[INFO] updating cached repository Qubeo/hello-rust [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/Qubeo/hello-rust [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/Qubeo/hello-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/Qubeo/hello-rust"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Qubeo/hello-rust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/Qubeo/hello-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Qubeo/hello-rust"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Qubeo/hello-rust'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] c9be0e677f4ccde4ba9f006f82a8fafd6a373214 [INFO] sha for GitHub repo Qubeo/hello-rust: c9be0e677f4ccde4ba9f006f82a8fafd6a373214 [INFO] validating manifest of Qubeo/hello-rust on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of Qubeo/hello-rust on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing Qubeo/hello-rust [INFO] finished frobbing Qubeo/hello-rust [INFO] frobbed toml for Qubeo/hello-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/Qubeo/hello-rust/Cargo.toml [INFO] started frobbing Qubeo/hello-rust [INFO] finished frobbing Qubeo/hello-rust [INFO] frobbed toml for Qubeo/hello-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Qubeo/hello-rust/Cargo.toml [INFO] crate Qubeo/hello-rust already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing Qubeo/hello-rust against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Qubeo/hello-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"` [INFO] [stdout] 38f5a1231f24059d64dd62548399cb7eaa1bbe504ca42cf9839b22a37083bc59 [INFO] running `"docker" "start" "-a" "38f5a1231f24059d64dd62548399cb7eaa1bbe504ca42cf9839b22a37083bc59"` [INFO] [stderr] Compiling serde_json v1.0.34 [INFO] [stderr] Compiling thread-id v3.3.0 [INFO] [stderr] Compiling syn v0.15.24 [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/crater/workdir) [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] [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: `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] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused macro definition [INFO] [stderr] --> src/grid/mod.rs:179:9 [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: unused variable: `i` [INFO] [stderr] --> src/main.rs:38:9 [INFO] [stderr] | [INFO] [stderr] 38 | for i in 0..=4 { [INFO] [stderr] | ^ help: consider prefixing 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: consider prefixing 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: consider prefixing 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 just change the *cell. [INFO] [stderr] | ^ help: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: method is never used: `render` [INFO] [stderr] --> src/grid/mod.rs:103:5 [INFO] [stderr] | [INFO] [stderr] 103 | pub fn render(&self) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `get_x_y` [INFO] [stderr] --> src/grid/mod.rs:115:5 [INFO] [stderr] | [INFO] [stderr] 115 | pub fn get_x_y(&self, index: u32) -> (u32, u32) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count_alive_neighbors_0` [INFO] [stderr] --> src/grid/mod.rs:122:5 [INFO] [stderr] | [INFO] [stderr] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `tick_neighbor_matrix_0` [INFO] [stderr] --> src/grid/mod.rs:154:5 [INFO] [stderr] | [INFO] [stderr] 154 | fn tick_neighbor_matrix_0(&mut self, alive_neighbor_matrix: Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count_alive_neighbors_1` [INFO] [stderr] --> src/grid/mod.rs:177:5 [INFO] [stderr] | [INFO] [stderr] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `wrap_x` [INFO] [stderr] --> src/grid/mod.rs:199:5 [INFO] [stderr] | [INFO] [stderr] 199 | fn wrap_x(&self, x: u32) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `wrap_y` [INFO] [stderr] --> src/grid/mod.rs:203:5 [INFO] [stderr] | [INFO] [stderr] 203 | fn wrap_y(&self, y: u32) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `wrap` [INFO] [stderr] --> src/grid/mod.rs:207:5 [INFO] [stderr] | [INFO] [stderr] 207 | fn wrap(i: u32, last_index: u32) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::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 a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 50.33s [INFO] running `"docker" "inspect" "38f5a1231f24059d64dd62548399cb7eaa1bbe504ca42cf9839b22a37083bc59"` [INFO] running `"docker" "rm" "-f" "38f5a1231f24059d64dd62548399cb7eaa1bbe504ca42cf9839b22a37083bc59"` [INFO] [stdout] 38f5a1231f24059d64dd62548399cb7eaa1bbe504ca42cf9839b22a37083bc59 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Qubeo/hello-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"` [INFO] [stdout] 2f0c4f7dd71e4d70162621aab07b5e3e7d71f1ae17920aff32ac94977daeab9b [INFO] running `"docker" "start" "-a" "2f0c4f7dd71e4d70162621aab07b5e3e7d71f1ae17920aff32ac94977daeab9b"` [INFO] [stderr] Compiling hello-rust v0.1.0 (/opt/crater/workdir) [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] [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: `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] | ^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused macro definition [INFO] [stderr] --> src/grid/mod.rs:179:9 [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: unused variable: `i` [INFO] [stderr] --> src/main.rs:38:9 [INFO] [stderr] | [INFO] [stderr] 38 | for i in 0..=4 { [INFO] [stderr] | ^ help: consider prefixing 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: consider prefixing 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: consider prefixing 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 just change the *cell. [INFO] [stderr] | ^ help: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing 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: method is never used: `render` [INFO] [stderr] --> src/grid/mod.rs:103:5 [INFO] [stderr] | [INFO] [stderr] 103 | pub fn render(&self) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `get_x_y` [INFO] [stderr] --> src/grid/mod.rs:115:5 [INFO] [stderr] | [INFO] [stderr] 115 | pub fn get_x_y(&self, index: u32) -> (u32, u32) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count_alive_neighbors_0` [INFO] [stderr] --> src/grid/mod.rs:122:5 [INFO] [stderr] | [INFO] [stderr] 122 | pub fn count_alive_neighbors_0(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `tick_neighbor_matrix_0` [INFO] [stderr] --> src/grid/mod.rs:154:5 [INFO] [stderr] | [INFO] [stderr] 154 | fn tick_neighbor_matrix_0(&mut self, alive_neighbor_matrix: Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count_alive_neighbors_1` [INFO] [stderr] --> src/grid/mod.rs:177:5 [INFO] [stderr] | [INFO] [stderr] 177 | pub fn count_alive_neighbors_1(&self, (x, y): (u32, u32)) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `wrap_x` [INFO] [stderr] --> src/grid/mod.rs:199:5 [INFO] [stderr] | [INFO] [stderr] 199 | fn wrap_x(&self, x: u32) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `wrap_y` [INFO] [stderr] --> src/grid/mod.rs:203:5 [INFO] [stderr] | [INFO] [stderr] 203 | fn wrap_y(&self, y: u32) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `wrap` [INFO] [stderr] --> src/grid/mod.rs:207:5 [INFO] [stderr] | [INFO] [stderr] 207 | fn wrap(i: u32, last_index: u32) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::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 a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.89s [INFO] running `"docker" "inspect" "2f0c4f7dd71e4d70162621aab07b5e3e7d71f1ae17920aff32ac94977daeab9b"` [INFO] running `"docker" "rm" "-f" "2f0c4f7dd71e4d70162621aab07b5e3e7d71f1ae17920aff32ac94977daeab9b"` [INFO] [stdout] 2f0c4f7dd71e4d70162621aab07b5e3e7d71f1ae17920aff32ac94977daeab9b [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Qubeo/hello-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"` [INFO] [stdout] ef0c969c5f5e1d69341270e20210f56e687f30f7b260c32365eab9aa9c196eaf [INFO] running `"docker" "start" "-a" "ef0c969c5f5e1d69341270e20210f56e687f30f7b260c32365eab9aa9c196eaf"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running /opt/crater/target/debug/deps/hello_rust-8e14d4052ecdffb3 [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 [INFO] [stdout] [INFO] running `"docker" "inspect" "ef0c969c5f5e1d69341270e20210f56e687f30f7b260c32365eab9aa9c196eaf"` [INFO] running `"docker" "rm" "-f" "ef0c969c5f5e1d69341270e20210f56e687f30f7b260c32365eab9aa9c196eaf"` [INFO] [stdout] ef0c969c5f5e1d69341270e20210f56e687f30f7b260c32365eab9aa9c196eaf