[INFO] fetching crate genetic 0.2.1...
[INFO] testing genetic-0.2.1 against 1.54.0 for beta-1.55-1
[INFO] extracting crate genetic 0.2.1 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate genetic 0.2.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate genetic 0.2.1
[INFO] finished tweaking crates.io crate genetic 0.2.1
[INFO] tweaked toml for crates.io crate genetic 0.2.1 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ba95bfbd3fa586e81131ad9eacba56eac3eb7fecbe395ae62a62d5c07db57f2
[INFO] running `Command { std: "docker" "start" "-a" "3ba95bfbd3fa586e81131ad9eacba56eac3eb7fecbe395ae62a62d5c07db57f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ba95bfbd3fa586e81131ad9eacba56eac3eb7fecbe395ae62a62d5c07db57f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ba95bfbd3fa586e81131ad9eacba56eac3eb7fecbe395ae62a62d5c07db57f2", kill_on_drop: false }`
[INFO] [stdout] 3ba95bfbd3fa586e81131ad9eacba56eac3eb7fecbe395ae62a62d5c07db57f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 083accff26c634828ba124b61d3d19b9f59a42edf91ffb9ed1b5f195a64b40da
[INFO] running `Command { std: "docker" "start" "-a" "083accff26c634828ba124b61d3d19b9f59a42edf91ffb9ed1b5f195a64b40da", kill_on_drop: false }`
[INFO] [stderr]    Compiling genetic v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |     evaluator: &'a mut Evaluator<T>,
[INFO] [stdout]    |                        ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:23:22
[INFO] [stdout]    |
[INFO] [stdout] 23 |     reproducer: &'b mut Reproducer<T>,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `universe::Universe`
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use universe::Universe;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutation_rate`
[INFO] [stdout]   --> src/lib.rs:63:23
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutation_rate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `population`
[INFO] [stdout]    --> src/lib.rs:131:28
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `population`
[INFO] [stdout]    --> src/lib.rs:150:22
[INFO] [stdout]     |
[INFO] [stdout] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pop_limit`
[INFO] [stdout]   --> src/universe.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pop_limit: usize,
[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: `from_genome`
[INFO] [stdout]   --> src/lib.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn from_genome(genome: &Vec<u8>) -> LittleAnimal {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/lib.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn new() -> NaturalSelection {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/lib.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn new() -> NaturalReproduction {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "083accff26c634828ba124b61d3d19b9f59a42edf91ffb9ed1b5f195a64b40da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "083accff26c634828ba124b61d3d19b9f59a42edf91ffb9ed1b5f195a64b40da", kill_on_drop: false }`
[INFO] [stdout] 083accff26c634828ba124b61d3d19b9f59a42edf91ffb9ed1b5f195a64b40da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b4cd38d4508a1cda9124e9ab00a7f992457b016cfc345f481ff801057022341
[INFO] running `Command { std: "docker" "start" "-a" "4b4cd38d4508a1cda9124e9ab00a7f992457b016cfc345f481ff801057022341", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |     evaluator: &'a mut Evaluator<T>,
[INFO] [stdout]    |                        ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:23:22
[INFO] [stdout]    |
[INFO] [stdout] 23 |     reproducer: &'b mut Reproducer<T>,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `universe::Universe`
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use universe::Universe;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutation_rate`
[INFO] [stdout]   --> src/lib.rs:63:23
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutation_rate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `population`
[INFO] [stdout]    --> src/lib.rs:131:28
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `population`
[INFO] [stdout]    --> src/lib.rs:150:22
[INFO] [stdout]     |
[INFO] [stdout] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pop_limit`
[INFO] [stdout]   --> src/universe.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pop_limit: usize,
[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: `from_genome`
[INFO] [stdout]   --> src/lib.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn from_genome(genome: &Vec<u8>) -> LittleAnimal {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/lib.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn new() -> NaturalSelection {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/lib.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn new() -> NaturalReproduction {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling genetic v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |     evaluator: &'a mut Evaluator<T>,
[INFO] [stdout]    |                        ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:23:22
[INFO] [stdout]    |
[INFO] [stdout] 23 |     reproducer: &'b mut Reproducer<T>,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/universe.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutation_rate`
[INFO] [stdout]   --> src/lib.rs:63:23
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutation_rate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `population`
[INFO] [stdout]    --> src/lib.rs:131:28
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `population`
[INFO] [stdout]    --> src/lib.rs:150:22
[INFO] [stdout]     |
[INFO] [stdout] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pop_limit`
[INFO] [stdout]   --> src/universe.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pop_limit: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "4b4cd38d4508a1cda9124e9ab00a7f992457b016cfc345f481ff801057022341", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b4cd38d4508a1cda9124e9ab00a7f992457b016cfc345f481ff801057022341", kill_on_drop: false }`
[INFO] [stdout] 4b4cd38d4508a1cda9124e9ab00a7f992457b016cfc345f481ff801057022341
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1c7cb10fb7eadf1ff2f3f2930ab324c8ec5a3e5739c23053663aaa5394b9e842
[INFO] running `Command { std: "docker" "start" "-a" "1c7cb10fb7eadf1ff2f3f2930ab324c8ec5a3e5739c23053663aaa5394b9e842", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 |     evaluator: &'a mut Evaluator<T>,
[INFO] [stderr]    |                        ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:23:22
[INFO] [stderr]    |
[INFO] [stderr] 23 |     reproducer: &'b mut Reproducer<T>,
[INFO] [stderr]    |                         ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:33:32
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:33:66
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `universe::Universe`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use universe::Universe;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutation_rate`
[INFO] [stderr]   --> src/lib.rs:63:23
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutation_rate`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:131:28
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:150:22
[INFO] [stderr]     |
[INFO] [stderr] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pop_limit`
[INFO] [stderr]   --> src/universe.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pop_limit: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from_genome`
[INFO] [stderr]   --> src/lib.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn from_genome(genome: &Vec<u8>) -> LittleAnimal {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/lib.rs:123:9
[INFO] [stderr]     |
[INFO] [stderr] 123 |     pub fn new() -> NaturalSelection {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/lib.rs:142:9
[INFO] [stderr]     |
[INFO] [stderr] 142 |     pub fn new() -> NaturalReproduction {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 |     evaluator: &'a mut Evaluator<T>,
[INFO] [stderr]    |                        ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:23:22
[INFO] [stderr]    |
[INFO] [stderr] 23 |     reproducer: &'b mut Reproducer<T>,
[INFO] [stderr]    |                         ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:33:32
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^ help: use `dyn`: `dyn Evaluator<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/universe.rs:33:66
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn new(evaluator: &'a mut Evaluator<T>, reproducer: &'b mut Reproducer<T>) -> Universe<'a, 'b, T> {
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Reproducer<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutation_rate`
[INFO] [stderr]   --> src/lib.rs:63:23
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutation_rate`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:131:28
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:150:22
[INFO] [stderr]     |
[INFO] [stderr] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pop_limit`
[INFO] [stderr]   --> src/universe.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pop_limit: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/genetic-d8b7730c9663f245)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests genetic
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1c7cb10fb7eadf1ff2f3f2930ab324c8ec5a3e5739c23053663aaa5394b9e842", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c7cb10fb7eadf1ff2f3f2930ab324c8ec5a3e5739c23053663aaa5394b9e842", kill_on_drop: false }`
[INFO] [stdout] 1c7cb10fb7eadf1ff2f3f2930ab324c8ec5a3e5739c23053663aaa5394b9e842
