[INFO] cloning repository https://github.com/tectrixer/neat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tectrixer/neat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftectrixer%2Fneat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftectrixer%2Fneat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e038135772d8bac08da7794cc8b03f3137c331f
[INFO] checking tectrixer/neat against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftectrixer%2Fneat" "/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/tectrixer/neat on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tectrixer/neat
[INFO] finished tweaking git repo https://github.com/tectrixer/neat
[INFO] tweaked toml for git repo https://github.com/tectrixer/neat written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/tectrixer/neat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aaa5ea2a697e738fa0d128fa6a7ce715273c99fd1dd3d1651415201a72d73549
[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" "aaa5ea2a697e738fa0d128fa6a7ce715273c99fd1dd3d1651415201a72d73549", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aaa5ea2a697e738fa0d128fa6a7ce715273c99fd1dd3d1651415201a72d73549", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaa5ea2a697e738fa0d128fa6a7ce715273c99fd1dd3d1651415201a72d73549", kill_on_drop: false }`
[INFO] [stdout] aaa5ea2a697e738fa0d128fa6a7ce715273c99fd1dd3d1651415201a72d73549
[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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75ae76a860a140e8b7305d63f848d3f0e6fb7a9e8cb9e92772de5f9385c57f57
[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" "75ae76a860a140e8b7305d63f848d3f0e6fb7a9e8cb9e92772de5f9385c57f57", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking neat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/phenotype.rs:57:26
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn from_genotype(mut genotype: Genotype) -> Phenotype {
[INFO] [stdout]    |                          ----^^^^^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save`
[INFO] [stdout]   --> src/genotype.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn save(&self, filename_option: Option<String>) -> Result<(), GenotypeError> {
[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: `load`
[INFO] [stdout]   --> src/genotype.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn load(filename_option: Option<String>) -> Result<Genotype, GenotypeError> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FileNotFound`
[INFO] [stdout]    --> src/genotype.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     FileNotFound,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FileSystemError`
[INFO] [stdout]    --> src/genotype.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 115 |     FileSystemError,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SerializingError`
[INFO] [stdout]    --> src/genotype.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     SerializingError,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DeserializingError`
[INFO] [stdout]    --> src/genotype.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 |     DeserializingError,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TicTacToeGame`
[INFO] [stdout]  --> src/tictactoe.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct TicTacToeGame {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `X`
[INFO] [stdout]   --> src/tictactoe.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     X,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `O`
[INFO] [stdout]   --> src/tictactoe.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     O,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Empty`
[INFO] [stdout]   --> src/tictactoe.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Empty,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tictactoe.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new() -> TicTacToeGame {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `whos_turn`
[INFO] [stdout]   --> src/tictactoe.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn whos_turn(&self) -> Fields {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_move`
[INFO] [stdout]   --> src/tictactoe.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn make_move(
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `check_winner`
[INFO] [stdout]   --> src/tictactoe.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn check_winner(&mut self, x: usize, y: usize) -> Option<Fields> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `format_board`
[INFO] [stdout]    --> src/tictactoe.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 131 |     pub fn format_board(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FieldNotEmpty`
[INFO] [stdout]    --> src/tictactoe.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 151 |     FieldNotEmpty,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NoEmptyFieldLeft`
[INFO] [stdout]    --> src/tictactoe.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 |     NoEmptyFieldLeft,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NotAValidField`
[INFO] [stdout]    --> src/tictactoe.rs:153:5
[INFO] [stdout]     |
[INFO] [stdout] 153 |     NotAValidField,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/phenotype.rs:57:26
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn from_genotype(mut genotype: Genotype) -> Phenotype {
[INFO] [stdout]    |                          ----^^^^^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save`
[INFO] [stdout]   --> src/genotype.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn save(&self, filename_option: Option<String>) -> Result<(), GenotypeError> {
[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: `load`
[INFO] [stdout]   --> src/genotype.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn load(filename_option: Option<String>) -> Result<Genotype, GenotypeError> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FileNotFound`
[INFO] [stdout]    --> src/genotype.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     FileNotFound,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FileSystemError`
[INFO] [stdout]    --> src/genotype.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 115 |     FileSystemError,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SerializingError`
[INFO] [stdout]    --> src/genotype.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     SerializingError,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DeserializingError`
[INFO] [stdout]    --> src/genotype.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 |     DeserializingError,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TicTacToeGame`
[INFO] [stdout]  --> src/tictactoe.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct TicTacToeGame {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `X`
[INFO] [stdout]   --> src/tictactoe.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     X,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `O`
[INFO] [stdout]   --> src/tictactoe.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     O,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Empty`
[INFO] [stdout]   --> src/tictactoe.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Empty,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/tictactoe.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new() -> TicTacToeGame {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `whos_turn`
[INFO] [stdout]   --> src/tictactoe.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn whos_turn(&self) -> Fields {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_move`
[INFO] [stdout]   --> src/tictactoe.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn make_move(
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `check_winner`
[INFO] [stdout]   --> src/tictactoe.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn check_winner(&mut self, x: usize, y: usize) -> Option<Fields> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `format_board`
[INFO] [stdout]    --> src/tictactoe.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 131 |     pub fn format_board(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FieldNotEmpty`
[INFO] [stdout]    --> src/tictactoe.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 151 |     FieldNotEmpty,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NoEmptyFieldLeft`
[INFO] [stdout]    --> src/tictactoe.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 |     NoEmptyFieldLeft,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NotAValidField`
[INFO] [stdout]    --> src/tictactoe.rs:153:5
[INFO] [stdout]     |
[INFO] [stdout] 153 |     NotAValidField,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.31s
[INFO] running `Command { std: "docker" "inspect" "75ae76a860a140e8b7305d63f848d3f0e6fb7a9e8cb9e92772de5f9385c57f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75ae76a860a140e8b7305d63f848d3f0e6fb7a9e8cb9e92772de5f9385c57f57", kill_on_drop: false }`
[INFO] [stdout] 75ae76a860a140e8b7305d63f848d3f0e6fb7a9e8cb9e92772de5f9385c57f57