[INFO] updating cached repository https://github.com/Qubeo/hello-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }` [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c9be0e677f4ccde4ba9f006f82a8fafd6a373214 [INFO] testing Qubeo/hello-rust/c9be0e677f4ccde4ba9f006f82a8fafd6a373214 against beta-2022-04-10 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQubeo%2Fhello-rust" "/workspace/builds/worker-23/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Qubeo/hello-rust on toolchain beta-2022-04-10 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Qubeo/hello-rust [INFO] finished tweaking git repo https://github.com/Qubeo/hello-rust [INFO] tweaked toml for git repo https://github.com/Qubeo/hello-rust written to /workspace/builds/worker-23/source/Cargo.toml [INFO] crate git repo https://github.com/Qubeo/hello-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] cd6deff74613f0d8803c81aeaab113758886cd18692c9f2bb258b2d8bac0ecc3 [INFO] running `Command { std: "docker" "start" "-a" "cd6deff74613f0d8803c81aeaab113758886cd18692c9f2bb258b2d8bac0ecc3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cd6deff74613f0d8803c81aeaab113758886cd18692c9f2bb258b2d8bac0ecc3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cd6deff74613f0d8803c81aeaab113758886cd18692c9f2bb258b2d8bac0ecc3", kill_on_drop: false }` [INFO] [stdout] cd6deff74613f0d8803c81aeaab113758886cd18692c9f2bb258b2d8bac0ecc3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 4b40eebf5ccf45a865f4a18f45b59fb6a8c0fa8c56d0c19c56cd549ba0a5a1cf [INFO] running `Command { std: "docker" "start" "-a" "4b40eebf5ccf45a865f4a18f45b59fb6a8c0fa8c56d0c19c56cd549ba0a5a1cf", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling proc-macro2 v0.4.24 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling libc v0.2.44 [INFO] [stderr] Compiling ryu v0.2.7 [INFO] [stderr] Compiling serde v1.0.84 [INFO] [stderr] Compiling itoa v0.4.3 [INFO] [stderr] Compiling lazy_static v0.2.11 [INFO] [stderr] Compiling thread-id v3.3.0 [INFO] [stderr] Compiling rand v0.4.3 [INFO] [stderr] Compiling quote v0.6.10 [INFO] [stderr] Compiling syn v0.15.24 [INFO] [stderr] Compiling serde_json v1.0.34 [INFO] [stderr] Compiling serde_derive v1.0.84 [INFO] [stderr] Compiling flame v0.2.2 [INFO] [stderr] Compiling flamer v0.3.0 [INFO] [stderr] Compiling hello-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fmt; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/grid/mod.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Div` [INFO] [stdout] --> src/grid/mod.rs:3:32 [INFO] [stdout] | [INFO] [stdout] 3 | use std::ops::{ Add, Mul, Sub, Div }; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `u32ff` should have an upper camel case name [INFO] [stdout] --> src/grid/mod.rs:21:12 [INFO] [stdout] | [INFO] [stdout] 21 | pub struct u32ff { [INFO] [stdout] | ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `U32ff` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/grid/mod.rs:84:20 [INFO] [stdout] | [INFO] [stdout] 84 | if (i % 3 == 0) { Cell::Alive } else { Cell::Dead } [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 84 - if (i % 3 == 0) { Cell::Alive } else { Cell::Dead } [INFO] [stdout] 84 + if i % 3 == 0 { Cell::Alive } else { Cell::Dead } [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/grid/mod.rs:133:9 [INFO] [stdout] | [INFO] [stdout] 133 | /// @ Q: Complexity: quadratic? [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] 134 | / for i in 1..=self.height-2 { [INFO] [stdout] 135 | | for j in 1..=self.width-2 { [INFO] [stdout] 136 | | let mut count = 0; [INFO] [stdout] 137 | | for n in 0..=2 { [INFO] [stdout] ... | [INFO] [stdout] 145 | | } [INFO] [stdout] 146 | | } [INFO] [stdout] | |_________- rustdoc does not generate documentation for expressions [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: use `//` for a plain comment [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/grid/mod.rs:179:99 [INFO] [stdout] | [INFO] [stdout] 179 | macro_rules! wrp { ( ($xe:expr, $ye:expr) ) => { (self.wrap_x($xe), self.wrap_y($ye)) } }; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition: `wrp` [INFO] [stdout] --> src/grid/mod.rs:179:22 [INFO] [stdout] | [INFO] [stdout] 179 | macro_rules! wrp { ( ($xe:expr, $ye:expr) ) => { (self.wrap_x($xe), self.wrap_y($ye)) } }; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_macros)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/grid/mod.rs:208:9 [INFO] [stdout] | [INFO] [stdout] 208 | ((i % (last_index)) + (last_index) * (i == 0) as u32) // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 208 - ((i % (last_index)) + (last_index) * (i == 0) as u32) // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stdout] 208 + (i % (last_index)) + (last_index) * (i == 0) as u32 // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | for i in 0..=4 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/grid/mod.rs:122:44 [INFO] [stdout] | [INFO] [stdout] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/grid/mod.rs:122:47 [INFO] [stdout] | [INFO] [stdout] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/grid/mod.rs:155:13 [INFO] [stdout] | [INFO] [stdout] 155 | ... let a: () = self.cells.iter_mut().enumerate() // Type () as we don't actually map and use the collected items, we j... [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `count` [INFO] [stdout] --> src/grid/mod.rs:182:17 [INFO] [stdout] | [INFO] [stdout] 182 | let mut count = 0; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_count` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/grid/mod.rs:177:44 [INFO] [stdout] | [INFO] [stdout] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/grid/mod.rs:177:47 [INFO] [stdout] | [INFO] [stdout] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `j` is assigned to, but never used [INFO] [stdout] --> src/grid/mod.rs:216:17 [INFO] [stdout] | [INFO] [stdout] 216 | let mut j: u32 = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_j` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/grid/mod.rs:219:14 [INFO] [stdout] | [INFO] [stdout] 219 | for (i, line) in self.cells.as_slice().chunks(self.width as usize).enumerate() { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/grid/mod.rs:98:13 [INFO] [stdout] | [INFO] [stdout] 98 | let mut nm = self.compute_neighbor_matrix_0(); [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: variable does not need to be mutable [INFO] [stdout] --> src/grid/mod.rs:182:13 [INFO] [stdout] | [INFO] [stdout] 182 | let mut count = 0; [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `tick_fn` [INFO] [stdout] --> src/grid/mod.rs:76:5 [INFO] [stdout] | [INFO] [stdout] 76 | tick_fn: fn(&mut Grid, Vec) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] note: `GridFinite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/grid/mod.rs:71:10 [INFO] [stdout] | [INFO] [stdout] 71 | #[derive(Clone)] // Removed the Debug trait, as it's not implemented for the fn, so the whole struct can't be cast as Debug. [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `render` [INFO] [stdout] --> src/grid/mod.rs:103:12 [INFO] [stdout] | [INFO] [stdout] 103 | pub fn render(&self) -> String { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_x_y` [INFO] [stdout] --> src/grid/mod.rs:115:12 [INFO] [stdout] | [INFO] [stdout] 115 | pub fn get_x_y(&self, index: u32) -> (u32, u32) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `count_alive_neighbors_0` [INFO] [stdout] --> src/grid/mod.rs:122:12 [INFO] [stdout] | [INFO] [stdout] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `tick_neighbor_matrix_0` [INFO] [stdout] --> src/grid/mod.rs:154:8 [INFO] [stdout] | [INFO] [stdout] 154 | fn tick_neighbor_matrix_0(&mut self, alive_neighbor_matrix: Vec) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `count_alive_neighbors_1` [INFO] [stdout] --> src/grid/mod.rs:177:12 [INFO] [stdout] | [INFO] [stdout] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `wrap_x` [INFO] [stdout] --> src/grid/mod.rs:199:8 [INFO] [stdout] | [INFO] [stdout] 199 | fn wrap_x(&self, x: u32) -> u32 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `wrap_y` [INFO] [stdout] --> src/grid/mod.rs:203:8 [INFO] [stdout] | [INFO] [stdout] 203 | fn wrap_y(&self, y: u32) -> u32 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `wrap` [INFO] [stdout] --> src/grid/mod.rs:207:8 [INFO] [stdout] | [INFO] [stdout] 207 | fn wrap(i: u32, last_index: u32) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/grid/mod.rs:222:17 [INFO] [stdout] | [INFO] [stdout] 222 | write!(f, "{:} ", symbol); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 31 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 39.02s [INFO] running `Command { std: "docker" "inspect" "4b40eebf5ccf45a865f4a18f45b59fb6a8c0fa8c56d0c19c56cd549ba0a5a1cf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4b40eebf5ccf45a865f4a18f45b59fb6a8c0fa8c56d0c19c56cd549ba0a5a1cf", kill_on_drop: false }` [INFO] [stdout] 4b40eebf5ccf45a865f4a18f45b59fb6a8c0fa8c56d0c19c56cd549ba0a5a1cf [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] dade19f2c8ba77b30cda23fc8a2287b5b1e3a7ab20a944fca583bbf76ce5c334 [INFO] running `Command { std: "docker" "start" "-a" "dade19f2c8ba77b30cda23fc8a2287b5b1e3a7ab20a944fca583bbf76ce5c334", kill_on_drop: false }` [INFO] [stderr] Compiling hello-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fmt; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/grid/mod.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Div` [INFO] [stdout] --> src/grid/mod.rs:3:32 [INFO] [stdout] | [INFO] [stdout] 3 | use std::ops::{ Add, Mul, Sub, Div }; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `u32ff` should have an upper camel case name [INFO] [stdout] --> src/grid/mod.rs:21:12 [INFO] [stdout] | [INFO] [stdout] 21 | pub struct u32ff { [INFO] [stdout] | ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `U32ff` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/grid/mod.rs:84:20 [INFO] [stdout] | [INFO] [stdout] 84 | if (i % 3 == 0) { Cell::Alive } else { Cell::Dead } [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 84 - if (i % 3 == 0) { Cell::Alive } else { Cell::Dead } [INFO] [stdout] 84 + if i % 3 == 0 { Cell::Alive } else { Cell::Dead } [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/grid/mod.rs:133:9 [INFO] [stdout] | [INFO] [stdout] 133 | /// @ Q: Complexity: quadratic? [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] 134 | / for i in 1..=self.height-2 { [INFO] [stdout] 135 | | for j in 1..=self.width-2 { [INFO] [stdout] 136 | | let mut count = 0; [INFO] [stdout] 137 | | for n in 0..=2 { [INFO] [stdout] ... | [INFO] [stdout] 145 | | } [INFO] [stdout] 146 | | } [INFO] [stdout] | |_________- rustdoc does not generate documentation for expressions [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: use `//` for a plain comment [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/grid/mod.rs:179:99 [INFO] [stdout] | [INFO] [stdout] 179 | macro_rules! wrp { ( ($xe:expr, $ye:expr) ) => { (self.wrap_x($xe), self.wrap_y($ye)) } }; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition: `wrp` [INFO] [stdout] --> src/grid/mod.rs:179:22 [INFO] [stdout] | [INFO] [stdout] 179 | macro_rules! wrp { ( ($xe:expr, $ye:expr) ) => { (self.wrap_x($xe), self.wrap_y($ye)) } }; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_macros)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/grid/mod.rs:208:9 [INFO] [stdout] | [INFO] [stdout] 208 | ((i % (last_index)) + (last_index) * (i == 0) as u32) // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 208 - ((i % (last_index)) + (last_index) * (i == 0) as u32) // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stdout] 208 + (i % (last_index)) + (last_index) * (i == 0) as u32 // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | for i in 0..=4 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/grid/mod.rs:122:44 [INFO] [stdout] | [INFO] [stdout] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/grid/mod.rs:122:47 [INFO] [stdout] | [INFO] [stdout] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/grid/mod.rs:155:13 [INFO] [stdout] | [INFO] [stdout] 155 | ... let a: () = self.cells.iter_mut().enumerate() // Type () as we don't actually map and use the collected items, we j... [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `count` [INFO] [stdout] --> src/grid/mod.rs:182:17 [INFO] [stdout] | [INFO] [stdout] 182 | let mut count = 0; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_count` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/grid/mod.rs:177:44 [INFO] [stdout] | [INFO] [stdout] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/grid/mod.rs:177:47 [INFO] [stdout] | [INFO] [stdout] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `j` is assigned to, but never used [INFO] [stdout] --> src/grid/mod.rs:216:17 [INFO] [stdout] | [INFO] [stdout] 216 | let mut j: u32 = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_j` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/grid/mod.rs:219:14 [INFO] [stdout] | [INFO] [stdout] 219 | for (i, line) in self.cells.as_slice().chunks(self.width as usize).enumerate() { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/grid/mod.rs:98:13 [INFO] [stdout] | [INFO] [stdout] 98 | let mut nm = self.compute_neighbor_matrix_0(); [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: variable does not need to be mutable [INFO] [stdout] --> src/grid/mod.rs:182:13 [INFO] [stdout] | [INFO] [stdout] 182 | let mut count = 0; [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `tick_fn` [INFO] [stdout] --> src/grid/mod.rs:76:5 [INFO] [stdout] | [INFO] [stdout] 76 | tick_fn: fn(&mut Grid, Vec) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] note: `GridFinite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] --> src/grid/mod.rs:71:10 [INFO] [stdout] | [INFO] [stdout] 71 | #[derive(Clone)] // Removed the Debug trait, as it's not implemented for the fn, so the whole struct can't be cast as Debug. [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `render` [INFO] [stdout] --> src/grid/mod.rs:103:12 [INFO] [stdout] | [INFO] [stdout] 103 | pub fn render(&self) -> String { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_x_y` [INFO] [stdout] --> src/grid/mod.rs:115:12 [INFO] [stdout] | [INFO] [stdout] 115 | pub fn get_x_y(&self, index: u32) -> (u32, u32) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `count_alive_neighbors_0` [INFO] [stdout] --> src/grid/mod.rs:122:12 [INFO] [stdout] | [INFO] [stdout] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `tick_neighbor_matrix_0` [INFO] [stdout] --> src/grid/mod.rs:154:8 [INFO] [stdout] | [INFO] [stdout] 154 | fn tick_neighbor_matrix_0(&mut self, alive_neighbor_matrix: Vec) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `count_alive_neighbors_1` [INFO] [stdout] --> src/grid/mod.rs:177:12 [INFO] [stdout] | [INFO] [stdout] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `wrap_x` [INFO] [stdout] --> src/grid/mod.rs:199:8 [INFO] [stdout] | [INFO] [stdout] 199 | fn wrap_x(&self, x: u32) -> u32 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `wrap_y` [INFO] [stdout] --> src/grid/mod.rs:203:8 [INFO] [stdout] | [INFO] [stdout] 203 | fn wrap_y(&self, y: u32) -> u32 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `wrap` [INFO] [stdout] --> src/grid/mod.rs:207:8 [INFO] [stdout] | [INFO] [stdout] 207 | fn wrap(i: u32, last_index: u32) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/grid/mod.rs:222:17 [INFO] [stdout] | [INFO] [stdout] 222 | write!(f, "{:} ", symbol); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 31 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.82s [INFO] [stderr] Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/hello_rust-76814c5090281ea2) [INFO] running `Command { std: "docker" "inspect" "dade19f2c8ba77b30cda23fc8a2287b5b1e3a7ab20a944fca583bbf76ce5c334", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dade19f2c8ba77b30cda23fc8a2287b5b1e3a7ab20a944fca583bbf76ce5c334", kill_on_drop: false }` [INFO] [stdout] dade19f2c8ba77b30cda23fc8a2287b5b1e3a7ab20a944fca583bbf76ce5c334 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] c4b86602cc5fca29c4e37043bd12350bad142d66ff269e8df016060bc03d1f87 [INFO] running `Command { std: "docker" "start" "-a" "c4b86602cc5fca29c4e37043bd12350bad142d66ff269e8df016060bc03d1f87", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] warning: unused import: `std::io` [INFO] [stderr] --> src/main.rs:1:5 [INFO] [stderr] | [INFO] [stderr] 1 | use std::io; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::fmt` [INFO] [stderr] --> src/main.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::fmt; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::io` [INFO] [stderr] --> src/grid/mod.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Div` [INFO] [stderr] --> src/grid/mod.rs:3:32 [INFO] [stderr] | [INFO] [stderr] 3 | use std::ops::{ Add, Mul, Sub, Div }; [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: type `u32ff` should have an upper camel case name [INFO] [stderr] --> src/grid/mod.rs:21:12 [INFO] [stderr] | [INFO] [stderr] 21 | pub struct u32ff { [INFO] [stderr] | ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `U32ff` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around `if` condition [INFO] [stderr] --> src/grid/mod.rs:84:20 [INFO] [stderr] | [INFO] [stderr] 84 | if (i % 3 == 0) { Cell::Alive } else { Cell::Dead } [INFO] [stderr] | ^ ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] 84 - if (i % 3 == 0) { Cell::Alive } else { Cell::Dead } [INFO] [stderr] 84 + if i % 3 == 0 { Cell::Alive } else { Cell::Dead } [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/grid/mod.rs:133:9 [INFO] [stderr] | [INFO] [stderr] 133 | /// @ Q: Complexity: quadratic? [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] 134 | / for i in 1..=self.height-2 { [INFO] [stderr] 135 | | for j in 1..=self.width-2 { [INFO] [stderr] 136 | | let mut count = 0; [INFO] [stderr] 137 | | for n in 0..=2 { [INFO] [stderr] ... | [INFO] [stderr] 145 | | } [INFO] [stderr] 146 | | } [INFO] [stderr] | |_________- rustdoc does not generate documentation for expressions [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stderr] = help: use `//` for a plain comment [INFO] [stderr] [INFO] [stderr] warning: unnecessary trailing semicolon [INFO] [stderr] --> src/grid/mod.rs:179:99 [INFO] [stderr] | [INFO] [stderr] 179 | macro_rules! wrp { ( ($xe:expr, $ye:expr) ) => { (self.wrap_x($xe), self.wrap_y($ye)) } }; [INFO] [stderr] | ^ help: remove this semicolon [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused macro definition: `wrp` [INFO] [stderr] --> src/grid/mod.rs:179:22 [INFO] [stderr] | [INFO] [stderr] 179 | macro_rules! wrp { ( ($xe:expr, $ye:expr) ) => { (self.wrap_x($xe), self.wrap_y($ye)) } }; [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_macros)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around block return value [INFO] [stderr] --> src/grid/mod.rs:208:9 [INFO] [stderr] | [INFO] [stderr] 208 | ((i % (last_index)) + (last_index) * (i == 0) as u32) // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stderr] | ^ ^ [INFO] [stderr] | [INFO] [stderr] help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] 208 - ((i % (last_index)) + (last_index) * (i == 0) as u32) // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stderr] 208 + (i % (last_index)) + (last_index) * (i == 0) as u32 // Q: Optimize "j == 0" with some bitwise operator? [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/main.rs:38:9 [INFO] [stderr] | [INFO] [stderr] 38 | for i in 0..=4 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/grid/mod.rs:122:44 [INFO] [stderr] | [INFO] [stderr] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/grid/mod.rs:122:47 [INFO] [stderr] | [INFO] [stderr] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/grid/mod.rs:155:13 [INFO] [stderr] | [INFO] [stderr] 155 | ... let a: () = self.cells.iter_mut().enumerate() // Type () as we don't actually map and use the collected items, we j... [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `count` [INFO] [stderr] --> src/grid/mod.rs:182:17 [INFO] [stderr] | [INFO] [stderr] 182 | let mut count = 0; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_count` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/grid/mod.rs:177:44 [INFO] [stderr] | [INFO] [stderr] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/grid/mod.rs:177:47 [INFO] [stderr] | [INFO] [stderr] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: variable `j` is assigned to, but never used [INFO] [stderr] --> src/grid/mod.rs:216:17 [INFO] [stderr] | [INFO] [stderr] 216 | let mut j: u32 = 0; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_j` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/grid/mod.rs:219:14 [INFO] [stderr] | [INFO] [stderr] 219 | for (i, line) in self.cells.as_slice().chunks(self.width as usize).enumerate() { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/grid/mod.rs:98:13 [INFO] [stderr] | [INFO] [stderr] 98 | let mut nm = self.compute_neighbor_matrix_0(); [INFO] [stderr] | ----^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/grid/mod.rs:182:13 [INFO] [stderr] | [INFO] [stderr] 182 | let mut count = 0; [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: field is never read: `tick_fn` [INFO] [stderr] --> src/grid/mod.rs:76:5 [INFO] [stderr] | [INFO] [stderr] 76 | tick_fn: fn(&mut Grid, Vec) [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] note: `GridFinite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stderr] --> src/grid/mod.rs:71:10 [INFO] [stderr] | [INFO] [stderr] 71 | #[derive(Clone)] // Removed the Debug trait, as it's not implemented for the fn, so the whole struct can't be cast as Debug. [INFO] [stderr] | ^^^^^ [INFO] [stderr] = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `render` [INFO] [stderr] --> src/grid/mod.rs:103:12 [INFO] [stderr] | [INFO] [stderr] 103 | pub fn render(&self) -> String { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `get_x_y` [INFO] [stderr] --> src/grid/mod.rs:115:12 [INFO] [stderr] | [INFO] [stderr] 115 | pub fn get_x_y(&self, index: u32) -> (u32, u32) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `count_alive_neighbors_0` [INFO] [stderr] --> src/grid/mod.rs:122:12 [INFO] [stderr] | [INFO] [stderr] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `tick_neighbor_matrix_0` [INFO] [stderr] --> src/grid/mod.rs:154:8 [INFO] [stderr] | [INFO] [stderr] 154 | fn tick_neighbor_matrix_0(&mut self, alive_neighbor_matrix: Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `count_alive_neighbors_1` [INFO] [stderr] --> src/grid/mod.rs:177:12 [INFO] [stderr] | [INFO] [stderr] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `wrap_x` [INFO] [stderr] --> src/grid/mod.rs:199:8 [INFO] [stderr] | [INFO] [stderr] 199 | fn wrap_x(&self, x: u32) -> u32 { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `wrap_y` [INFO] [stderr] --> src/grid/mod.rs:203:8 [INFO] [stderr] | [INFO] [stderr] 203 | fn wrap_y(&self, y: u32) -> u32 { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `wrap` [INFO] [stderr] --> src/grid/mod.rs:207:8 [INFO] [stderr] | [INFO] [stderr] 207 | fn wrap(i: u32, last_index: u32) -> u32 { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/grid/mod.rs:222:17 [INFO] [stderr] | [INFO] [stderr] 222 | write!(f, "{:} ", symbol); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: `hello-rust` (bin "hello-rust" test) generated 31 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.29s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hello_rust-76814c5090281ea2) [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" "c4b86602cc5fca29c4e37043bd12350bad142d66ff269e8df016060bc03d1f87", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c4b86602cc5fca29c4e37043bd12350bad142d66ff269e8df016060bc03d1f87", kill_on_drop: false }` [INFO] [stdout] c4b86602cc5fca29c4e37043bd12350bad142d66ff269e8df016060bc03d1f87