rs:48:29
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn generate<T: Rng>(mut rng: &mut T, spec: &GaSpec) -> Self {
[INFO] [stdout]    |                             ----^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/selection.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |             for i in 0..self.tournament_size {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]   --> src/main.rs:78:20
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let (training, test) = data_set.split_at_percentage(opt.split_percentage)?;
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |     for i in 0..ga_specs.max_evolutions {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidate`
[INFO] [stdout]    --> src/main.rs:102:41
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for CandidateFitness { fitness, candidate } in &fitness {
[INFO] [stdout]     |                                         ^^^^^^^^^ help: try ignoring the field: `candidate: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mutation_count` is never read
[INFO] [stdout]   --> src/candidate.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Candidate {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 12 |     rules: HashSet<Rule>,
[INFO] [stdout] 13 |     mutation_count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Candidate` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `mutation_count`, `set_mutation_count`, `increment_mutation_count`, `age`, `birth_generation_id`, and `rules_mut` are never used
[INFO] [stdout]   --> src/candidate.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Candidate {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn mutation_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn set_mutation_count(&mut self, new_mutation_count: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn increment_mutation_count(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn age(&mut self, current_generation_id: usize) -> Option<isize> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn birth_generation_id(&self) -> Option<usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn rules_mut(&mut self) -> &mut HashSet<Rule> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `RngFail` is never constructed
[INFO] [stdout]   --> src/crossover.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub enum CrossoverError {
[INFO] [stdout]    |          -------------- variant in this enum
[INFO] [stdout] 56 |     #[error("rng failed to generate a unique value")]
[INFO] [stdout] 57 |     RngFail,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CrossoverError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `HeterogenousData` and `InvalidPercentage` are never constructed
[INFO] [stdout]   --> src/dataset.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub enum DataSetError {
[INFO] [stdout]    |          ------------ variants in this enum
[INFO] [stdout] 62 |     #[error("found different kinds of data")]
[INFO] [stdout] 63 |     HeterogenousData,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     InvalidPercentage,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DataSetError` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_generation` and `candidates_mut` are never used
[INFO] [stdout]   --> src/population.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Population {
[INFO] [stdout]    | --------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn set_generation(&mut self, new_generation: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn candidates_mut(&mut self) -> &mut HashSet<Candidate> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/population.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         &self,
[INFO] [stdout]    |         ^^^^^ the lifetime is elided here
[INFO] [stdout] 72 |         data_set: &'_ DataSet,
[INFO] [stdout] 73 |     ) -> Result<Vec<CandidateFitness>, FitnessCalculationError> {
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 73 |     ) -> Result<Vec<CandidateFitness<'_>>, FitnessCalculationError> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "723024932bcbd65ab551501a7110b615e5e1824e0af45a5be804ea69c145a18a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "723024932bcbd65ab551501a7110b615e5e1824e0af45a5be804ea69c145a18a", kill_on_drop: false }`
[INFO] [stdout] 723024932bcbd65ab551501a7110b615e5e1824e0af45a5be804ea69c145a18a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cb593e4ea704bbd96ee77d7959532829dda5da2c942b5ba3ffc047b60ff52e31
[INFO] running `Command { std: "docker" "start" "-a" "cb593e4ea704bbd96ee77d7959532829dda5da2c942b5ba3ffc047b60ff52e31", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Deserialize` and `Serialize`
[INFO] [stderr]  --> src/main.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use serde::{Deserialize, Serialize};
[INFO] [stderr]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde_json`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use serde_json;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Serialize`
[INFO] [stderr]  --> src/ga_spec.rs:4:26
[INFO] [stderr]   |
[INFO] [stderr] 4 | use serde::{Deserialize, Serialize};
[INFO] [stderr]   |                          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::dataitem::DataItem`
[INFO] [stderr]  --> src/population.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::dataitem::DataItem;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Display`
[INFO] [stderr]  --> src/rule.rs:4:29
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::{self, Debug, Display};
[INFO] [stderr]   |                             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::candidate::Candidate`
[INFO] [stderr]  --> src/selection.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::candidate::Candidate;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `CrossoverStrategyCommonOptions`, `CrossoverStrategy`, `MatchupStrategy`, `MatingStrategy`, and `MirroringStrategy`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     CrossoverStrategy, CrossoverStrategyCommonOptions, MatchupStrategy, MatingStrategy,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stderr] 20 |     MirroringStrategy,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `MutationStrategyCommonOptions`, `MutationStrategyVariant`, and `MutationStrategy`
[INFO] [stderr]   --> src/main.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 | use mutation::{MutationStrategy, MutationStrategyCommonOptions, MutationStrategyVariant};
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `GaSpec`
[INFO] [stderr]   --> src/main.rs:24:32
[INFO] [stderr]    |
[INFO] [stderr] 24 | use ga_spec::{CalculatedSpecs, GaSpec, GaSpecInput};
[INFO] [stderr]    |                                ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DuplicateHandlingStrategy`, `RouletteSelection`, `SelectionStrategyCommonOptions`, `SelectionStrategyVariant`, `SelectionStrategy`, and `TournamentSelection`
[INFO] [stderr]   --> src/main.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     DuplicateHandlingStrategy, RouletteSelection, Selection, SelectionStrategy,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 28 |     SelectionStrategyCommonOptions, SelectionStrategyVariant, TournamentSelection,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Selection`
[INFO] [stderr]   --> src/main.rs:27:51
[INFO] [stderr]    |
[INFO] [stderr] 27 |     DuplicateHandlingStrategy, RouletteSelection, Selection, SelectionStrategy,
[INFO] [stderr]    |                                                   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/mutation.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |         mut population: &mut Population,
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rule.rs:48:29
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn generate<T: Rng>(mut rng: &mut T, spec: &GaSpec) -> Self {
[INFO] [stderr]    |                             ----^^^
[INFO] [stderr]    |                             |
[INFO] [stderr]    |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/selection.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |             for i in 0..self.tournament_size {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test`
[INFO] [stderr]   --> src/main.rs:78:20
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let (training, test) = data_set.split_at_percentage(opt.split_percentage)?;
[INFO] [stderr]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 95 |     for i in 0..ga_specs.max_evolutions {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `candidate`
[INFO] [stderr]    --> src/main.rs:102:41
[INFO] [stderr]     |
[INFO] [stderr] 102 |         for CandidateFitness { fitness, candidate } in &fitness {
[INFO] [stderr]     |                                         ^^^^^^^^^ help: try ignoring the field: `candidate: _`
[INFO] [stderr] 
[INFO] [stderr] warning: field `mutation_count` is never read
[INFO] [stderr]   --> src/candidate.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Candidate {
[INFO] [stderr]    |            --------- field in this struct
[INFO] [stderr] 12 |     rules: HashSet<Rule>,
[INFO] [stderr] 13 |     mutation_count: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Candidate` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: methods `mutation_count`, `set_mutation_count`, `increment_mutation_count`, `age`, `birth_generation_id`, and `rules_mut` are never used
[INFO] [stderr]   --> src/candidate.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl Candidate {
[INFO] [stderr]    | -------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 44 |     pub fn mutation_count(&self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 48 |     pub fn set_mutation_count(&mut self, new_mutation_count: usize) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 52 |     pub fn increment_mutation_count(&mut self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 56 |     pub fn age(&mut self, current_generation_id: usize) -> Option<isize> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 66 |     pub fn birth_generation_id(&self) -> Option<usize> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 74 |     pub fn rules_mut(&mut self) -> &mut HashSet<Rule> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `RngFail` is never constructed
[INFO] [stderr]   --> src/crossover.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub enum CrossoverError {
[INFO] [stderr]    |          -------------- variant in this enum
[INFO] [stderr] 56 |     #[error("rng failed to generate a unique value")]
[INFO] [stderr] 57 |     RngFail,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `CrossoverError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `HeterogenousData` and `InvalidPercentage` are never constructed
[INFO] [stderr]   --> src/dataset.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub enum DataSetError {
[INFO] [stderr]    |          ------------ variants in this enum
[INFO] [stderr] 62 |     #[error("found different kinds of data")]
[INFO] [stderr] 63 |     HeterogenousData,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 69 |     InvalidPercentage,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `DataSetError` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: methods `set_generation` and `candidates_mut` are never used
[INFO] [stderr]   --> src/population.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 22 | impl Population {
[INFO] [stderr]    | --------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 31 |     pub fn set_generation(&mut self, new_generation: usize) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |     pub fn candidates_mut(&mut self) -> &mut HashSet<Candidate> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/population.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         &self,
[INFO] [stderr]    |         ^^^^^ the lifetime is elided here
[INFO] [stderr] 72 |         data_set: &'_ DataSet,
[INFO] [stderr] 73 |     ) -> Result<Vec<CandidateFitness>, FitnessCalculationError> {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 73 |     ) -> Result<Vec<CandidateFitness<'_>>, FitnessCalculationError> {
[INFO] [stderr]    |                                     ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `biocomputation` (bin "biocomputation" test) generated 23 warnings (run `cargo fix --bin "biocomputation" -p biocomputation --tests` to apply 17 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/biocomputation-0f5a37748bbd3c5d)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test dataitem::test::test_non_ascii ... ok
[INFO] [stdout] test dataitem::test::test_num_digits_width ... ok
[INFO] [stdout] test dataitem::test::test_non_digit ... ok
[INFO] [stdout] test dataitem::test::test_binary ... ok
[INFO] [stdout] test dataitem::test::test_one_ignored ... ok
[INFO] [stdout] test dataitem::test::test_char_at ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- dataitem::test::test_char_at stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'dataitem::test::test_char_at' (17) panicked at src/dataitem.rs:172:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: Some('1')
[INFO] [stdout]  right: Some('9')
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x601938422ad2 - std::backtrace_rs::backtrace::libunwind::trace::hff358a60abf734fc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x601938422ad2 - std::backtrace_rs::backtrace::trace_unsynchronized::h3b121f916dd95ec6
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x601938422ad2 - std::sys::backtrace::_print_fmt::hde0a62ded68798e9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x601938422ad2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h93773fc827e3113d
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x60193843363a - core::fmt::rt::Argument::fmt::h01eff69902dad97f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x60193843363a - core::fmt::write::hed7b5c73d82ecb7c
[INFO] [stdout]    6:     0x6019383f1706 - std::io::default_write_fmt::h2f696ff5b8bbaa4b
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x6019383f1706 - std::io::Write::write_fmt::h5e66814db8a9cfce
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x601938401f09 - std::sys::backtrace::BacktraceLock::print::h8b1d6fcc5a56d1a3
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x601938401f09 - std::panicking::default_hook::{{closure}}::h2be84df4f189ae36
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x601938401da1 - std::panicking::default_hook::hf0ea8939246f43a9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x60193828092e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h02d35e3888986252
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x60193828092e - test::test_main_with_exit_callback::{{closure}}::h939640a27d647173
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x601938402182 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hc9df09ff391af3e7
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x601938402182 - std::panicking::panic_with_hook::hb4bd9ac1123582a0
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x601938401fc8 - std::panicking::panic_handler::{{closure}}::hde00dd15f5637fe2
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x6019383fd4f9 - std::sys::backtrace::__rust_end_short_backtrace::hb72197fa777c1785
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x6019383e653d - __rustc[4425a7e20b4c8619]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x60193843c6dc - core::panicking::panic_fmt::ha59b517dd231f4da
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x60193843c593 - core::panicking::assert_failed_inner::h3c3301979dc81b81
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panicking.rs:439:17
[INFO] [stdout]   20:     0x60193827bbe7 - core::panicking::assert_failed::h3d60783b61acf743
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panicking.rs:394:5
[INFO] [stdout]   21:     0x60193825dbd0 - biocomputation::dataitem::test::test_char_at::ha03c42aa0193ebc0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/dataitem.rs:172:9
[INFO] [stdout]   22:     0x60193825dc97 - biocomputation::dataitem::test::test_char_at::{{closure}}::h8f7431fd0df7d849
[INFO] [stdout]                                at /opt/rustwide/workdir/src/dataitem.rs:168:22
[INFO] [stdout]   23:     0x60193825e9e6 - core::ops::function::FnOnce::call_once::heee17a8cf7431890
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x6019382806eb - core::ops::function::FnOnce::call_once::hddb3cd395c36bfbb
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x6019382806eb - test::__rust_begin_short_backtrace::h0b6a7601d9750bfa
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x6019382940fa - test::run_test_in_process::{{closure}}::h444209903f00b347
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x6019382940fa - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hfb3ba8f46e537649
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x6019382940fa - std::panicking::catch_unwind::do_call::h1672a45911fcf9dc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x6019382940fa - std::panicking::catch_unwind::h0fadaee22787a6dd
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x6019382940fa - std::panic::catch_unwind::hc47ad190f2c8e188
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x6019382940fa - test::run_test_in_process::hcd7faaf934f29999
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x6019382940fa - test::run_test::{{closure}}::hddc4550da4871867
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x60193826e554 - test::run_test::{{closure}}::h98ae26689f13ed94
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x60193826e554 - std::sys::backtrace::__rust_begin_short_backtrace::h3ec4d1f21ad44588
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x601938271ef2 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::hd8bf2c73d479939f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x601938271ef2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h3b4248f358af2491
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x601938271ef2 - std::panicking::catch_unwind::do_call::hda10a64f4b8daebe
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x601938271ef2 - std::panicking::catch_unwind::h659e5ee8336ec8c7
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x601938271ef2 - std::panic::catch_unwind::h9d4d66a538912c18
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x601938271ef2 - std::thread::lifecycle::spawn_unchecked::{{closure}}::h7557906bb51d79f1
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x601938271ef2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9e460d1d7fc83d35
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x6019383f878f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h61282da819d64ea9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x6019383f878f - std::sys::thread::unix::Thread::new::thread_start::h982f9ea829d1b5fb
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   44:     0x7187f92abaa4 - <unknown>
[INFO] [stdout]   45:     0x7187f9338a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     dataitem::test::test_char_at
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin biocomputation`
[INFO] running `Command { std: "docker" "inspect" "cb593e4ea704bbd96ee77d7959532829dda5da2c942b5ba3ffc047b60ff52e31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb593e4ea704bbd96ee77d7959532829dda5da2c942b5ba3ffc047b60ff52e31", kill_on_drop: false }`
[INFO] [stdout] cb593e4ea704bbd96ee77d7959532829dda5da2c942b5ba3ffc047b60ff52e31
