[INFO] cloning repository https://github.com/AlfredDU/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlfredDU/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlfredDU%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlfredDU%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec71d154d2b5c8c7f8063335aeac9e99e97158cb
[INFO] testing AlfredDU/learn-rust against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlfredDU%2Flearn-rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AlfredDU/learn-rust
[INFO] finished tweaking git repo https://github.com/AlfredDU/learn-rust
[INFO] tweaked toml for git repo https://github.com/AlfredDU/learn-rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AlfredDU/learn-rust on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AlfredDU/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 869f4ed4b3829284abf7cde98066af2016d50880a0193b0f97037631cde4c756
[INFO] running `Command { std: "docker" "start" "-a" "869f4ed4b3829284abf7cde98066af2016d50880a0193b0f97037631cde4c756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "869f4ed4b3829284abf7cde98066af2016d50880a0193b0f97037631cde4c756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "869f4ed4b3829284abf7cde98066af2016d50880a0193b0f97037631cde4c756", kill_on_drop: false }`
[INFO] [stdout] 869f4ed4b3829284abf7cde98066af2016d50880a0193b0f97037631cde4c756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bf52996e4e1f94d82ab305b746ac4ec9db843d961e56e390b413ec0321847db
[INFO] running `Command { std: "docker" "start" "-a" "0bf52996e4e1f94d82ab305b746ac4ec9db843d961e56e390b413ec0321847db", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/write_textfile.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `FIVE_0`
[INFO] [stdout]   --> src/operator_override.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let FIVE_0 = FiniteFieldElement::<5>{val: 0};
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_FIVE_0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `FIVE_1`
[INFO] [stdout]   --> src/operator_override.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let FIVE_1 = FiniteFieldElement::<5>{val: 1};
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_FIVE_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/hello_world.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/arguments.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/complex.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_string`, `abs`, `arg`, and `to_tri_string` are never used
[INFO] [stdout]   --> src/complex.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 19 |         impl Complex {
[INFO] [stdout]    |         ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |             fn to_string(&self) -> String {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |             fn abs(&self) -> $num_type {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |             fn arg(&self) -> $num_type {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |             fn to_tri_string(&self) -> String {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     complex_define!(u32);
[INFO] [stdout]    |     -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `complex_define` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RGB` is never used
[INFO] [stdout]   --> src/enumeration.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum RGB {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `val` and `to_string` are never used
[INFO] [stdout]   --> src/enumeration.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl RGB {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] 31 |     fn val(&self) -> rgb_color::RGBTuple {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn to_string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/enumeration.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `RGBTuple` is never used
[INFO] [stdout]  --> src/enumeration.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub type RGBTuple = (u8, u8, u8);
[INFO] [stdout]   |              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RED` is never used
[INFO] [stdout]  --> src/enumeration.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub const RED: RGBTuple = (255, 0, 0);
[INFO] [stdout]   |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `GREEN` is never used
[INFO] [stdout]  --> src/enumeration.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub const GREEN: RGBTuple = (0, 255, 0);
[INFO] [stdout]   |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLUE` is never used
[INFO] [stdout]   --> src/enumeration.rs:10:15
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub const BLUE: RGBTuple = (0, 0, 255);
[INFO] [stdout]    |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLACK` is never used
[INFO] [stdout]   --> src/enumeration.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub const BLACK: RGBTuple = (0, 0, 0);
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `WHITE` is never used
[INFO] [stdout]   --> src/enumeration.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub const WHITE: RGBTuple = (255, 255, 255);
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]   --> src/enumeration.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn to_string(rgb: RGBTuple) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Vector2f` is never used
[INFO] [stdout]  --> src/multidimensional_array.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Vector2f = [f64; 2];
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Matrix2x2f` is never used
[INFO] [stdout]  --> src/multidimensional_array.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Matrix2x2f = [Vector2f; 2];
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate` is never used
[INFO] [stdout]  --> src/multidimensional_array.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn rotate(vec: &Vector2f, angle: f64) -> Vector2f {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]   --> src/multidimensional_array.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn to_string(vec: &Vector2f) -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/multidimensional_array.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/operator_override.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TEXT_FILENAME` is never used
[INFO] [stdout]  --> src/read_textfile.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const TEXT_FILENAME: &str = "src/res/GNU通用公共许可协议3.0.txt";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_by_lines` is never used
[INFO] [stdout]   --> src/read_textfile.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn read_by_lines() -> Result<Vec<String>, std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_all` is never used
[INFO] [stdout]   --> src/read_textfile.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn read_all() -> Result<String, std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/read_textfile.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     write_textfile::main();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let _ = write_textfile::main();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_0` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let FIVE_0 = FiniteFieldElement::<5>{val: 0};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_1` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let FIVE_1 = FiniteFieldElement::<5>{val: 1};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_2` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let FIVE_2 = FiniteFieldElement::<5>{val: 2};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_3` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let FIVE_3 = FiniteFieldElement::<5>{val: 3};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_4` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let FIVE_4 = FiniteFieldElement::<5>{val: 4};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "0bf52996e4e1f94d82ab305b746ac4ec9db843d961e56e390b413ec0321847db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bf52996e4e1f94d82ab305b746ac4ec9db843d961e56e390b413ec0321847db", kill_on_drop: false }`
[INFO] [stdout] 0bf52996e4e1f94d82ab305b746ac4ec9db843d961e56e390b413ec0321847db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f712fcac4c419693ef00b9d409993ee2f3809888ba4fb96b7c3f386a00265eac
[INFO] running `Command { std: "docker" "start" "-a" "f712fcac4c419693ef00b9d409993ee2f3809888ba4fb96b7c3f386a00265eac", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/write_textfile.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `FIVE_0`
[INFO] [stdout]   --> src/operator_override.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let FIVE_0 = FiniteFieldElement::<5>{val: 0};
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_FIVE_0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `FIVE_1`
[INFO] [stdout]   --> src/operator_override.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let FIVE_1 = FiniteFieldElement::<5>{val: 1};
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_FIVE_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/hello_world.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/arguments.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/complex.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_string`, `abs`, `arg`, and `to_tri_string` are never used
[INFO] [stdout]   --> src/complex.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 19 |         impl Complex {
[INFO] [stdout]    |         ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |             fn to_string(&self) -> String {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |             fn abs(&self) -> $num_type {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |             fn arg(&self) -> $num_type {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |             fn to_tri_string(&self) -> String {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     complex_define!(u32);
[INFO] [stdout]    |     -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `complex_define` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RGB` is never used
[INFO] [stdout]   --> src/enumeration.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum RGB {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `val` and `to_string` are never used
[INFO] [stdout]   --> src/enumeration.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl RGB {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] 31 |     fn val(&self) -> rgb_color::RGBTuple {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn to_string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/enumeration.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `RGBTuple` is never used
[INFO] [stdout]  --> src/enumeration.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub type RGBTuple = (u8, u8, u8);
[INFO] [stdout]   |              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RED` is never used
[INFO] [stdout]  --> src/enumeration.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub const RED: RGBTuple = (255, 0, 0);
[INFO] [stdout]   |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `GREEN` is never used
[INFO] [stdout]  --> src/enumeration.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub const GREEN: RGBTuple = (0, 255, 0);
[INFO] [stdout]   |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLUE` is never used
[INFO] [stdout]   --> src/enumeration.rs:10:15
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub const BLUE: RGBTuple = (0, 0, 255);
[INFO] [stdout]    |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLACK` is never used
[INFO] [stdout]   --> src/enumeration.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub const BLACK: RGBTuple = (0, 0, 0);
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `WHITE` is never used
[INFO] [stdout]   --> src/enumeration.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub const WHITE: RGBTuple = (255, 255, 255);
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]   --> src/enumeration.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn to_string(rgb: RGBTuple) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Vector2f` is never used
[INFO] [stdout]  --> src/multidimensional_array.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Vector2f = [f64; 2];
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Matrix2x2f` is never used
[INFO] [stdout]  --> src/multidimensional_array.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Matrix2x2f = [Vector2f; 2];
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate` is never used
[INFO] [stdout]  --> src/multidimensional_array.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn rotate(vec: &Vector2f, angle: f64) -> Vector2f {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]   --> src/multidimensional_array.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn to_string(vec: &Vector2f) -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/multidimensional_array.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/operator_override.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TEXT_FILENAME` is never used
[INFO] [stdout]  --> src/read_textfile.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const TEXT_FILENAME: &str = "src/res/GNU通用公共许可协议3.0.txt";
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_by_lines` is never used
[INFO] [stdout]   --> src/read_textfile.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn read_by_lines() -> Result<Vec<String>, std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_all` is never used
[INFO] [stdout]   --> src/read_textfile.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn read_all() -> Result<String, std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/read_textfile.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     write_textfile::main();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let _ = write_textfile::main();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_0` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let FIVE_0 = FiniteFieldElement::<5>{val: 0};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_1` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let FIVE_1 = FiniteFieldElement::<5>{val: 1};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_2` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let FIVE_2 = FiniteFieldElement::<5>{val: 2};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_3` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let FIVE_3 = FiniteFieldElement::<5>{val: 3};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `FIVE_4` should have a snake case name
[INFO] [stdout]   --> src/operator_override.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let FIVE_4 = FiniteFieldElement::<5>{val: 4};
[INFO] [stdout]    |         ^^^^^^ help: convert the identifier to snake case: `five_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "f712fcac4c419693ef00b9d409993ee2f3809888ba4fb96b7c3f386a00265eac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f712fcac4c419693ef00b9d409993ee2f3809888ba4fb96b7c3f386a00265eac", kill_on_drop: false }`
[INFO] [stdout] f712fcac4c419693ef00b9d409993ee2f3809888ba4fb96b7c3f386a00265eac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0e65f1844279f297a41b1a63e374748a35cfac44dc19d2ef98b9d62e52224f73
[INFO] running `Command { std: "docker" "start" "-a" "0e65f1844279f297a41b1a63e374748a35cfac44dc19d2ef98b9d62e52224f73", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::path::PathBuf`
[INFO] [stderr]  --> src/write_textfile.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::path::PathBuf;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `FIVE_0`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/operator_override.rs:76:9
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 76 |     let FIVE_0 = FiniteFieldElement::<5>{val: 0};
[INFO] [stdout] 
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_FIVE_0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `FIVE_1`
[INFO] [stderr]   --> src/operator_override.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 |     let FIVE_1 = FiniteFieldElement::<5>{val: 1};
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_FIVE_1`
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]  --> src/hello_world.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn main() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/arguments.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/complex.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `to_string`, `abs`, `arg`, and `to_tri_string` are never used
[INFO] [stderr]   --> src/complex.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 19 |         impl Complex {
[INFO] [stderr]    |         ------------ methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 22 |             fn to_string(&self) -> String {
[INFO] [stderr]    |                ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 27 |             fn abs(&self) -> $num_type {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] ...
[INFO] [stderr] 32 |             fn arg(&self) -> $num_type {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |             fn to_tri_string(&self) -> String {
[INFO] [stderr]    |                ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 71 |     complex_define!(u32);
[INFO] [stderr]    |     -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `complex_define` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: enum `RGB` is never used
[INFO] [stderr]   --> src/enumeration.rs:21:6
[INFO] [stderr]    |
[INFO] [stderr] 21 | enum RGB {
[INFO] [stderr]    |      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `val` and `to_string` are never used
[INFO] [stderr]   --> src/enumeration.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | impl RGB {
[INFO] [stderr]    | -------- methods in this implementation
[INFO] [stderr] 31 |     fn val(&self) -> rgb_color::RGBTuple {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 42 |     fn to_string(&self) -> String {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/enumeration.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `RGBTuple` is never used
[INFO] [stderr]  --> src/enumeration.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub type RGBTuple = (u8, u8, u8);
[INFO] [stderr]   |              ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `RED` is never used
[INFO] [stderr]  --> src/enumeration.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub const RED: RGBTuple = (255, 0, 0);
[INFO] [stderr]   |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `GREEN` is never used
[INFO] [stderr]  --> src/enumeration.rs:9:15
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub const GREEN: RGBTuple = (0, 255, 0);
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `BLUE` is never used
[INFO] [stderr]   --> src/enumeration.rs:10:15
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub const BLUE: RGBTuple = (0, 0, 255);
[INFO] [stderr]    |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `BLACK` is never used
[INFO] [stderr]   --> src/enumeration.rs:11:15
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub const BLACK: RGBTuple = (0, 0, 0);
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `WHITE` is never used
[INFO] [stderr]   --> src/enumeration.rs:12:15
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub const WHITE: RGBTuple = (255, 255, 255);
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `to_string` is never used
[INFO] [stderr]   --> src/enumeration.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn to_string(rgb: RGBTuple) -> String {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Vector2f` is never used
[INFO] [stderr]  --> src/multidimensional_array.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 | type Vector2f = [f64; 2];
[INFO] [stderr]   |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Matrix2x2f` is never used
[INFO] [stderr]  --> src/multidimensional_array.rs:5:6
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Matrix2x2f = [Vector2f; 2];
[INFO] [stderr]   |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rotate` is never used
[INFO] [stderr]  --> src/multidimensional_array.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn rotate(vec: &Vector2f, angle: f64) -> Vector2f {
[INFO] [stderr]   |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `to_string` is never used
[INFO] [stderr]   --> src/multidimensional_array.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn to_string(vec: &Vector2f) -> String {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/multidimensional_array.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/operator_override.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `TEXT_FILENAME` is never used
[INFO] [stderr]  --> src/read_textfile.rs:8:7
[INFO] [stderr]   |
[INFO] [stderr] 8 | const TEXT_FILENAME: &str = "src/res/GNU通用公共许可协议3.0.txt";
[INFO] [stderr]   |       ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_by_lines` is never used
[INFO] [stderr]   --> src/read_textfile.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn read_by_lines() -> Result<Vec<String>, std::io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_all` is never used
[INFO] [stderr]   --> src/read_textfile.rs:34:4
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn read_all() -> Result<String, std::io::Error> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/read_textfile.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     write_textfile::main();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let _ = write_textfile::main();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: variable `FIVE_0` should have a snake case name
[INFO] [stderr]   --> src/operator_override.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let FIVE_0 = FiniteFieldElement::<5>{val: 0};
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `five_0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `FIVE_1` should have a snake case name
[INFO] [stderr]   --> src/operator_override.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 |     let FIVE_1 = FiniteFieldElement::<5>{val: 1};
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `five_1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `FIVE_2` should have a snake case name
[INFO] [stderr]   --> src/operator_override.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let FIVE_2 = FiniteFieldElement::<5>{val: 2};
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `five_2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `FIVE_3` should have a snake case name
[INFO] [stderr]   --> src/operator_override.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let FIVE_3 = FiniteFieldElement::<5>{val: 3};
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `five_3`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `FIVE_4` should have a snake case name
[INFO] [stderr]   --> src/operator_override.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |     let FIVE_4 = FiniteFieldElement::<5>{val: 4};
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `five_4`
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-rust` (bin "learn-rust" test) generated 33 warnings (run `cargo fix --bin "learn-rust" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learn_rust-a09d120bb31a800f)
[INFO] running `Command { std: "docker" "inspect" "0e65f1844279f297a41b1a63e374748a35cfac44dc19d2ef98b9d62e52224f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e65f1844279f297a41b1a63e374748a35cfac44dc19d2ef98b9d62e52224f73", kill_on_drop: false }`
[INFO] [stdout] 0e65f1844279f297a41b1a63e374748a35cfac44dc19d2ef98b9d62e52224f73
