Dec 06 13:14:41.025 INFO testing ICimpoes/rusty-train against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 13:14:41.025 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 13:14:41.220 INFO [stdout] 307904281ee4f1767969d8aa16eb25af6ebab0e82937fb59ee374048348c930e
Dec 06 13:14:41.222 INFO running `"docker" "start" "-a" "307904281ee4f1767969d8aa16eb25af6ebab0e82937fb59ee374048348c930e"`
Dec 06 13:14:41.605 INFO [stderr] usermod: no changes
Dec 06 13:14:41.643 INFO [stderr]    Compiling rusty-train v0.1.0 (/source)
Dec 06 13:14:42.027 INFO [stderr] warning: function is never used: `middle_function`
Dec 06 13:14:42.027 INFO [stderr]  --> src/communicator/lib/mod.rs:6:5
Dec 06 13:14:42.027 INFO [stderr]   |
Dec 06 13:14:42.028 INFO [stderr] 6 |     pub fn middle_function() {
Dec 06 13:14:42.028 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:42.028 INFO [stderr]   |
Dec 06 13:14:42.028 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 13:14:42.028 INFO [stderr] 
Dec 06 13:14:42.029 INFO [stderr] warning: function is never used: `middle_secret_function`
Dec 06 13:14:42.029 INFO [stderr]   --> src/communicator/lib/mod.rs:10:5
Dec 06 13:14:42.029 INFO [stderr]    |
Dec 06 13:14:42.029 INFO [stderr] 10 |     fn middle_secret_function() {
Dec 06 13:14:42.029 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:42.029 INFO [stderr] 
Dec 06 13:14:42.029 INFO [stderr] warning: function is never used: `inner_function`
Dec 06 13:14:42.029 INFO [stderr]   --> src/communicator/lib/mod.rs:17:9
Dec 06 13:14:42.029 INFO [stderr]    |
Dec 06 13:14:42.029 INFO [stderr] 17 |         pub fn inner_function() {}
Dec 06 13:14:42.029 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:42.029 INFO [stderr] 
Dec 06 13:14:42.029 INFO [stderr] warning: function is never used: `secret_function`
Dec 06 13:14:42.029 INFO [stderr]   --> src/communicator/lib/mod.rs:19:9
Dec 06 13:14:42.029 INFO [stderr]    |
Dec 06 13:14:42.029 INFO [stderr] 19 |         fn secret_function() {
Dec 06 13:14:42.029 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:42.029 INFO [stderr] 
Dec 06 13:14:42.029 INFO [stderr] warning: function is never used: `inner_function`
Dec 06 13:14:42.029 INFO [stderr]   --> src/communicator/lib/mod.rs:26:13
Dec 06 13:14:42.029 INFO [stderr]    |
Dec 06 13:14:42.029 INFO [stderr] 26 |             pub fn inner_function() {
Dec 06 13:14:42.029 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:42.029 INFO [stderr] 
Dec 06 13:14:42.029 INFO [stderr] warning: function is never used: `try_me`
Dec 06 13:14:42.029 INFO [stderr]   --> src/communicator/lib/mod.rs:56:1
Dec 06 13:14:42.029 INFO [stderr]    |
Dec 06 13:14:42.029 INFO [stderr] 56 | fn try_me() {
Dec 06 13:14:42.030 INFO [stderr]    | ^^^^^^^^^^^
Dec 06 13:14:42.030 INFO [stderr] 
Dec 06 13:14:42.030 INFO [stderr] warning: function is never used: `prints_and_returns_10`
Dec 06 13:14:42.030 INFO [stderr]   --> src/communicator/lib/mod.rs:89:1
Dec 06 13:14:42.030 INFO [stderr]    |
Dec 06 13:14:42.030 INFO [stderr] 89 | fn prints_and_returns_10(a: i32) -> i32 {
Dec 06 13:14:42.030 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:42.030 INFO [stderr] 
Dec 06 13:14:43.096 INFO [stderr] warning: unused variable: `black`
Dec 06 13:14:43.096 INFO [stderr]   --> src/chapter5/bin/main.rs:23:9
Dec 06 13:14:43.096 INFO [stderr]    |
Dec 06 13:14:43.096 INFO [stderr] 23 |     let black = Color(0, 0, 0);
Dec 06 13:14:43.096 INFO [stderr]    |         ^^^^^ help: consider using `_black` instead
Dec 06 13:14:43.096 INFO [stderr]    |
Dec 06 13:14:43.096 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 13:14:43.096 INFO [stderr] 
Dec 06 13:14:43.096 INFO [stderr] warning: unused variable: `origin`
Dec 06 13:14:43.096 INFO [stderr]   --> src/chapter5/bin/main.rs:24:9
Dec 06 13:14:43.096 INFO [stderr]    |
Dec 06 13:14:43.096 INFO [stderr] 24 |     let origin = Point(0, 0, 0);
Dec 06 13:14:43.096 INFO [stderr]    |         ^^^^^^ help: consider using `_origin` instead
Dec 06 13:14:43.096 INFO [stderr] 
Dec 06 13:14:43.147 INFO [stderr] warning: function is never used: `build_user`
Dec 06 13:14:43.147 INFO [stderr]    --> src/chapter5/bin/main.rs:103:1
Dec 06 13:14:43.147 INFO [stderr]     |
Dec 06 13:14:43.147 INFO [stderr] 103 | fn build_user(email: String, username: String) -> User {
Dec 06 13:14:43.147 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.147 INFO [stderr]     |
Dec 06 13:14:43.147 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 06 13:14:43.147 INFO [stderr] 
Dec 06 13:14:43.156 INFO [stderr] warning: unused variable: `ip_type`
Dec 06 13:14:43.156 INFO [stderr]  --> src/chapter6/bin/main.rs:1:10
Dec 06 13:14:43.156 INFO [stderr]   |
Dec 06 13:14:43.156 INFO [stderr] 1 | fn route(ip_type: IpAddrKind) { }
Dec 06 13:14:43.156 INFO [stderr]   |          ^^^^^^^ help: consider using `_ip_type` instead
Dec 06 13:14:43.156 INFO [stderr]   |
Dec 06 13:14:43.156 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:43.156 INFO [stderr] 
Dec 06 13:14:43.156 INFO [stderr] warning: unused variable: `x`
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:32:35
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 32 |     let x = some_string.and_then(|x: &str| Some("sf"));
Dec 06 13:14:43.157 INFO [stderr]    |                                   ^ help: consider using `_x` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: unused variable: `six`
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:11:9
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 11 |     let six = IpAddrKind::V6;
Dec 06 13:14:43.157 INFO [stderr]    |         ^^^ help: consider using `_six` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: unused variable: `home`
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:18:9
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 18 |     let home = IpAddr::V4(String::from("127.0.0.1"));
Dec 06 13:14:43.157 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: unused variable: `loopback`
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:19:9
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 19 |     let loopback = IpAddr::V6(String::from("::1"));
Dec 06 13:14:43.157 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: unused variable: `home`
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:21:9
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 21 |     let home = IpAddr2::V4(127, 0, 0, 1);
Dec 06 13:14:43.157 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: unused variable: `loopback`
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:22:9
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 22 |     let loopback = IpAddr2::V6(String::from("::1"));
Dec 06 13:14:43.157 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: variable `count` is assigned to, but never used
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:72:13
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 72 |     let mut count = 0;
Dec 06 13:14:43.157 INFO [stderr]    |             ^^^^^
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr]    = note: consider using `_count` instead
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.157 INFO [stderr] warning: value assigned to `count` is never read
Dec 06 13:14:43.157 INFO [stderr]   --> src/chapter6/bin/main.rs:76:9
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr] 76 |         count += 1;
Dec 06 13:14:43.157 INFO [stderr]    |         ^^^^^
Dec 06 13:14:43.157 INFO [stderr]    |
Dec 06 13:14:43.157 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 13:14:43.157 INFO [stderr] 
Dec 06 13:14:43.211 INFO [stderr] warning: variant is never constructed: `Quit`
Dec 06 13:14:43.211 INFO [stderr]   --> src/chapter6/bin/main.rs:94:5
Dec 06 13:14:43.211 INFO [stderr]    |
Dec 06 13:14:43.211 INFO [stderr] 94 |     Quit,
Dec 06 13:14:43.211 INFO [stderr]    |     ^^^^
Dec 06 13:14:43.211 INFO [stderr]    |
Dec 06 13:14:43.211 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:43.211 INFO [stderr] 
Dec 06 13:14:43.211 INFO [stderr] warning: variant is never constructed: `Move`
Dec 06 13:14:43.211 INFO [stderr]   --> src/chapter6/bin/main.rs:95:5
Dec 06 13:14:43.211 INFO [stderr]    |
Dec 06 13:14:43.211 INFO [stderr] 95 |     Move { x: i32, y: i32 },
Dec 06 13:14:43.211 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.211 INFO [stderr] 
Dec 06 13:14:43.212 INFO [stderr] warning: variant is never constructed: `ChangeColor`
Dec 06 13:14:43.212 INFO [stderr]   --> src/chapter6/bin/main.rs:97:5
Dec 06 13:14:43.212 INFO [stderr]    |
Dec 06 13:14:43.212 INFO [stderr] 97 |     ChangeColor(i32, i32, i32),
Dec 06 13:14:43.212 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.212 INFO [stderr] 
Dec 06 13:14:43.212 INFO [stderr] warning: variant is never constructed: `Alaska`
Dec 06 13:14:43.212 INFO [stderr]    --> src/chapter6/bin/main.rs:115:5
Dec 06 13:14:43.212 INFO [stderr]     |
Dec 06 13:14:43.212 INFO [stderr] 115 |     Alaska,
Dec 06 13:14:43.212 INFO [stderr]     |     ^^^^^^
Dec 06 13:14:43.212 INFO [stderr] 
Dec 06 13:14:43.212 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 06 13:14:43.212 INFO [stderr]    --> src/chapter6/bin/main.rs:121:5
Dec 06 13:14:43.212 INFO [stderr]     |
Dec 06 13:14:43.212 INFO [stderr] 121 |     Nickel,
Dec 06 13:14:43.212 INFO [stderr]     |     ^^^^^^
Dec 06 13:14:43.212 INFO [stderr] 
Dec 06 13:14:43.316 INFO [stderr] warning: unused variable: `s`
Dec 06 13:14:43.316 INFO [stderr]  --> src/lifetimes/bin/main.rs:5:13
Dec 06 13:14:43.316 INFO [stderr]   |
Dec 06 13:14:43.316 INFO [stderr] 5 |         let s: &'static str = "asdsa";
Dec 06 13:14:43.316 INFO [stderr]   |             ^ help: consider using `_s` instead
Dec 06 13:14:43.316 INFO [stderr]   |
Dec 06 13:14:43.316 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:43.316 INFO [stderr] 
Dec 06 13:14:43.316 INFO [stderr] warning: unused variable: `y`
Dec 06 13:14:43.316 INFO [stderr]   --> src/lifetimes/bin/main.rs:40:29
Dec 06 13:14:43.316 INFO [stderr]    |
Dec 06 13:14:43.316 INFO [stderr] 40 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str {
Dec 06 13:14:43.316 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 06 13:14:43.316 INFO [stderr] 
Dec 06 13:14:43.316 INFO [stderr] warning: unused variable: `y`
Dec 06 13:14:43.316 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:29
Dec 06 13:14:43.316 INFO [stderr]    |
Dec 06 13:14:43.316 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 06 13:14:43.316 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 06 13:14:43.316 INFO [stderr] 
Dec 06 13:14:43.332 INFO [stderr] warning: unused variable: `black`
Dec 06 13:14:43.332 INFO [stderr]    --> src/chapter3/bin/main.rs:107:9
Dec 06 13:14:43.332 INFO [stderr]     |
Dec 06 13:14:43.332 INFO [stderr] 107 |     let black = Color(0, 0, 0);
Dec 06 13:14:43.332 INFO [stderr]     |         ^^^^^ help: consider using `_black` instead
Dec 06 13:14:43.332 INFO [stderr]     |
Dec 06 13:14:43.332 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 06 13:14:43.332 INFO [stderr] 
Dec 06 13:14:43.332 INFO [stderr] warning: unused variable: `origin`
Dec 06 13:14:43.332 INFO [stderr]    --> src/chapter3/bin/main.rs:108:9
Dec 06 13:14:43.332 INFO [stderr]     |
Dec 06 13:14:43.332 INFO [stderr] 108 |     let origin = Point(0, 0, 0);
Dec 06 13:14:43.332 INFO [stderr]     |         ^^^^^^ help: consider using `_origin` instead
Dec 06 13:14:43.332 INFO [stderr] 
Dec 06 13:14:43.380 INFO [stderr] warning: function is never used: `longest3`
Dec 06 13:14:43.380 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:1
Dec 06 13:14:43.380 INFO [stderr]    |
Dec 06 13:14:43.380 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 06 13:14:43.380 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.380 INFO [stderr]    |
Dec 06 13:14:43.380 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:43.380 INFO [stderr] 
Dec 06 13:14:43.380 INFO [stderr] warning: field is never used: `a`
Dec 06 13:14:43.380 INFO [stderr]   --> src/lifetimes/bin/main.rs:50:5
Dec 06 13:14:43.380 INFO [stderr]    |
Dec 06 13:14:43.380 INFO [stderr] 50 |     a: String,
Dec 06 13:14:43.380 INFO [stderr]    |     ^^^^^^^^^
Dec 06 13:14:43.380 INFO [stderr] 
Dec 06 13:14:43.380 INFO [stderr] warning: method is never used: `level`
Dec 06 13:14:43.380 INFO [stderr]   --> src/lifetimes/bin/main.rs:54:5
Dec 06 13:14:43.381 INFO [stderr]    |
Dec 06 13:14:43.381 INFO [stderr] 54 |     fn level(&self) -> i32 {
Dec 06 13:14:43.381 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.381 INFO [stderr] 
Dec 06 13:14:43.381 INFO [stderr] warning: method is never used: `a`
Dec 06 13:14:43.381 INFO [stderr]   --> src/lifetimes/bin/main.rs:60:5
Dec 06 13:14:43.381 INFO [stderr]    |
Dec 06 13:14:43.381 INFO [stderr] 60 |     fn a(&self) -> &str {
Dec 06 13:14:43.381 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.381 INFO [stderr] 
Dec 06 13:14:43.381 INFO [stderr] warning: function is never used: `longest_with_an_announcement`
Dec 06 13:14:43.381 INFO [stderr]   --> src/lifetimes/bin/main.rs:67:1
Dec 06 13:14:43.381 INFO [stderr]    |
Dec 06 13:14:43.381 INFO [stderr] 67 | / fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
Dec 06 13:14:43.381 INFO [stderr] 68 | |     where T: Display
Dec 06 13:14:43.381 INFO [stderr] 69 | | {
Dec 06 13:14:43.381 INFO [stderr] 70 | |     println!("Announcement! {}", ann);
Dec 06 13:14:43.381 INFO [stderr] ...  |
Dec 06 13:14:43.381 INFO [stderr] 75 | |     }
Dec 06 13:14:43.381 INFO [stderr] 76 | | }
Dec 06 13:14:43.381 INFO [stderr]    | |_^
Dec 06 13:14:43.381 INFO [stderr] 
Dec 06 13:14:43.413 INFO [stderr] warning: function is never used: `gives_ownership`
Dec 06 13:14:43.413 INFO [stderr]    --> src/chapter3/bin/main.rs:119:1
Dec 06 13:14:43.413 INFO [stderr]     |
Dec 06 13:14:43.413 INFO [stderr] 119 | fn gives_ownership() -> String {
Dec 06 13:14:43.413 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.413 INFO [stderr]     |
Dec 06 13:14:43.413 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 06 13:14:43.413 INFO [stderr] 
Dec 06 13:14:43.413 INFO [stderr] warning: function is never used: `takes_and_gives_back`
Dec 06 13:14:43.413 INFO [stderr]    --> src/chapter3/bin/main.rs:124:1
Dec 06 13:14:43.413 INFO [stderr]     |
Dec 06 13:14:43.413 INFO [stderr] 124 | fn takes_and_gives_back(a_string: String) -> String {
Dec 06 13:14:43.413 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.413 INFO [stderr] 
Dec 06 13:14:43.413 INFO [stderr] warning: function is never used: `no_dangle`
Dec 06 13:14:43.413 INFO [stderr]    --> src/chapter3/bin/main.rs:149:1
Dec 06 13:14:43.413 INFO [stderr]     |
Dec 06 13:14:43.413 INFO [stderr] 149 | fn no_dangle() -> String {
Dec 06 13:14:43.413 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.413 INFO [stderr] 
Dec 06 13:14:43.413 INFO [stderr] warning: function is never used: `build_user`
Dec 06 13:14:43.413 INFO [stderr]    --> src/chapter3/bin/main.rs:187:1
Dec 06 13:14:43.413 INFO [stderr]     |
Dec 06 13:14:43.413 INFO [stderr] 187 | fn build_user(email: String, username: String) -> User {
Dec 06 13:14:43.413 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.413 INFO [stderr] 
Dec 06 13:14:43.528 INFO [stderr] warning: unused imports: `Red`, `Yellow`
Dec 06 13:14:43.528 INFO [stderr]  --> src/chapter7/bin/main.rs:3:34
Dec 06 13:14:43.528 INFO [stderr]   |
Dec 06 13:14:43.528 INFO [stderr] 3 | use communicator::TrafficLight::{Red, Yellow};
Dec 06 13:14:43.528 INFO [stderr]   |                                  ^^^  ^^^^^^
Dec 06 13:14:43.528 INFO [stderr]   |
Dec 06 13:14:43.528 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 06 13:14:43.528 INFO [stderr] 
Dec 06 13:14:43.609 INFO [stderr] warning: unused variable: `red`
Dec 06 13:14:43.609 INFO [stderr]  --> src/chapter7/bin/main.rs:8:9
Dec 06 13:14:43.609 INFO [stderr]   |
Dec 06 13:14:43.609 INFO [stderr] 8 |     let red = Red;
Dec 06 13:14:43.609 INFO [stderr]   |         ^^^ help: consider using `_red` instead
Dec 06 13:14:43.609 INFO [stderr]   |
Dec 06 13:14:43.609 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:43.609 INFO [stderr] 
Dec 06 13:14:43.609 INFO [stderr] warning: unused variable: `yellow`
Dec 06 13:14:43.609 INFO [stderr]  --> src/chapter7/bin/main.rs:9:9
Dec 06 13:14:43.610 INFO [stderr]   |
Dec 06 13:14:43.610 INFO [stderr] 9 |     let yellow = Yellow;
Dec 06 13:14:43.610 INFO [stderr]   |         ^^^^^^ help: consider using `_yellow` instead
Dec 06 13:14:43.610 INFO [stderr] 
Dec 06 13:14:43.610 INFO [stderr] warning: unused variable: `green`
Dec 06 13:14:43.610 INFO [stderr]   --> src/chapter7/bin/main.rs:10:9
Dec 06 13:14:43.610 INFO [stderr]    |
Dec 06 13:14:43.610 INFO [stderr] 10 |     let green = communicator::TrafficLight::Green;
Dec 06 13:14:43.610 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 06 13:14:43.610 INFO [stderr] 
Dec 06 13:14:43.610 INFO [stderr] warning: unused variable: `green`
Dec 06 13:14:43.610 INFO [stderr]   --> src/chapter7/bin/main.rs:14:9
Dec 06 13:14:43.610 INFO [stderr]    |
Dec 06 13:14:43.610 INFO [stderr] 14 |     let green = Green;
Dec 06 13:14:43.610 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 06 13:14:43.610 INFO [stderr] 
Dec 06 13:14:43.857 INFO [stderr] warning: unused variable: `t`
Dec 06 13:14:43.857 INFO [stderr]   --> src/traits/bin/main.rs:83:24
Dec 06 13:14:43.857 INFO [stderr]    |
Dec 06 13:14:43.857 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 06 13:14:43.857 INFO [stderr]    |                        ^ help: consider using `_t` instead
Dec 06 13:14:43.857 INFO [stderr]    |
Dec 06 13:14:43.857 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 13:14:43.857 INFO [stderr] 
Dec 06 13:14:43.857 INFO [stderr] warning: unused variable: `u`
Dec 06 13:14:43.858 INFO [stderr]   --> src/traits/bin/main.rs:83:30
Dec 06 13:14:43.858 INFO [stderr]    |
Dec 06 13:14:43.858 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 06 13:14:43.858 INFO [stderr]    |                              ^ help: consider using `_u` instead
Dec 06 13:14:43.858 INFO [stderr] 
Dec 06 13:14:43.869 INFO [stderr] warning: function is never used: `some_function`
Dec 06 13:14:43.869 INFO [stderr]   --> src/traits/bin/main.rs:83:1
Dec 06 13:14:43.869 INFO [stderr]    |
Dec 06 13:14:43.869 INFO [stderr] 83 | / fn some_function<T, U>(t: T, u: U) -> i32
Dec 06 13:14:43.869 INFO [stderr] 84 | |     where T: std::fmt::Display + Clone,
Dec 06 13:14:43.870 INFO [stderr] 85 | |           U: Clone + std::fmt::Debug {
Dec 06 13:14:43.870 INFO [stderr] 86 | |     1
Dec 06 13:14:43.870 INFO [stderr] 87 | | }
Dec 06 13:14:43.870 INFO [stderr]    | |_^
Dec 06 13:14:43.870 INFO [stderr]    |
Dec 06 13:14:43.870 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:43.871 INFO [stderr] 
Dec 06 13:14:43.871 INFO [stderr] warning: struct is never constructed: `Pair`
Dec 06 13:14:43.871 INFO [stderr]   --> src/traits/bin/main.rs:92:1
Dec 06 13:14:43.871 INFO [stderr]    |
Dec 06 13:14:43.871 INFO [stderr] 92 | struct Pair<T> {
Dec 06 13:14:43.871 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 06 13:14:43.872 INFO [stderr] 
Dec 06 13:14:43.872 INFO [stderr] warning: method is never used: `new`
Dec 06 13:14:43.872 INFO [stderr]   --> src/traits/bin/main.rs:98:5
Dec 06 13:14:43.872 INFO [stderr]    |
Dec 06 13:14:43.872 INFO [stderr] 98 |     fn new(x: T, y: T) -> Self {
Dec 06 13:14:43.873 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.873 INFO [stderr] 
Dec 06 13:14:43.873 INFO [stderr] warning: method is never used: `cmp_display`
Dec 06 13:14:43.873 INFO [stderr]    --> src/traits/bin/main.rs:107:5
Dec 06 13:14:43.873 INFO [stderr]     |
Dec 06 13:14:43.873 INFO [stderr] 107 |     fn cmp_display(&self) {
Dec 06 13:14:43.874 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:43.874 INFO [stderr] 
Dec 06 13:14:44.004 INFO [stderr] warning: unused variable: `v`
Dec 06 13:14:44.004 INFO [stderr]  --> src/errors/bin/main.rs:5:9
Dec 06 13:14:44.004 INFO [stderr]   |
Dec 06 13:14:44.004 INFO [stderr] 5 |     let v = vec![1, 2, 3];
Dec 06 13:14:44.004 INFO [stderr]   |         ^ help: consider using `_v` instead
Dec 06 13:14:44.004 INFO [stderr]   |
Dec 06 13:14:44.004 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:44.004 INFO [stderr] 
Dec 06 13:14:44.004 INFO [stderr] warning: unused variable: `f`
Dec 06 13:14:44.004 INFO [stderr]   --> src/errors/bin/main.rs:23:9
Dec 06 13:14:44.004 INFO [stderr]    |
Dec 06 13:14:44.004 INFO [stderr] 23 |     let f = match f {
Dec 06 13:14:44.004 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 06 13:14:44.004 INFO [stderr] 
Dec 06 13:14:44.016 INFO [stderr] warning: function is never used: `read_username_from_file`
Dec 06 13:14:44.016 INFO [stderr]   --> src/errors/bin/main.rs:44:1
Dec 06 13:14:44.016 INFO [stderr]    |
Dec 06 13:14:44.016 INFO [stderr] 44 | fn read_username_from_file() -> Result<String, io::Error> {
Dec 06 13:14:44.016 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:44.016 INFO [stderr]    |
Dec 06 13:14:44.016 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:44.016 INFO [stderr] 
Dec 06 13:14:44.016 INFO [stderr] warning: function is never used: `read_username_from_file2`
Dec 06 13:14:44.016 INFO [stderr]   --> src/errors/bin/main.rs:60:1
Dec 06 13:14:44.016 INFO [stderr]    |
Dec 06 13:14:44.016 INFO [stderr] 60 | fn read_username_from_file2() -> Result<String, io::Error> {
Dec 06 13:14:44.016 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:44.016 INFO [stderr] 
Dec 06 13:14:44.036 INFO [stderr] warning: function `openFile` should have a snake case name such as `open_file`
Dec 06 13:14:44.036 INFO [stderr]   --> src/errors/bin/main.rs:20:1
Dec 06 13:14:44.036 INFO [stderr]    |
Dec 06 13:14:44.036 INFO [stderr] 20 | / fn openFile() {
Dec 06 13:14:44.036 INFO [stderr] 21 | |     let f = File::open("hello.txt");
Dec 06 13:14:44.036 INFO [stderr] 22 | |
Dec 06 13:14:44.036 INFO [stderr] 23 | |     let f = match f {
Dec 06 13:14:44.036 INFO [stderr] ...  |
Dec 06 13:14:44.036 INFO [stderr] 40 | |     };
Dec 06 13:14:44.036 INFO [stderr] 41 | | }
Dec 06 13:14:44.036 INFO [stderr]    | |_^
Dec 06 13:14:44.045 INFO [stderr]    |
Dec 06 13:14:44.045 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 06 13:14:44.045 INFO [stderr] 
Dec 06 13:14:45.528 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 06 13:14:45.528 INFO [stderr]    --> src/collections/bin/main.rs:181:14
Dec 06 13:14:45.528 INFO [stderr]     |
Dec 06 13:14:45.528 INFO [stderr] 181 |         t += (*i as f32);
Dec 06 13:14:45.528 INFO [stderr]     |              ^^^^^^^^^^^ help: remove these parentheses
Dec 06 13:14:45.528 INFO [stderr]     |
Dec 06 13:14:45.528 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 06 13:14:45.528 INFO [stderr] 
Dec 06 13:14:45.652 INFO [stderr] warning: function is never used: `max_ch`
Dec 06 13:14:45.652 INFO [stderr]   --> src/generics/bin/main.rs:51:1
Dec 06 13:14:45.652 INFO [stderr]    |
Dec 06 13:14:45.652 INFO [stderr] 51 | fn max_ch(list: &[char]) -> Option<char> {
Dec 06 13:14:45.652 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:45.652 INFO [stderr]    |
Dec 06 13:14:45.652 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:45.652 INFO [stderr] 
Dec 06 13:14:45.668 INFO [stderr] warning: unused variable: `s1`
Dec 06 13:14:45.668 INFO [stderr]   --> src/collections/bin/main.rs:99:9
Dec 06 13:14:45.668 INFO [stderr]    |
Dec 06 13:14:45.668 INFO [stderr] 99 |     let s1 = String::from("hello");
Dec 06 13:14:45.668 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Dec 06 13:14:45.668 INFO [stderr]    |
Dec 06 13:14:45.668 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 13:14:45.668 INFO [stderr] 
Dec 06 13:14:45.668 INFO [stderr] warning: unused variable: `scores`
Dec 06 13:14:45.668 INFO [stderr]    --> src/collections/bin/main.rs:143:9
Dec 06 13:14:45.668 INFO [stderr]     |
Dec 06 13:14:45.668 INFO [stderr] 143 |     let scores: HashMap<_, _> = zipped.collect();
Dec 06 13:14:45.668 INFO [stderr]     |         ^^^^^^ help: consider using `_scores` instead
Dec 06 13:14:45.668 INFO [stderr] 
Dec 06 13:14:45.723 INFO [stderr] warning: variable does not need to be mutable
Dec 06 13:14:45.723 INFO [stderr]   --> src/collections/bin/main.rs:56:9
Dec 06 13:14:45.723 INFO [stderr]    |
Dec 06 13:14:45.723 INFO [stderr] 56 |     let mut s = String::new();
Dec 06 13:14:45.723 INFO [stderr]    |         ----^
Dec 06 13:14:45.723 INFO [stderr]    |         |
Dec 06 13:14:45.723 INFO [stderr]    |         help: remove this `mut`
Dec 06 13:14:45.723 INFO [stderr]    |
Dec 06 13:14:45.723 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 13:14:45.723 INFO [stderr] 
Dec 06 13:14:46.810 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.19s
Dec 06 13:14:46.819 INFO [stderr] su: No module specific data is present
Dec 06 13:14:47.190 INFO running `"docker" "inspect" "307904281ee4f1767969d8aa16eb25af6ebab0e82937fb59ee374048348c930e"`
Dec 06 13:14:47.285 INFO running `"docker" "rm" "-f" "307904281ee4f1767969d8aa16eb25af6ebab0e82937fb59ee374048348c930e"`
Dec 06 13:14:47.400 INFO [stdout] 307904281ee4f1767969d8aa16eb25af6ebab0e82937fb59ee374048348c930e
Dec 06 13:14:47.404 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 13:14:47.652 INFO [stdout] 26eaa0373f369d1be7de3f9037eb629a4934a1821544fe57ef28478de490b151
Dec 06 13:14:47.658 INFO running `"docker" "start" "-a" "26eaa0373f369d1be7de3f9037eb629a4934a1821544fe57ef28478de490b151"`
Dec 06 13:14:48.100 INFO [stderr] usermod: no changes
Dec 06 13:14:48.172 INFO [stderr]    Compiling rusty-train v0.1.0 (/source)
Dec 06 13:14:49.254 INFO [stderr] warning: function is never used: `middle_function`
Dec 06 13:14:49.254 INFO [stderr]  --> src/communicator/lib/mod.rs:6:5
Dec 06 13:14:49.254 INFO [stderr]   |
Dec 06 13:14:49.254 INFO [stderr] 6 |     pub fn middle_function() {
Dec 06 13:14:49.254 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.254 INFO [stderr]   |
Dec 06 13:14:49.254 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 13:14:49.254 INFO [stderr] 
Dec 06 13:14:49.254 INFO [stderr] warning: function is never used: `middle_secret_function`
Dec 06 13:14:49.254 INFO [stderr]   --> src/communicator/lib/mod.rs:10:5
Dec 06 13:14:49.254 INFO [stderr]    |
Dec 06 13:14:49.254 INFO [stderr] 10 |     fn middle_secret_function() {
Dec 06 13:14:49.260 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.260 INFO [stderr] 
Dec 06 13:14:49.260 INFO [stderr] warning: function is never used: `inner_function`
Dec 06 13:14:49.260 INFO [stderr]   --> src/communicator/lib/mod.rs:17:9
Dec 06 13:14:49.260 INFO [stderr]    |
Dec 06 13:14:49.260 INFO [stderr] 17 |         pub fn inner_function() {}
Dec 06 13:14:49.260 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.260 INFO [stderr] 
Dec 06 13:14:49.260 INFO [stderr] warning: function is never used: `secret_function`
Dec 06 13:14:49.260 INFO [stderr]   --> src/communicator/lib/mod.rs:19:9
Dec 06 13:14:49.260 INFO [stderr]    |
Dec 06 13:14:49.260 INFO [stderr] 19 |         fn secret_function() {
Dec 06 13:14:49.260 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.261 INFO [stderr] 
Dec 06 13:14:49.261 INFO [stderr] warning: function is never used: `inner_function`
Dec 06 13:14:49.261 INFO [stderr]   --> src/communicator/lib/mod.rs:26:13
Dec 06 13:14:49.261 INFO [stderr]    |
Dec 06 13:14:49.261 INFO [stderr] 26 |             pub fn inner_function() {
Dec 06 13:14:49.261 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.261 INFO [stderr] 
Dec 06 13:14:49.261 INFO [stderr] warning: function is never used: `try_me`
Dec 06 13:14:49.261 INFO [stderr]   --> src/communicator/lib/mod.rs:56:1
Dec 06 13:14:49.261 INFO [stderr]    |
Dec 06 13:14:49.261 INFO [stderr] 56 | fn try_me() {
Dec 06 13:14:49.261 INFO [stderr]    | ^^^^^^^^^^^
Dec 06 13:14:49.261 INFO [stderr] 
Dec 06 13:14:49.320 INFO [stderr] warning: unused variable: `black`
Dec 06 13:14:49.320 INFO [stderr]    --> src/chapter3/bin/main.rs:107:9
Dec 06 13:14:49.320 INFO [stderr]     |
Dec 06 13:14:49.320 INFO [stderr] 107 |     let black = Color(0, 0, 0);
Dec 06 13:14:49.320 INFO [stderr]     |         ^^^^^ help: consider using `_black` instead
Dec 06 13:14:49.320 INFO [stderr]     |
Dec 06 13:14:49.320 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 06 13:14:49.320 INFO [stderr] 
Dec 06 13:14:49.328 INFO [stderr] warning: unused variable: `origin`
Dec 06 13:14:49.328 INFO [stderr]    --> src/chapter3/bin/main.rs:108:9
Dec 06 13:14:49.328 INFO [stderr]     |
Dec 06 13:14:49.328 INFO [stderr] 108 |     let origin = Point(0, 0, 0);
Dec 06 13:14:49.328 INFO [stderr]     |         ^^^^^^ help: consider using `_origin` instead
Dec 06 13:14:49.328 INFO [stderr] 
Dec 06 13:14:49.387 INFO [stderr] warning: function is never used: `gives_ownership`
Dec 06 13:14:49.387 INFO [stderr]    --> src/chapter3/bin/main.rs:119:1
Dec 06 13:14:49.387 INFO [stderr]     |
Dec 06 13:14:49.387 INFO [stderr] 119 | fn gives_ownership() -> String {
Dec 06 13:14:49.387 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.387 INFO [stderr]     |
Dec 06 13:14:49.387 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 06 13:14:49.387 INFO [stderr] 
Dec 06 13:14:49.387 INFO [stderr] warning: function is never used: `takes_and_gives_back`
Dec 06 13:14:49.387 INFO [stderr]    --> src/chapter3/bin/main.rs:124:1
Dec 06 13:14:49.387 INFO [stderr]     |
Dec 06 13:14:49.387 INFO [stderr] 124 | fn takes_and_gives_back(a_string: String) -> String {
Dec 06 13:14:49.387 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.388 INFO [stderr] 
Dec 06 13:14:49.388 INFO [stderr] warning: function is never used: `no_dangle`
Dec 06 13:14:49.388 INFO [stderr]    --> src/chapter3/bin/main.rs:149:1
Dec 06 13:14:49.388 INFO [stderr]     |
Dec 06 13:14:49.392 INFO [stderr] 149 | fn no_dangle() -> String {
Dec 06 13:14:49.392 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.392 INFO [stderr] 
Dec 06 13:14:49.392 INFO [stderr] warning: function is never used: `build_user`
Dec 06 13:14:49.392 INFO [stderr]    --> src/chapter3/bin/main.rs:187:1
Dec 06 13:14:49.392 INFO [stderr]     |
Dec 06 13:14:49.392 INFO [stderr] 187 | fn build_user(email: String, username: String) -> User {
Dec 06 13:14:49.392 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.392 INFO [stderr] 
Dec 06 13:14:49.600 INFO [stderr] warning: unused imports: `Red`, `Yellow`
Dec 06 13:14:49.600 INFO [stderr]  --> src/chapter7/bin/main.rs:3:34
Dec 06 13:14:49.600 INFO [stderr]   |
Dec 06 13:14:49.600 INFO [stderr] 3 | use communicator::TrafficLight::{Red, Yellow};
Dec 06 13:14:49.600 INFO [stderr]   |                                  ^^^  ^^^^^^
Dec 06 13:14:49.600 INFO [stderr]   |
Dec 06 13:14:49.600 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 06 13:14:49.601 INFO [stderr] 
Dec 06 13:14:49.623 INFO [stderr] warning: unused variable: `t`
Dec 06 13:14:49.623 INFO [stderr]   --> src/traits/bin/main.rs:83:24
Dec 06 13:14:49.623 INFO [stderr]    |
Dec 06 13:14:49.623 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 06 13:14:49.623 INFO [stderr]    |                        ^ help: consider using `_t` instead
Dec 06 13:14:49.623 INFO [stderr]    |
Dec 06 13:14:49.623 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 13:14:49.623 INFO [stderr] 
Dec 06 13:14:49.623 INFO [stderr] warning: unused variable: `u`
Dec 06 13:14:49.623 INFO [stderr]   --> src/traits/bin/main.rs:83:30
Dec 06 13:14:49.623 INFO [stderr]    |
Dec 06 13:14:49.623 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 06 13:14:49.623 INFO [stderr]    |                              ^ help: consider using `_u` instead
Dec 06 13:14:49.623 INFO [stderr] 
Dec 06 13:14:49.646 INFO [stderr] warning: function is never used: `some_function`
Dec 06 13:14:49.646 INFO [stderr]   --> src/traits/bin/main.rs:83:1
Dec 06 13:14:49.646 INFO [stderr]    |
Dec 06 13:14:49.646 INFO [stderr] 83 | / fn some_function<T, U>(t: T, u: U) -> i32
Dec 06 13:14:49.646 INFO [stderr] 84 | |     where T: std::fmt::Display + Clone,
Dec 06 13:14:49.646 INFO [stderr] 85 | |           U: Clone + std::fmt::Debug {
Dec 06 13:14:49.646 INFO [stderr] 86 | |     1
Dec 06 13:14:49.646 INFO [stderr] 87 | | }
Dec 06 13:14:49.646 INFO [stderr]    | |_^
Dec 06 13:14:49.658 INFO [stderr]    |
Dec 06 13:14:49.658 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:49.659 INFO [stderr] 
Dec 06 13:14:49.659 INFO [stderr] warning: struct is never constructed: `Pair`
Dec 06 13:14:49.659 INFO [stderr]   --> src/traits/bin/main.rs:92:1
Dec 06 13:14:49.659 INFO [stderr]    |
Dec 06 13:14:49.659 INFO [stderr] 92 | struct Pair<T> {
Dec 06 13:14:49.659 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 06 13:14:49.659 INFO [stderr] 
Dec 06 13:14:49.659 INFO [stderr] warning: method is never used: `new`
Dec 06 13:14:49.659 INFO [stderr]   --> src/traits/bin/main.rs:98:5
Dec 06 13:14:49.659 INFO [stderr]    |
Dec 06 13:14:49.659 INFO [stderr] 98 |     fn new(x: T, y: T) -> Self {
Dec 06 13:14:49.659 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.659 INFO [stderr] 
Dec 06 13:14:49.659 INFO [stderr] warning: method is never used: `cmp_display`
Dec 06 13:14:49.659 INFO [stderr]    --> src/traits/bin/main.rs:107:5
Dec 06 13:14:49.659 INFO [stderr]     |
Dec 06 13:14:49.659 INFO [stderr] 107 |     fn cmp_display(&self) {
Dec 06 13:14:49.659 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.659 INFO [stderr] 
Dec 06 13:14:49.680 INFO [stderr] warning: unused variable: `red`
Dec 06 13:14:49.680 INFO [stderr]  --> src/chapter7/bin/main.rs:8:9
Dec 06 13:14:49.680 INFO [stderr]   |
Dec 06 13:14:49.680 INFO [stderr] 8 |     let red = Red;
Dec 06 13:14:49.680 INFO [stderr]   |         ^^^ help: consider using `_red` instead
Dec 06 13:14:49.680 INFO [stderr]   |
Dec 06 13:14:49.680 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:49.680 INFO [stderr] 
Dec 06 13:14:49.680 INFO [stderr] warning: unused variable: `yellow`
Dec 06 13:14:49.680 INFO [stderr]  --> src/chapter7/bin/main.rs:9:9
Dec 06 13:14:49.680 INFO [stderr]   |
Dec 06 13:14:49.680 INFO [stderr] 9 |     let yellow = Yellow;
Dec 06 13:14:49.680 INFO [stderr]   |         ^^^^^^ help: consider using `_yellow` instead
Dec 06 13:14:49.680 INFO [stderr] 
Dec 06 13:14:49.680 INFO [stderr] warning: unused variable: `green`
Dec 06 13:14:49.680 INFO [stderr]   --> src/chapter7/bin/main.rs:10:9
Dec 06 13:14:49.680 INFO [stderr]    |
Dec 06 13:14:49.680 INFO [stderr] 10 |     let green = communicator::TrafficLight::Green;
Dec 06 13:14:49.680 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 06 13:14:49.680 INFO [stderr] 
Dec 06 13:14:49.680 INFO [stderr] warning: unused variable: `green`
Dec 06 13:14:49.680 INFO [stderr]   --> src/chapter7/bin/main.rs:14:9
Dec 06 13:14:49.680 INFO [stderr]    |
Dec 06 13:14:49.680 INFO [stderr] 14 |     let green = Green;
Dec 06 13:14:49.681 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 06 13:14:49.681 INFO [stderr] 
Dec 06 13:14:49.872 INFO [stderr] warning: function is never used: `max_ch`
Dec 06 13:14:49.872 INFO [stderr]   --> src/generics/bin/main.rs:51:1
Dec 06 13:14:49.872 INFO [stderr]    |
Dec 06 13:14:49.872 INFO [stderr] 51 | fn max_ch(list: &[char]) -> Option<char> {
Dec 06 13:14:49.872 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:49.872 INFO [stderr]    |
Dec 06 13:14:49.872 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:49.872 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `ip_type`
Dec 06 13:14:50.081 INFO [stderr]  --> src/chapter6/bin/main.rs:1:10
Dec 06 13:14:50.081 INFO [stderr]   |
Dec 06 13:14:50.081 INFO [stderr] 1 | fn route(ip_type: IpAddrKind) { }
Dec 06 13:14:50.081 INFO [stderr]   |          ^^^^^^^ help: consider using `_ip_type` instead
Dec 06 13:14:50.081 INFO [stderr]   |
Dec 06 13:14:50.081 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `x`
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:32:35
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 32 |     let x = some_string.and_then(|x: &str| Some("sf"));
Dec 06 13:14:50.081 INFO [stderr]    |                                   ^ help: consider using `_x` instead
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `six`
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:11:9
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 11 |     let six = IpAddrKind::V6;
Dec 06 13:14:50.081 INFO [stderr]    |         ^^^ help: consider using `_six` instead
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `home`
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:18:9
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 18 |     let home = IpAddr::V4(String::from("127.0.0.1"));
Dec 06 13:14:50.081 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `loopback`
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:19:9
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 19 |     let loopback = IpAddr::V6(String::from("::1"));
Dec 06 13:14:50.081 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `home`
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:21:9
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 21 |     let home = IpAddr2::V4(127, 0, 0, 1);
Dec 06 13:14:50.081 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: unused variable: `loopback`
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:22:9
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 22 |     let loopback = IpAddr2::V6(String::from("::1"));
Dec 06 13:14:50.081 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 06 13:14:50.081 INFO [stderr] 
Dec 06 13:14:50.081 INFO [stderr] warning: variable `count` is assigned to, but never used
Dec 06 13:14:50.081 INFO [stderr]   --> src/chapter6/bin/main.rs:72:13
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.081 INFO [stderr] 72 |     let mut count = 0;
Dec 06 13:14:50.081 INFO [stderr]    |             ^^^^^
Dec 06 13:14:50.081 INFO [stderr]    |
Dec 06 13:14:50.082 INFO [stderr]    = note: consider using `_count` instead
Dec 06 13:14:50.082 INFO [stderr] 
Dec 06 13:14:50.082 INFO [stderr] warning: value assigned to `count` is never read
Dec 06 13:14:50.082 INFO [stderr]   --> src/chapter6/bin/main.rs:76:9
Dec 06 13:14:50.082 INFO [stderr]    |
Dec 06 13:14:50.082 INFO [stderr] 76 |         count += 1;
Dec 06 13:14:50.082 INFO [stderr]    |         ^^^^^
Dec 06 13:14:50.082 INFO [stderr]    |
Dec 06 13:14:50.082 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 13:14:50.082 INFO [stderr] 
Dec 06 13:14:50.092 INFO [stderr] warning: variant is never constructed: `Quit`
Dec 06 13:14:50.092 INFO [stderr]   --> src/chapter6/bin/main.rs:94:5
Dec 06 13:14:50.092 INFO [stderr]    |
Dec 06 13:14:50.092 INFO [stderr] 94 |     Quit,
Dec 06 13:14:50.092 INFO [stderr]    |     ^^^^
Dec 06 13:14:50.095 INFO [stderr]    |
Dec 06 13:14:50.095 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:50.095 INFO [stderr] 
Dec 06 13:14:50.095 INFO [stderr] warning: variant is never constructed: `Move`
Dec 06 13:14:50.095 INFO [stderr]   --> src/chapter6/bin/main.rs:95:5
Dec 06 13:14:50.095 INFO [stderr]    |
Dec 06 13:14:50.095 INFO [stderr] 95 |     Move { x: i32, y: i32 },
Dec 06 13:14:50.095 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:50.095 INFO [stderr] 
Dec 06 13:14:50.095 INFO [stderr] warning: variant is never constructed: `ChangeColor`
Dec 06 13:14:50.095 INFO [stderr]   --> src/chapter6/bin/main.rs:97:5
Dec 06 13:14:50.095 INFO [stderr]    |
Dec 06 13:14:50.095 INFO [stderr] 97 |     ChangeColor(i32, i32, i32),
Dec 06 13:14:50.095 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:50.095 INFO [stderr] 
Dec 06 13:14:50.096 INFO [stderr] warning: variant is never constructed: `Alaska`
Dec 06 13:14:50.096 INFO [stderr]    --> src/chapter6/bin/main.rs:115:5
Dec 06 13:14:50.096 INFO [stderr]     |
Dec 06 13:14:50.096 INFO [stderr] 115 |     Alaska,
Dec 06 13:14:50.096 INFO [stderr]     |     ^^^^^^
Dec 06 13:14:50.096 INFO [stderr] 
Dec 06 13:14:50.096 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 06 13:14:50.096 INFO [stderr]    --> src/chapter6/bin/main.rs:121:5
Dec 06 13:14:50.096 INFO [stderr]     |
Dec 06 13:14:50.096 INFO [stderr] 121 |     Nickel,
Dec 06 13:14:50.096 INFO [stderr]     |     ^^^^^^
Dec 06 13:14:50.096 INFO [stderr] 
Dec 06 13:14:50.140 INFO [stderr] warning: unused variable: `s`
Dec 06 13:14:50.140 INFO [stderr]  --> src/lifetimes/bin/main.rs:5:13
Dec 06 13:14:50.140 INFO [stderr]   |
Dec 06 13:14:50.140 INFO [stderr] 5 |         let s: &'static str = "asdsa";
Dec 06 13:14:50.140 INFO [stderr]   |             ^ help: consider using `_s` instead
Dec 06 13:14:50.140 INFO [stderr]   |
Dec 06 13:14:50.140 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:50.140 INFO [stderr] 
Dec 06 13:14:50.140 INFO [stderr] warning: unused variable: `y`
Dec 06 13:14:50.140 INFO [stderr]   --> src/lifetimes/bin/main.rs:40:29
Dec 06 13:14:50.140 INFO [stderr]    |
Dec 06 13:14:50.140 INFO [stderr] 40 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str {
Dec 06 13:14:50.140 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 06 13:14:50.140 INFO [stderr] 
Dec 06 13:14:50.140 INFO [stderr] warning: unused variable: `y`
Dec 06 13:14:50.140 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:29
Dec 06 13:14:50.140 INFO [stderr]    |
Dec 06 13:14:50.141 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 06 13:14:50.141 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 06 13:14:50.141 INFO [stderr] 
Dec 06 13:14:50.153 INFO [stderr] warning: function is never used: `longest3`
Dec 06 13:14:50.153 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:1
Dec 06 13:14:50.153 INFO [stderr]    |
Dec 06 13:14:50.153 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 06 13:14:50.153 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:50.153 INFO [stderr]    |
Dec 06 13:14:50.153 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:50.153 INFO [stderr] 
Dec 06 13:14:50.153 INFO [stderr] warning: field is never used: `a`
Dec 06 13:14:50.153 INFO [stderr]   --> src/lifetimes/bin/main.rs:50:5
Dec 06 13:14:50.153 INFO [stderr]    |
Dec 06 13:14:50.153 INFO [stderr] 50 |     a: String,
Dec 06 13:14:50.153 INFO [stderr]    |     ^^^^^^^^^
Dec 06 13:14:50.153 INFO [stderr] 
Dec 06 13:14:50.153 INFO [stderr] warning: method is never used: `level`
Dec 06 13:14:50.153 INFO [stderr]   --> src/lifetimes/bin/main.rs:54:5
Dec 06 13:14:50.153 INFO [stderr]    |
Dec 06 13:14:50.153 INFO [stderr] 54 |     fn level(&self) -> i32 {
Dec 06 13:14:50.153 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:50.153 INFO [stderr] 
Dec 06 13:14:50.153 INFO [stderr] warning: method is never used: `a`
Dec 06 13:14:50.153 INFO [stderr]   --> src/lifetimes/bin/main.rs:60:5
Dec 06 13:14:50.153 INFO [stderr]    |
Dec 06 13:14:50.153 INFO [stderr] 60 |     fn a(&self) -> &str {
Dec 06 13:14:50.153 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:50.153 INFO [stderr] 
Dec 06 13:14:50.153 INFO [stderr] warning: function is never used: `longest_with_an_announcement`
Dec 06 13:14:50.153 INFO [stderr]   --> src/lifetimes/bin/main.rs:67:1
Dec 06 13:14:50.153 INFO [stderr]    |
Dec 06 13:14:50.153 INFO [stderr] 67 | / fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
Dec 06 13:14:50.153 INFO [stderr] 68 | |     where T: Display
Dec 06 13:14:50.153 INFO [stderr] 69 | | {
Dec 06 13:14:50.153 INFO [stderr] 70 | |     println!("Announcement! {}", ann);
Dec 06 13:14:50.153 INFO [stderr] ...  |
Dec 06 13:14:50.153 INFO [stderr] 75 | |     }
Dec 06 13:14:50.153 INFO [stderr] 76 | | }
Dec 06 13:14:50.153 INFO [stderr]    | |_^
Dec 06 13:14:50.153 INFO [stderr] 
Dec 06 13:14:51.356 INFO [stderr] warning: unused variable: `v`
Dec 06 13:14:51.356 INFO [stderr]  --> src/errors/bin/main.rs:5:9
Dec 06 13:14:51.356 INFO [stderr]   |
Dec 06 13:14:51.356 INFO [stderr] 5 |     let v = vec![1, 2, 3];
Dec 06 13:14:51.356 INFO [stderr]   |         ^ help: consider using `_v` instead
Dec 06 13:14:51.356 INFO [stderr]   |
Dec 06 13:14:51.356 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 06 13:14:51.356 INFO [stderr] 
Dec 06 13:14:51.356 INFO [stderr] warning: unused variable: `f`
Dec 06 13:14:51.356 INFO [stderr]   --> src/errors/bin/main.rs:23:9
Dec 06 13:14:51.356 INFO [stderr]    |
Dec 06 13:14:51.356 INFO [stderr] 23 |     let f = match f {
Dec 06 13:14:51.356 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 06 13:14:51.356 INFO [stderr] 
Dec 06 13:14:51.364 INFO [stderr] warning: function is never used: `read_username_from_file`
Dec 06 13:14:51.364 INFO [stderr]   --> src/errors/bin/main.rs:44:1
Dec 06 13:14:51.364 INFO [stderr]    |
Dec 06 13:14:51.364 INFO [stderr] 44 | fn read_username_from_file() -> Result<String, io::Error> {
Dec 06 13:14:51.364 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:51.364 INFO [stderr]    |
Dec 06 13:14:51.364 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 13:14:51.364 INFO [stderr] 
Dec 06 13:14:51.364 INFO [stderr] warning: function is never used: `read_username_from_file2`
Dec 06 13:14:51.364 INFO [stderr]   --> src/errors/bin/main.rs:60:1
Dec 06 13:14:51.364 INFO [stderr]    |
Dec 06 13:14:51.364 INFO [stderr] 60 | fn read_username_from_file2() -> Result<String, io::Error> {
Dec 06 13:14:51.364 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:51.364 INFO [stderr] 
Dec 06 13:14:51.372 INFO [stderr] warning: unused variable: `black`
Dec 06 13:14:51.372 INFO [stderr]   --> src/chapter5/bin/main.rs:23:9
Dec 06 13:14:51.372 INFO [stderr]    |
Dec 06 13:14:51.372 INFO [stderr] 23 |     let black = Color(0, 0, 0);
Dec 06 13:14:51.372 INFO [stderr]    |         ^^^^^ help: consider using `_black` instead
Dec 06 13:14:51.372 INFO [stderr]    |
Dec 06 13:14:51.372 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 13:14:51.372 INFO [stderr] 
Dec 06 13:14:51.372 INFO [stderr] warning: unused variable: `origin`
Dec 06 13:14:51.372 INFO [stderr]   --> src/chapter5/bin/main.rs:24:9
Dec 06 13:14:51.372 INFO [stderr]    |
Dec 06 13:14:51.372 INFO [stderr] 24 |     let origin = Point(0, 0, 0);
Dec 06 13:14:51.372 INFO [stderr]    |         ^^^^^^ help: consider using `_origin` instead
Dec 06 13:14:51.372 INFO [stderr] 
Dec 06 13:14:51.380 INFO [stderr] warning: function `openFile` should have a snake case name such as `open_file`
Dec 06 13:14:51.380 INFO [stderr]   --> src/errors/bin/main.rs:20:1
Dec 06 13:14:51.380 INFO [stderr]    |
Dec 06 13:14:51.380 INFO [stderr] 20 | / fn openFile() {
Dec 06 13:14:51.380 INFO [stderr] 21 | |     let f = File::open("hello.txt");
Dec 06 13:14:51.380 INFO [stderr] 22 | |
Dec 06 13:14:51.380 INFO [stderr] 23 | |     let f = match f {
Dec 06 13:14:51.380 INFO [stderr] ...  |
Dec 06 13:14:51.380 INFO [stderr] 40 | |     };
Dec 06 13:14:51.380 INFO [stderr] 41 | | }
Dec 06 13:14:51.380 INFO [stderr]    | |_^
Dec 06 13:14:51.380 INFO [stderr]    |
Dec 06 13:14:51.380 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 06 13:14:51.380 INFO [stderr] 
Dec 06 13:14:51.384 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 06 13:14:51.384 INFO [stderr]    --> src/collections/bin/main.rs:181:14
Dec 06 13:14:51.384 INFO [stderr]     |
Dec 06 13:14:51.384 INFO [stderr] 181 |         t += (*i as f32);
Dec 06 13:14:51.384 INFO [stderr]     |              ^^^^^^^^^^^ help: remove these parentheses
Dec 06 13:14:51.384 INFO [stderr]     |
Dec 06 13:14:51.384 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 06 13:14:51.384 INFO [stderr] 
Dec 06 13:14:51.411 INFO [stderr] warning: function is never used: `build_user`
Dec 06 13:14:51.411 INFO [stderr]    --> src/chapter5/bin/main.rs:103:1
Dec 06 13:14:51.411 INFO [stderr]     |
Dec 06 13:14:51.411 INFO [stderr] 103 | fn build_user(email: String, username: String) -> User {
Dec 06 13:14:51.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 13:14:51.416 INFO [stderr]     |
Dec 06 13:14:51.416 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 06 13:14:51.416 INFO [stderr] 
Dec 06 13:14:51.601 INFO [stderr] warning: unused variable: `s1`
Dec 06 13:14:51.601 INFO [stderr]   --> src/collections/bin/main.rs:99:9
Dec 06 13:14:51.602 INFO [stderr]    |
Dec 06 13:14:51.602 INFO [stderr] 99 |     let s1 = String::from("hello");
Dec 06 13:14:51.602 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Dec 06 13:14:51.602 INFO [stderr]    |
Dec 06 13:14:51.602 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 13:14:51.602 INFO [stderr] 
Dec 06 13:14:51.602 INFO [stderr] warning: unused variable: `scores`
Dec 06 13:14:51.602 INFO [stderr]    --> src/collections/bin/main.rs:143:9
Dec 06 13:14:51.602 INFO [stderr]     |
Dec 06 13:14:51.602 INFO [stderr] 143 |     let scores: HashMap<_, _> = zipped.collect();
Dec 06 13:14:51.602 INFO [stderr]     |         ^^^^^^ help: consider using `_scores` instead
Dec 06 13:14:51.602 INFO [stderr] 
Dec 06 13:14:51.634 INFO [stderr] warning: variable does not need to be mutable
Dec 06 13:14:51.634 INFO [stderr]   --> src/collections/bin/main.rs:56:9
Dec 06 13:14:51.634 INFO [stderr]    |
Dec 06 13:14:51.634 INFO [stderr] 56 |     let mut s = String::new();
Dec 06 13:14:51.634 INFO [stderr]    |         ----^
Dec 06 13:14:51.634 INFO [stderr]    |         |
Dec 06 13:14:51.634 INFO [stderr]    |         help: remove this `mut`
Dec 06 13:14:51.634 INFO [stderr]    |
Dec 06 13:14:51.634 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 13:14:51.634 INFO [stderr] 
Dec 06 13:14:51.874 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.75s
Dec 06 13:14:51.881 INFO [stderr] su: No module specific data is present
Dec 06 13:14:52.144 INFO running `"docker" "inspect" "26eaa0373f369d1be7de3f9037eb629a4934a1821544fe57ef28478de490b151"`
Dec 06 13:14:52.213 INFO running `"docker" "rm" "-f" "26eaa0373f369d1be7de3f9037eb629a4934a1821544fe57ef28478de490b151"`
Dec 06 13:14:52.300 INFO [stdout] 26eaa0373f369d1be7de3f9037eb629a4934a1821544fe57ef28478de490b151
Dec 06 13:14:52.304 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 13:14:52.460 INFO [stdout] 2bdc2429181e1f2947e7df503116a72939f0edae5bcacec8c4e71e5cba0acca3
Dec 06 13:14:52.465 INFO running `"docker" "start" "-a" "2bdc2429181e1f2947e7df503116a72939f0edae5bcacec8c4e71e5cba0acca3"`
Dec 06 13:14:52.872 INFO [stderr] usermod: no changes
Dec 06 13:14:52.913 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 06 13:14:52.926 INFO [stderr]      Running /target/debug/deps/communicator-2daf69ab55abca31
Dec 06 13:14:52.928 INFO [stdout] 
Dec 06 13:14:52.928 INFO [stdout] running 9 tests
Dec 06 13:14:52.928 INFO [stdout] test tests::expensive_test ... ignored
Dec 06 13:14:52.928 INFO [stdout] test tests::smaller_cannot_hold_larger ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::this_test_will_pass ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::one_hundred ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::larger_can_hold_smaller ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::it_adds_two ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::exploration ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::add_two_and_two ... ok
Dec 06 13:14:52.928 INFO [stdout] test tests::add_three_and_two ... ok
Dec 06 13:14:52.929 INFO [stdout] 
Dec 06 13:14:52.929 INFO [stdout] test result: ok. 8 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.929 INFO [stdout] 
Dec 06 13:14:52.929 INFO [stderr]      Running /target/debug/deps/chapter3-9707df240f4a5f10
Dec 06 13:14:52.930 INFO [stdout] 
Dec 06 13:14:52.930 INFO [stdout] running 0 tests
Dec 06 13:14:52.930 INFO [stdout] 
Dec 06 13:14:52.930 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.930 INFO [stdout] 
Dec 06 13:14:52.931 INFO [stderr]      Running /target/debug/deps/chapter5-a2b1595815ff3cae
Dec 06 13:14:52.932 INFO [stdout] 
Dec 06 13:14:52.932 INFO [stdout] running 0 tests
Dec 06 13:14:52.932 INFO [stdout] 
Dec 06 13:14:52.932 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.932 INFO [stdout] 
Dec 06 13:14:52.932 INFO [stderr]      Running /target/debug/deps/chapter6-044422e7e52e0485
Dec 06 13:14:52.934 INFO [stdout] 
Dec 06 13:14:52.935 INFO [stdout] running 0 tests
Dec 06 13:14:52.935 INFO [stdout] 
Dec 06 13:14:52.935 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.935 INFO [stdout] 
Dec 06 13:14:52.935 INFO [stderr]      Running /target/debug/deps/chapter7-458a4b0bc4bb9317
Dec 06 13:14:52.936 INFO [stdout] 
Dec 06 13:14:52.936 INFO [stdout] running 0 tests
Dec 06 13:14:52.936 INFO [stdout] 
Dec 06 13:14:52.936 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.936 INFO [stdout] 
Dec 06 13:14:52.937 INFO [stderr]      Running /target/debug/deps/collections-41e62129332fe9b5
Dec 06 13:14:52.940 INFO [stdout] 
Dec 06 13:14:52.940 INFO [stdout] running 0 tests
Dec 06 13:14:52.940 INFO [stdout] 
Dec 06 13:14:52.940 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.940 INFO [stdout] 
Dec 06 13:14:52.940 INFO [stderr]      Running /target/debug/deps/errors-af9a54bca0b2fa2a
Dec 06 13:14:52.945 INFO [stderr]      Running /target/debug/deps/generics-95753728d1cb01d3
Dec 06 13:14:52.945 INFO [stdout] 
Dec 06 13:14:52.945 INFO [stdout] running 0 tests
Dec 06 13:14:52.945 INFO [stdout] 
Dec 06 13:14:52.945 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.945 INFO [stdout] 
Dec 06 13:14:52.946 INFO [stdout] 
Dec 06 13:14:52.946 INFO [stdout] running 0 tests
Dec 06 13:14:52.946 INFO [stdout] 
Dec 06 13:14:52.946 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.946 INFO [stdout] 
Dec 06 13:14:52.946 INFO [stderr]      Running /target/debug/deps/lifetimes-de160e7d624c1441
Dec 06 13:14:52.949 INFO [stdout] 
Dec 06 13:14:52.949 INFO [stdout] running 0 tests
Dec 06 13:14:52.949 INFO [stdout] 
Dec 06 13:14:52.949 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.949 INFO [stdout] 
Dec 06 13:14:52.949 INFO [stderr]      Running /target/debug/deps/minigrep-976f38ed8491855b
Dec 06 13:14:52.950 INFO [stdout] 
Dec 06 13:14:52.950 INFO [stdout] running 0 tests
Dec 06 13:14:52.950 INFO [stdout] 
Dec 06 13:14:52.950 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.950 INFO [stdout] 
Dec 06 13:14:52.951 INFO [stderr]      Running /target/debug/deps/traits-2c59f76a6ea8ad8a
Dec 06 13:14:52.952 INFO [stdout] 
Dec 06 13:14:52.952 INFO [stdout] running 0 tests
Dec 06 13:14:52.952 INFO [stdout] 
Dec 06 13:14:52.952 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.952 INFO [stdout] 
Dec 06 13:14:52.952 INFO [stderr]      Running /target/debug/deps/integration_test-207b11edfe4710e3
Dec 06 13:14:52.953 INFO [stdout] 
Dec 06 13:14:52.953 INFO [stdout] running 1 test
Dec 06 13:14:52.953 INFO [stdout] test it_adds_two_ingrt ... ok
Dec 06 13:14:52.953 INFO [stdout] 
Dec 06 13:14:52.953 INFO [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:52.953 INFO [stdout] 
Dec 06 13:14:52.953 INFO [stderr]    Doc-tests communicator
Dec 06 13:14:53.562 INFO [stdout] 
Dec 06 13:14:53.562 INFO [stdout] running 0 tests
Dec 06 13:14:53.562 INFO [stdout] 
Dec 06 13:14:53.562 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 13:14:53.562 INFO [stdout] 
Dec 06 13:14:53.568 INFO [stderr] su: No module specific data is present
Dec 06 13:14:54.398 INFO running `"docker" "inspect" "2bdc2429181e1f2947e7df503116a72939f0edae5bcacec8c4e71e5cba0acca3"`
Dec 06 13:14:54.598 INFO running `"docker" "rm" "-f" "2bdc2429181e1f2947e7df503116a72939f0edae5bcacec8c4e71e5cba0acca3"`
Dec 06 13:14:54.852 INFO [stdout] 2bdc2429181e1f2947e7df503116a72939f0edae5bcacec8c4e71e5cba0acca3