Dec 14 09:31:51.344 INFO testing ICimpoes/rusty-train against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 09:31:51.344 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 14 09:31:51.611 INFO [stdout] d0f7ba7951d9cb188483ccd173afad08e6fddbcad1f4e1f6b60502890c62fff5
Dec 14 09:31:51.613 INFO running `"docker" "start" "-a" "d0f7ba7951d9cb188483ccd173afad08e6fddbcad1f4e1f6b60502890c62fff5"`
Dec 14 09:31:52.262 INFO [stderr] usermod: no changes
Dec 14 09:31:52.332 INFO [stderr]    Compiling rusty-train v0.1.0 (/source)
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `middle_function`
Dec 14 09:31:52.811 INFO [stderr]  --> src/communicator/lib/mod.rs:6:5
Dec 14 09:31:52.811 INFO [stderr]   |
Dec 14 09:31:52.811 INFO [stderr] 6 |     pub fn middle_function() {
Dec 14 09:31:52.811 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr]   |
Dec 14 09:31:52.811 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `middle_secret_function`
Dec 14 09:31:52.811 INFO [stderr]   --> src/communicator/lib/mod.rs:10:5
Dec 14 09:31:52.811 INFO [stderr]    |
Dec 14 09:31:52.811 INFO [stderr] 10 |     fn middle_secret_function() {
Dec 14 09:31:52.811 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `inner_function`
Dec 14 09:31:52.811 INFO [stderr]   --> src/communicator/lib/mod.rs:17:9
Dec 14 09:31:52.811 INFO [stderr]    |
Dec 14 09:31:52.811 INFO [stderr] 17 |         pub fn inner_function() {}
Dec 14 09:31:52.811 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `secret_function`
Dec 14 09:31:52.811 INFO [stderr]   --> src/communicator/lib/mod.rs:19:9
Dec 14 09:31:52.811 INFO [stderr]    |
Dec 14 09:31:52.811 INFO [stderr] 19 |         fn secret_function() {
Dec 14 09:31:52.811 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `inner_function`
Dec 14 09:31:52.811 INFO [stderr]   --> src/communicator/lib/mod.rs:26:13
Dec 14 09:31:52.811 INFO [stderr]    |
Dec 14 09:31:52.811 INFO [stderr] 26 |             pub fn inner_function() {
Dec 14 09:31:52.811 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `try_me`
Dec 14 09:31:52.811 INFO [stderr]   --> src/communicator/lib/mod.rs:56:1
Dec 14 09:31:52.811 INFO [stderr]    |
Dec 14 09:31:52.811 INFO [stderr] 56 | fn try_me() {
Dec 14 09:31:52.811 INFO [stderr]    | ^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:52.811 INFO [stderr] warning: function is never used: `prints_and_returns_10`
Dec 14 09:31:52.811 INFO [stderr]   --> src/communicator/lib/mod.rs:89:1
Dec 14 09:31:52.811 INFO [stderr]    |
Dec 14 09:31:52.811 INFO [stderr] 89 | fn prints_and_returns_10(a: i32) -> i32 {
Dec 14 09:31:52.811 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:52.811 INFO [stderr] 
Dec 14 09:31:53.559 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 14 09:31:53.559 INFO [stderr]    --> src/collections/bin/main.rs:181:14
Dec 14 09:31:53.559 INFO [stderr]     |
Dec 14 09:31:53.559 INFO [stderr] 181 |         t += (*i as f32);
Dec 14 09:31:53.559 INFO [stderr]     |              ^^^^^^^^^^^ help: remove these parentheses
Dec 14 09:31:53.559 INFO [stderr]     |
Dec 14 09:31:53.559 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 14 09:31:53.559 INFO [stderr] 
Dec 14 09:31:54.319 INFO [stderr] warning: unused variable: `s1`
Dec 14 09:31:54.319 INFO [stderr]   --> src/collections/bin/main.rs:99:9
Dec 14 09:31:54.319 INFO [stderr]    |
Dec 14 09:31:54.319 INFO [stderr] 99 |     let s1 = String::from("hello");
Dec 14 09:31:54.319 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Dec 14 09:31:54.319 INFO [stderr]    |
Dec 14 09:31:54.319 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 09:31:54.319 INFO [stderr] 
Dec 14 09:31:54.319 INFO [stderr] warning: unused variable: `scores`
Dec 14 09:31:54.319 INFO [stderr]    --> src/collections/bin/main.rs:143:9
Dec 14 09:31:54.319 INFO [stderr]     |
Dec 14 09:31:54.319 INFO [stderr] 143 |     let scores: HashMap<_, _> = zipped.collect();
Dec 14 09:31:54.319 INFO [stderr]     |         ^^^^^^ help: consider using `_scores` instead
Dec 14 09:31:54.319 INFO [stderr] 
Dec 14 09:31:54.371 INFO [stderr] warning: unused variable: `v`
Dec 14 09:31:54.371 INFO [stderr]  --> src/errors/bin/main.rs:5:9
Dec 14 09:31:54.371 INFO [stderr]   |
Dec 14 09:31:54.371 INFO [stderr] 5 |     let v = vec![1, 2, 3];
Dec 14 09:31:54.371 INFO [stderr]   |         ^ help: consider using `_v` instead
Dec 14 09:31:54.371 INFO [stderr]   |
Dec 14 09:31:54.371 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:31:54.371 INFO [stderr] 
Dec 14 09:31:54.371 INFO [stderr] warning: unused variable: `f`
Dec 14 09:31:54.371 INFO [stderr]   --> src/errors/bin/main.rs:23:9
Dec 14 09:31:54.371 INFO [stderr]    |
Dec 14 09:31:54.371 INFO [stderr] 23 |     let f = match f {
Dec 14 09:31:54.371 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 14 09:31:54.371 INFO [stderr] 
Dec 14 09:31:54.419 INFO [stderr] warning: function is never used: `read_username_from_file`
Dec 14 09:31:54.419 INFO [stderr]   --> src/errors/bin/main.rs:44:1
Dec 14 09:31:54.419 INFO [stderr]    |
Dec 14 09:31:54.419 INFO [stderr] 44 | fn read_username_from_file() -> Result<String, io::Error> {
Dec 14 09:31:54.419 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.463 INFO [stderr] warning: variable does not need to be mutable
Dec 14 09:31:54.463 INFO [stderr]   --> src/collections/bin/main.rs:56:9
Dec 14 09:31:54.463 INFO [stderr]    |
Dec 14 09:31:54.463 INFO [stderr] 56 |     let mut s = String::new();
Dec 14 09:31:54.463 INFO [stderr]    |         ----^
Dec 14 09:31:54.463 INFO [stderr]    |         |
Dec 14 09:31:54.463 INFO [stderr]    |         help: remove this `mut`
Dec 14 09:31:54.463 INFO [stderr]    |
Dec 14 09:31:54.463 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 09:31:54.463 INFO [stderr] 
Dec 14 09:31:54.463 INFO [stderr]    |
Dec 14 09:31:54.463 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:31:54.463 INFO [stderr] 
Dec 14 09:31:54.463 INFO [stderr] warning: function is never used: `read_username_from_file2`
Dec 14 09:31:54.463 INFO [stderr]   --> src/errors/bin/main.rs:60:1
Dec 14 09:31:54.463 INFO [stderr]    |
Dec 14 09:31:54.463 INFO [stderr] 60 | fn read_username_from_file2() -> Result<String, io::Error> {
Dec 14 09:31:54.463 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.463 INFO [stderr] 
Dec 14 09:31:54.483 INFO [stderr] warning: function `openFile` should have a snake case name such as `open_file`
Dec 14 09:31:54.483 INFO [stderr]   --> src/errors/bin/main.rs:20:1
Dec 14 09:31:54.483 INFO [stderr]    |
Dec 14 09:31:54.483 INFO [stderr] 20 | / fn openFile() {
Dec 14 09:31:54.483 INFO [stderr] 21 | |     let f = File::open("hello.txt");
Dec 14 09:31:54.483 INFO [stderr] 22 | |
Dec 14 09:31:54.483 INFO [stderr] 23 | |     let f = match f {
Dec 14 09:31:54.483 INFO [stderr] ...  |
Dec 14 09:31:54.483 INFO [stderr] 40 | |     };
Dec 14 09:31:54.483 INFO [stderr] 41 | | }
Dec 14 09:31:54.483 INFO [stderr]    | |_^
Dec 14 09:31:54.483 INFO [stderr]    |
Dec 14 09:31:54.483 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 14 09:31:54.483 INFO [stderr] 
Dec 14 09:31:54.567 INFO [stderr] warning: unused variable: `black`
Dec 14 09:31:54.567 INFO [stderr]    --> src/chapter3/bin/main.rs:107:9
Dec 14 09:31:54.567 INFO [stderr]     |
Dec 14 09:31:54.567 INFO [stderr] 107 |     let black = Color(0, 0, 0);
Dec 14 09:31:54.567 INFO [stderr]     |         ^^^^^ help: consider using `_black` instead
Dec 14 09:31:54.567 INFO [stderr]     |
Dec 14 09:31:54.567 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 14 09:31:54.567 INFO [stderr] 
Dec 14 09:31:54.567 INFO [stderr] warning: unused variable: `origin`
Dec 14 09:31:54.567 INFO [stderr]    --> src/chapter3/bin/main.rs:108:9
Dec 14 09:31:54.567 INFO [stderr]     |
Dec 14 09:31:54.567 INFO [stderr] 108 |     let origin = Point(0, 0, 0);
Dec 14 09:31:54.567 INFO [stderr]     |         ^^^^^^ help: consider using `_origin` instead
Dec 14 09:31:54.567 INFO [stderr] 
Dec 14 09:31:54.619 INFO [stderr] warning: function is never used: `gives_ownership`
Dec 14 09:31:54.620 INFO [stderr]    --> src/chapter3/bin/main.rs:119:1
Dec 14 09:31:54.620 INFO [stderr]     |
Dec 14 09:31:54.620 INFO [stderr] 119 | fn gives_ownership() -> String {
Dec 14 09:31:54.620 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.620 INFO [stderr]     |
Dec 14 09:31:54.620 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 14 09:31:54.620 INFO [stderr] 
Dec 14 09:31:54.620 INFO [stderr] warning: function is never used: `takes_and_gives_back`
Dec 14 09:31:54.620 INFO [stderr]    --> src/chapter3/bin/main.rs:124:1
Dec 14 09:31:54.620 INFO [stderr]     |
Dec 14 09:31:54.620 INFO [stderr] 124 | fn takes_and_gives_back(a_string: String) -> String {
Dec 14 09:31:54.620 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.620 INFO [stderr] 
Dec 14 09:31:54.620 INFO [stderr] warning: function is never used: `no_dangle`
Dec 14 09:31:54.620 INFO [stderr]    --> src/chapter3/bin/main.rs:149:1
Dec 14 09:31:54.620 INFO [stderr]     |
Dec 14 09:31:54.620 INFO [stderr] 149 | fn no_dangle() -> String {
Dec 14 09:31:54.620 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.620 INFO [stderr] 
Dec 14 09:31:54.620 INFO [stderr] warning: function is never used: `build_user`
Dec 14 09:31:54.620 INFO [stderr]    --> src/chapter3/bin/main.rs:187:1
Dec 14 09:31:54.620 INFO [stderr]     |
Dec 14 09:31:54.620 INFO [stderr] 187 | fn build_user(email: String, username: String) -> User {
Dec 14 09:31:54.620 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.620 INFO [stderr] 
Dec 14 09:31:54.751 INFO [stderr] warning: unused variable: `black`
Dec 14 09:31:54.751 INFO [stderr]   --> src/chapter5/bin/main.rs:23:9
Dec 14 09:31:54.751 INFO [stderr]    |
Dec 14 09:31:54.751 INFO [stderr] 23 |     let black = Color(0, 0, 0);
Dec 14 09:31:54.751 INFO [stderr]    |         ^^^^^ help: consider using `_black` instead
Dec 14 09:31:54.751 INFO [stderr]    |
Dec 14 09:31:54.751 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 09:31:54.751 INFO [stderr] 
Dec 14 09:31:54.751 INFO [stderr] warning: unused variable: `origin`
Dec 14 09:31:54.751 INFO [stderr]   --> src/chapter5/bin/main.rs:24:9
Dec 14 09:31:54.751 INFO [stderr]    |
Dec 14 09:31:54.751 INFO [stderr] 24 |     let origin = Point(0, 0, 0);
Dec 14 09:31:54.751 INFO [stderr]    |         ^^^^^^ help: consider using `_origin` instead
Dec 14 09:31:54.751 INFO [stderr] 
Dec 14 09:31:54.767 INFO [stderr] warning: function is never used: `build_user`
Dec 14 09:31:54.767 INFO [stderr]    --> src/chapter5/bin/main.rs:103:1
Dec 14 09:31:54.767 INFO [stderr]     |
Dec 14 09:31:54.767 INFO [stderr] 103 | fn build_user(email: String, username: String) -> User {
Dec 14 09:31:54.767 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.767 INFO [stderr]     |
Dec 14 09:31:54.767 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 14 09:31:54.767 INFO [stderr] 
Dec 14 09:31:54.870 INFO [stderr] warning: function is never used: `max_ch`
Dec 14 09:31:54.870 INFO [stderr]   --> src/generics/bin/main.rs:51:1
Dec 14 09:31:54.870 INFO [stderr]    |
Dec 14 09:31:54.870 INFO [stderr] 51 | fn max_ch(list: &[char]) -> Option<char> {
Dec 14 09:31:54.870 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:54.870 INFO [stderr]    |
Dec 14 09:31:54.870 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:31:54.870 INFO [stderr] 
Dec 14 09:31:55.203 INFO [stderr] warning: unused variable: `s`
Dec 14 09:31:55.203 INFO [stderr]  --> src/lifetimes/bin/main.rs:5:13
Dec 14 09:31:55.203 INFO [stderr]   |
Dec 14 09:31:55.203 INFO [stderr] 5 |         let s: &'static str = "asdsa";
Dec 14 09:31:55.203 INFO [stderr]   |             ^ help: consider using `_s` instead
Dec 14 09:31:55.203 INFO [stderr]   |
Dec 14 09:31:55.203 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:31:55.203 INFO [stderr] 
Dec 14 09:31:55.203 INFO [stderr] warning: unused variable: `y`
Dec 14 09:31:55.203 INFO [stderr]   --> src/lifetimes/bin/main.rs:40:29
Dec 14 09:31:55.203 INFO [stderr]    |
Dec 14 09:31:55.203 INFO [stderr] 40 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str {
Dec 14 09:31:55.203 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 14 09:31:55.203 INFO [stderr] 
Dec 14 09:31:55.203 INFO [stderr] warning: unused variable: `y`
Dec 14 09:31:55.203 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:29
Dec 14 09:31:55.203 INFO [stderr]    |
Dec 14 09:31:55.203 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 14 09:31:55.203 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 14 09:31:55.203 INFO [stderr] 
Dec 14 09:31:55.223 INFO [stderr] warning: function is never used: `longest3`
Dec 14 09:31:55.223 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:1
Dec 14 09:31:55.223 INFO [stderr]    |
Dec 14 09:31:55.223 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 14 09:31:55.223 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:55.231 INFO [stderr] warning: unused variable: `t`
Dec 14 09:31:55.231 INFO [stderr]   --> src/traits/bin/main.rs:83:24
Dec 14 09:31:55.231 INFO [stderr]    |
Dec 14 09:31:55.231 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 14 09:31:55.231 INFO [stderr]    |                        ^ help: consider using `_t` instead
Dec 14 09:31:55.235 INFO [stderr]    |
Dec 14 09:31:55.235 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 09:31:55.235 INFO [stderr] 
Dec 14 09:31:55.235 INFO [stderr] warning: unused variable: `u`
Dec 14 09:31:55.235 INFO [stderr]   --> src/traits/bin/main.rs:83:30
Dec 14 09:31:55.235 INFO [stderr]    |
Dec 14 09:31:55.235 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 14 09:31:55.235 INFO [stderr]    |                              ^ help: consider using `_u` instead
Dec 14 09:31:55.235 INFO [stderr] 
Dec 14 09:31:55.239 INFO [stderr]    |
Dec 14 09:31:55.239 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:31:55.239 INFO [stderr] 
Dec 14 09:31:55.239 INFO [stderr] warning: field is never used: `a`
Dec 14 09:31:55.239 INFO [stderr]   --> src/lifetimes/bin/main.rs:50:5
Dec 14 09:31:55.239 INFO [stderr]    |
Dec 14 09:31:55.239 INFO [stderr] 50 |     a: String,
Dec 14 09:31:55.239 INFO [stderr]    |     ^^^^^^^^^
Dec 14 09:31:55.239 INFO [stderr] 
Dec 14 09:31:55.239 INFO [stderr] warning: method is never used: `level`
Dec 14 09:31:55.239 INFO [stderr]   --> src/lifetimes/bin/main.rs:54:5
Dec 14 09:31:55.239 INFO [stderr]    |
Dec 14 09:31:55.239 INFO [stderr] 54 |     fn level(&self) -> i32 {
Dec 14 09:31:55.239 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:55.239 INFO [stderr] 
Dec 14 09:31:55.239 INFO [stderr] warning: method is never used: `a`
Dec 14 09:31:55.239 INFO [stderr]   --> src/lifetimes/bin/main.rs:60:5
Dec 14 09:31:55.239 INFO [stderr]    |
Dec 14 09:31:55.239 INFO [stderr] 60 |     fn a(&self) -> &str {
Dec 14 09:31:55.239 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:55.239 INFO [stderr] 
Dec 14 09:31:55.239 INFO [stderr] warning: function is never used: `longest_with_an_announcement`
Dec 14 09:31:55.239 INFO [stderr]   --> src/lifetimes/bin/main.rs:67:1
Dec 14 09:31:55.239 INFO [stderr]    |
Dec 14 09:31:55.239 INFO [stderr] 67 | / fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
Dec 14 09:31:55.239 INFO [stderr] 68 | |     where T: Display
Dec 14 09:31:55.239 INFO [stderr] 69 | | {
Dec 14 09:31:55.239 INFO [stderr] 70 | |     println!("Announcement! {}", ann);
Dec 14 09:31:55.239 INFO [stderr] ...  |
Dec 14 09:31:55.239 INFO [stderr] 75 | |     }
Dec 14 09:31:55.239 INFO [stderr] 76 | | }
Dec 14 09:31:55.239 INFO [stderr]    | |_^
Dec 14 09:31:55.239 INFO [stderr] 
Dec 14 09:31:55.263 INFO [stderr] warning: function is never used: `some_function`
Dec 14 09:31:55.263 INFO [stderr]   --> src/traits/bin/main.rs:83:1
Dec 14 09:31:55.263 INFO [stderr]    |
Dec 14 09:31:55.263 INFO [stderr] 83 | / fn some_function<T, U>(t: T, u: U) -> i32
Dec 14 09:31:55.263 INFO [stderr] 84 | |     where T: std::fmt::Display + Clone,
Dec 14 09:31:55.263 INFO [stderr] 85 | |           U: Clone + std::fmt::Debug {
Dec 14 09:31:55.263 INFO [stderr] 86 | |     1
Dec 14 09:31:55.263 INFO [stderr] 87 | | }
Dec 14 09:31:55.263 INFO [stderr]    | |_^
Dec 14 09:31:55.263 INFO [stderr]    |
Dec 14 09:31:55.263 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:31:55.263 INFO [stderr] 
Dec 14 09:31:55.263 INFO [stderr] warning: struct is never constructed: `Pair`
Dec 14 09:31:55.263 INFO [stderr]   --> src/traits/bin/main.rs:92:1
Dec 14 09:31:55.263 INFO [stderr]    |
Dec 14 09:31:55.263 INFO [stderr] 92 | struct Pair<T> {
Dec 14 09:31:55.263 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 14 09:31:55.263 INFO [stderr] 
Dec 14 09:31:55.263 INFO [stderr] warning: method is never used: `new`
Dec 14 09:31:55.263 INFO [stderr]   --> src/traits/bin/main.rs:98:5
Dec 14 09:31:55.263 INFO [stderr]    |
Dec 14 09:31:55.263 INFO [stderr] 98 |     fn new(x: T, y: T) -> Self {
Dec 14 09:31:55.263 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:55.263 INFO [stderr] 
Dec 14 09:31:55.263 INFO [stderr] warning: method is never used: `cmp_display`
Dec 14 09:31:55.263 INFO [stderr]    --> src/traits/bin/main.rs:107:5
Dec 14 09:31:55.263 INFO [stderr]     |
Dec 14 09:31:55.263 INFO [stderr] 107 |     fn cmp_display(&self) {
Dec 14 09:31:55.263 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:55.263 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `ip_type`
Dec 14 09:31:57.687 INFO [stderr]  --> src/chapter6/bin/main.rs:1:10
Dec 14 09:31:57.687 INFO [stderr]   |
Dec 14 09:31:57.687 INFO [stderr] 1 | fn route(ip_type: IpAddrKind) { }
Dec 14 09:31:57.687 INFO [stderr]   |          ^^^^^^^ help: consider using `_ip_type` instead
Dec 14 09:31:57.687 INFO [stderr]   |
Dec 14 09:31:57.687 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `x`
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:32:35
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 32 |     let x = some_string.and_then(|x: &str| Some("sf"));
Dec 14 09:31:57.687 INFO [stderr]    |                                   ^ help: consider using `_x` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `six`
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:11:9
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 11 |     let six = IpAddrKind::V6;
Dec 14 09:31:57.687 INFO [stderr]    |         ^^^ help: consider using `_six` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `home`
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:18:9
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 18 |     let home = IpAddr::V4(String::from("127.0.0.1"));
Dec 14 09:31:57.687 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `loopback`
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:19:9
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 19 |     let loopback = IpAddr::V6(String::from("::1"));
Dec 14 09:31:57.687 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `home`
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:21:9
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 21 |     let home = IpAddr2::V4(127, 0, 0, 1);
Dec 14 09:31:57.687 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: unused variable: `loopback`
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:22:9
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 22 |     let loopback = IpAddr2::V6(String::from("::1"));
Dec 14 09:31:57.687 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: variable `count` is assigned to, but never used
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:72:13
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 72 |     let mut count = 0;
Dec 14 09:31:57.687 INFO [stderr]    |             ^^^^^
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr]    = note: consider using `_count` instead
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.687 INFO [stderr] warning: value assigned to `count` is never read
Dec 14 09:31:57.687 INFO [stderr]   --> src/chapter6/bin/main.rs:76:9
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr] 76 |         count += 1;
Dec 14 09:31:57.687 INFO [stderr]    |         ^^^^^
Dec 14 09:31:57.687 INFO [stderr]    |
Dec 14 09:31:57.687 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 14 09:31:57.687 INFO [stderr] 
Dec 14 09:31:57.695 INFO [stderr] warning: variant is never constructed: `Quit`
Dec 14 09:31:57.695 INFO [stderr]   --> src/chapter6/bin/main.rs:94:5
Dec 14 09:31:57.695 INFO [stderr]    |
Dec 14 09:31:57.695 INFO [stderr] 94 |     Quit,
Dec 14 09:31:57.695 INFO [stderr]    |     ^^^^
Dec 14 09:31:57.695 INFO [stderr]    |
Dec 14 09:31:57.695 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:31:57.695 INFO [stderr] 
Dec 14 09:31:57.695 INFO [stderr] warning: variant is never constructed: `Move`
Dec 14 09:31:57.695 INFO [stderr]   --> src/chapter6/bin/main.rs:95:5
Dec 14 09:31:57.695 INFO [stderr]    |
Dec 14 09:31:57.695 INFO [stderr] 95 |     Move { x: i32, y: i32 },
Dec 14 09:31:57.695 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:57.695 INFO [stderr] 
Dec 14 09:31:57.695 INFO [stderr] warning: variant is never constructed: `ChangeColor`
Dec 14 09:31:57.695 INFO [stderr]   --> src/chapter6/bin/main.rs:97:5
Dec 14 09:31:57.695 INFO [stderr]    |
Dec 14 09:31:57.695 INFO [stderr] 97 |     ChangeColor(i32, i32, i32),
Dec 14 09:31:57.695 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:31:57.695 INFO [stderr] 
Dec 14 09:31:57.695 INFO [stderr] warning: variant is never constructed: `Alaska`
Dec 14 09:31:57.695 INFO [stderr]    --> src/chapter6/bin/main.rs:115:5
Dec 14 09:31:57.695 INFO [stderr]     |
Dec 14 09:31:57.695 INFO [stderr] 115 |     Alaska,
Dec 14 09:31:57.695 INFO [stderr]     |     ^^^^^^
Dec 14 09:31:57.695 INFO [stderr] 
Dec 14 09:31:57.695 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 14 09:31:57.699 INFO [stderr]    --> src/chapter6/bin/main.rs:121:5
Dec 14 09:31:57.699 INFO [stderr]     |
Dec 14 09:31:57.699 INFO [stderr] 121 |     Nickel,
Dec 14 09:31:57.699 INFO [stderr]     |     ^^^^^^
Dec 14 09:31:57.699 INFO [stderr] 
Dec 14 09:31:57.887 INFO [stderr] warning: unused imports: `Red`, `Yellow`
Dec 14 09:31:57.887 INFO [stderr]  --> src/chapter7/bin/main.rs:3:34
Dec 14 09:31:57.887 INFO [stderr]   |
Dec 14 09:31:57.887 INFO [stderr] 3 | use communicator::TrafficLight::{Red, Yellow};
Dec 14 09:31:57.887 INFO [stderr]   |                                  ^^^  ^^^^^^
Dec 14 09:31:57.887 INFO [stderr]   |
Dec 14 09:31:57.887 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 14 09:31:57.887 INFO [stderr] 
Dec 14 09:31:57.897 INFO [stderr] warning: unused variable: `red`
Dec 14 09:31:57.897 INFO [stderr]  --> src/chapter7/bin/main.rs:8:9
Dec 14 09:31:57.897 INFO [stderr]   |
Dec 14 09:31:57.898 INFO [stderr] 8 |     let red = Red;
Dec 14 09:31:57.898 INFO [stderr]   |         ^^^ help: consider using `_red` instead
Dec 14 09:31:57.898 INFO [stderr]   |
Dec 14 09:31:57.898 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:31:57.898 INFO [stderr] 
Dec 14 09:31:57.898 INFO [stderr] warning: unused variable: `yellow`
Dec 14 09:31:57.898 INFO [stderr]  --> src/chapter7/bin/main.rs:9:9
Dec 14 09:31:57.898 INFO [stderr]   |
Dec 14 09:31:57.898 INFO [stderr] 9 |     let yellow = Yellow;
Dec 14 09:31:57.898 INFO [stderr]   |         ^^^^^^ help: consider using `_yellow` instead
Dec 14 09:31:57.898 INFO [stderr] 
Dec 14 09:31:57.898 INFO [stderr] warning: unused variable: `green`
Dec 14 09:31:57.898 INFO [stderr]   --> src/chapter7/bin/main.rs:10:9
Dec 14 09:31:57.898 INFO [stderr]    |
Dec 14 09:31:57.898 INFO [stderr] 10 |     let green = communicator::TrafficLight::Green;
Dec 14 09:31:57.898 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 14 09:31:57.898 INFO [stderr] 
Dec 14 09:31:57.898 INFO [stderr] warning: unused variable: `green`
Dec 14 09:31:57.898 INFO [stderr]   --> src/chapter7/bin/main.rs:14:9
Dec 14 09:31:57.898 INFO [stderr]    |
Dec 14 09:31:57.898 INFO [stderr] 14 |     let green = Green;
Dec 14 09:31:57.898 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 14 09:31:57.898 INFO [stderr] 
Dec 14 09:31:58.075 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.79s
Dec 14 09:31:58.083 INFO [stderr] su: No module specific data is present
Dec 14 09:31:58.363 INFO running `"docker" "inspect" "d0f7ba7951d9cb188483ccd173afad08e6fddbcad1f4e1f6b60502890c62fff5"`
Dec 14 09:31:58.481 INFO running `"docker" "rm" "-f" "d0f7ba7951d9cb188483ccd173afad08e6fddbcad1f4e1f6b60502890c62fff5"`
Dec 14 09:31:58.669 INFO [stdout] d0f7ba7951d9cb188483ccd173afad08e6fddbcad1f4e1f6b60502890c62fff5
Dec 14 09:31:58.673 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 14 09:31:58.929 INFO [stdout] fe6d8d50289704953a99abad8c02967977d8e563a77641dce99f4fb22f1f383b
Dec 14 09:31:58.932 INFO running `"docker" "start" "-a" "fe6d8d50289704953a99abad8c02967977d8e563a77641dce99f4fb22f1f383b"`
Dec 14 09:31:59.602 INFO [stderr] usermod: no changes
Dec 14 09:31:59.651 INFO [stderr]    Compiling rusty-train v0.1.0 (/source)
Dec 14 09:32:00.304 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 14 09:32:00.304 INFO [stderr]    --> src/collections/bin/main.rs:181:14
Dec 14 09:32:00.304 INFO [stderr]     |
Dec 14 09:32:00.304 INFO [stderr] 181 |         t += (*i as f32);
Dec 14 09:32:00.304 INFO [stderr]     |              ^^^^^^^^^^^ help: remove these parentheses
Dec 14 09:32:00.304 INFO [stderr]     |
Dec 14 09:32:00.304 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 14 09:32:00.304 INFO [stderr] 
Dec 14 09:32:00.486 INFO [stderr] warning: unused variable: `s1`
Dec 14 09:32:00.486 INFO [stderr]   --> src/collections/bin/main.rs:99:9
Dec 14 09:32:00.486 INFO [stderr]    |
Dec 14 09:32:00.486 INFO [stderr] 99 |     let s1 = String::from("hello");
Dec 14 09:32:00.486 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Dec 14 09:32:00.486 INFO [stderr]    |
Dec 14 09:32:00.486 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 09:32:00.486 INFO [stderr] 
Dec 14 09:32:00.486 INFO [stderr] warning: unused variable: `scores`
Dec 14 09:32:00.486 INFO [stderr]    --> src/collections/bin/main.rs:143:9
Dec 14 09:32:00.486 INFO [stderr]     |
Dec 14 09:32:00.486 INFO [stderr] 143 |     let scores: HashMap<_, _> = zipped.collect();
Dec 14 09:32:00.486 INFO [stderr]     |         ^^^^^^ help: consider using `_scores` instead
Dec 14 09:32:00.486 INFO [stderr] 
Dec 14 09:32:00.523 INFO [stderr] warning: variable does not need to be mutable
Dec 14 09:32:00.523 INFO [stderr]   --> src/collections/bin/main.rs:56:9
Dec 14 09:32:00.523 INFO [stderr]    |
Dec 14 09:32:00.523 INFO [stderr] 56 |     let mut s = String::new();
Dec 14 09:32:00.523 INFO [stderr]    |         ----^
Dec 14 09:32:00.523 INFO [stderr]    |         |
Dec 14 09:32:00.523 INFO [stderr]    |         help: remove this `mut`
Dec 14 09:32:00.523 INFO [stderr]    |
Dec 14 09:32:00.523 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 09:32:00.523 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `ip_type`
Dec 14 09:32:00.643 INFO [stderr]  --> src/chapter6/bin/main.rs:1:10
Dec 14 09:32:00.643 INFO [stderr]   |
Dec 14 09:32:00.643 INFO [stderr] 1 | fn route(ip_type: IpAddrKind) { }
Dec 14 09:32:00.643 INFO [stderr]   |          ^^^^^^^ help: consider using `_ip_type` instead
Dec 14 09:32:00.643 INFO [stderr]   |
Dec 14 09:32:00.643 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `x`
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:32:35
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 32 |     let x = some_string.and_then(|x: &str| Some("sf"));
Dec 14 09:32:00.643 INFO [stderr]    |                                   ^ help: consider using `_x` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `six`
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:11:9
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 11 |     let six = IpAddrKind::V6;
Dec 14 09:32:00.643 INFO [stderr]    |         ^^^ help: consider using `_six` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `home`
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:18:9
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 18 |     let home = IpAddr::V4(String::from("127.0.0.1"));
Dec 14 09:32:00.643 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `loopback`
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:19:9
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 19 |     let loopback = IpAddr::V6(String::from("::1"));
Dec 14 09:32:00.643 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `home`
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:21:9
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 21 |     let home = IpAddr2::V4(127, 0, 0, 1);
Dec 14 09:32:00.643 INFO [stderr]    |         ^^^^ help: consider using `_home` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: unused variable: `loopback`
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:22:9
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 22 |     let loopback = IpAddr2::V6(String::from("::1"));
Dec 14 09:32:00.643 INFO [stderr]    |         ^^^^^^^^ help: consider using `_loopback` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: variable `count` is assigned to, but never used
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:72:13
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 72 |     let mut count = 0;
Dec 14 09:32:00.643 INFO [stderr]    |             ^^^^^
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr]    = note: consider using `_count` instead
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.643 INFO [stderr] warning: value assigned to `count` is never read
Dec 14 09:32:00.643 INFO [stderr]   --> src/chapter6/bin/main.rs:76:9
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr] 76 |         count += 1;
Dec 14 09:32:00.643 INFO [stderr]    |         ^^^^^
Dec 14 09:32:00.643 INFO [stderr]    |
Dec 14 09:32:00.643 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 14 09:32:00.643 INFO [stderr] 
Dec 14 09:32:00.655 INFO [stderr] warning: variant is never constructed: `Quit`
Dec 14 09:32:00.655 INFO [stderr]   --> src/chapter6/bin/main.rs:94:5
Dec 14 09:32:00.655 INFO [stderr]    |
Dec 14 09:32:00.655 INFO [stderr] 94 |     Quit,
Dec 14 09:32:00.655 INFO [stderr]    |     ^^^^
Dec 14 09:32:00.655 INFO [stderr]    |
Dec 14 09:32:00.655 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:32:00.655 INFO [stderr] 
Dec 14 09:32:00.655 INFO [stderr] warning: variant is never constructed: `Move`
Dec 14 09:32:00.655 INFO [stderr]   --> src/chapter6/bin/main.rs:95:5
Dec 14 09:32:00.655 INFO [stderr]    |
Dec 14 09:32:00.655 INFO [stderr] 95 |     Move { x: i32, y: i32 },
Dec 14 09:32:00.655 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.655 INFO [stderr] 
Dec 14 09:32:00.655 INFO [stderr] warning: variant is never constructed: `ChangeColor`
Dec 14 09:32:00.655 INFO [stderr]   --> src/chapter6/bin/main.rs:97:5
Dec 14 09:32:00.655 INFO [stderr]    |
Dec 14 09:32:00.655 INFO [stderr] 97 |     ChangeColor(i32, i32, i32),
Dec 14 09:32:00.655 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.655 INFO [stderr] 
Dec 14 09:32:00.655 INFO [stderr] warning: variant is never constructed: `Alaska`
Dec 14 09:32:00.655 INFO [stderr]    --> src/chapter6/bin/main.rs:115:5
Dec 14 09:32:00.655 INFO [stderr]     |
Dec 14 09:32:00.655 INFO [stderr] 115 |     Alaska,
Dec 14 09:32:00.655 INFO [stderr]     |     ^^^^^^
Dec 14 09:32:00.655 INFO [stderr] 
Dec 14 09:32:00.655 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 14 09:32:00.655 INFO [stderr]    --> src/chapter6/bin/main.rs:121:5
Dec 14 09:32:00.655 INFO [stderr]     |
Dec 14 09:32:00.655 INFO [stderr] 121 |     Nickel,
Dec 14 09:32:00.655 INFO [stderr]     |     ^^^^^^
Dec 14 09:32:00.655 INFO [stderr] 
Dec 14 09:32:00.686 INFO [stderr] warning: function is never used: `max_ch`
Dec 14 09:32:00.686 INFO [stderr]   --> src/generics/bin/main.rs:51:1
Dec 14 09:32:00.686 INFO [stderr]    |
Dec 14 09:32:00.686 INFO [stderr] 51 | fn max_ch(list: &[char]) -> Option<char> {
Dec 14 09:32:00.686 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.686 INFO [stderr]    |
Dec 14 09:32:00.686 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:32:00.686 INFO [stderr] 
Dec 14 09:32:00.955 INFO [stderr] warning: function is never used: `middle_function`
Dec 14 09:32:00.955 INFO [stderr]  --> src/communicator/lib/mod.rs:6:5
Dec 14 09:32:00.955 INFO [stderr]   |
Dec 14 09:32:00.956 INFO [stderr] 6 |     pub fn middle_function() {
Dec 14 09:32:00.956 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.956 INFO [stderr]   |
Dec 14 09:32:00.956 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 14 09:32:00.956 INFO [stderr] 
Dec 14 09:32:00.956 INFO [stderr] warning: function is never used: `middle_secret_function`
Dec 14 09:32:00.956 INFO [stderr]   --> src/communicator/lib/mod.rs:10:5
Dec 14 09:32:00.956 INFO [stderr]    |
Dec 14 09:32:00.956 INFO [stderr] 10 |     fn middle_secret_function() {
Dec 14 09:32:00.956 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.956 INFO [stderr] 
Dec 14 09:32:00.956 INFO [stderr] warning: function is never used: `inner_function`
Dec 14 09:32:00.956 INFO [stderr]   --> src/communicator/lib/mod.rs:17:9
Dec 14 09:32:00.956 INFO [stderr]    |
Dec 14 09:32:00.956 INFO [stderr] 17 |         pub fn inner_function() {}
Dec 14 09:32:00.956 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.956 INFO [stderr] 
Dec 14 09:32:00.956 INFO [stderr] warning: function is never used: `secret_function`
Dec 14 09:32:00.956 INFO [stderr]   --> src/communicator/lib/mod.rs:19:9
Dec 14 09:32:00.956 INFO [stderr]    |
Dec 14 09:32:00.956 INFO [stderr] 19 |         fn secret_function() {
Dec 14 09:32:00.956 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.956 INFO [stderr] 
Dec 14 09:32:00.956 INFO [stderr] warning: function is never used: `inner_function`
Dec 14 09:32:00.956 INFO [stderr]   --> src/communicator/lib/mod.rs:26:13
Dec 14 09:32:00.956 INFO [stderr]    |
Dec 14 09:32:00.956 INFO [stderr] 26 |             pub fn inner_function() {
Dec 14 09:32:00.956 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:00.956 INFO [stderr] 
Dec 14 09:32:00.956 INFO [stderr] warning: function is never used: `try_me`
Dec 14 09:32:00.956 INFO [stderr]   --> src/communicator/lib/mod.rs:56:1
Dec 14 09:32:00.956 INFO [stderr]    |
Dec 14 09:32:00.956 INFO [stderr] 56 | fn try_me() {
Dec 14 09:32:00.956 INFO [stderr]    | ^^^^^^^^^^^
Dec 14 09:32:00.956 INFO [stderr] 
Dec 14 09:32:01.003 INFO [stderr] warning: unused variable: `t`
Dec 14 09:32:01.003 INFO [stderr]   --> src/traits/bin/main.rs:83:24
Dec 14 09:32:01.003 INFO [stderr]    |
Dec 14 09:32:01.003 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 14 09:32:01.003 INFO [stderr]    |                        ^ help: consider using `_t` instead
Dec 14 09:32:01.003 INFO [stderr]    |
Dec 14 09:32:01.003 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 09:32:01.003 INFO [stderr] 
Dec 14 09:32:01.003 INFO [stderr] warning: unused variable: `u`
Dec 14 09:32:01.003 INFO [stderr]   --> src/traits/bin/main.rs:83:30
Dec 14 09:32:01.003 INFO [stderr]    |
Dec 14 09:32:01.003 INFO [stderr] 83 | fn some_function<T, U>(t: T, u: U) -> i32
Dec 14 09:32:01.003 INFO [stderr]    |                              ^ help: consider using `_u` instead
Dec 14 09:32:01.003 INFO [stderr] 
Dec 14 09:32:01.011 INFO [stderr] warning: function is never used: `some_function`
Dec 14 09:32:01.011 INFO [stderr]   --> src/traits/bin/main.rs:83:1
Dec 14 09:32:01.011 INFO [stderr]    |
Dec 14 09:32:01.011 INFO [stderr] 83 | / fn some_function<T, U>(t: T, u: U) -> i32
Dec 14 09:32:01.011 INFO [stderr] 84 | |     where T: std::fmt::Display + Clone,
Dec 14 09:32:01.011 INFO [stderr] 85 | |           U: Clone + std::fmt::Debug {
Dec 14 09:32:01.011 INFO [stderr] 86 | |     1
Dec 14 09:32:01.011 INFO [stderr] 87 | | }
Dec 14 09:32:01.011 INFO [stderr]    | |_^
Dec 14 09:32:01.011 INFO [stderr]    |
Dec 14 09:32:01.011 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:32:01.011 INFO [stderr] 
Dec 14 09:32:01.011 INFO [stderr] warning: struct is never constructed: `Pair`
Dec 14 09:32:01.011 INFO [stderr]   --> src/traits/bin/main.rs:92:1
Dec 14 09:32:01.011 INFO [stderr]    |
Dec 14 09:32:01.011 INFO [stderr] 92 | struct Pair<T> {
Dec 14 09:32:01.011 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 14 09:32:01.011 INFO [stderr] 
Dec 14 09:32:01.011 INFO [stderr] warning: method is never used: `new`
Dec 14 09:32:01.011 INFO [stderr]   --> src/traits/bin/main.rs:98:5
Dec 14 09:32:01.011 INFO [stderr]    |
Dec 14 09:32:01.011 INFO [stderr] 98 |     fn new(x: T, y: T) -> Self {
Dec 14 09:32:01.011 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:01.011 INFO [stderr] 
Dec 14 09:32:01.011 INFO [stderr] warning: method is never used: `cmp_display`
Dec 14 09:32:01.011 INFO [stderr]    --> src/traits/bin/main.rs:107:5
Dec 14 09:32:01.011 INFO [stderr]     |
Dec 14 09:32:01.011 INFO [stderr] 107 |     fn cmp_display(&self) {
Dec 14 09:32:01.011 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:01.011 INFO [stderr] 
Dec 14 09:32:01.092 INFO [stderr] warning: unused variable: `s`
Dec 14 09:32:01.092 INFO [stderr]  --> src/lifetimes/bin/main.rs:5:13
Dec 14 09:32:01.092 INFO [stderr]   |
Dec 14 09:32:01.092 INFO [stderr] 5 |         let s: &'static str = "asdsa";
Dec 14 09:32:01.092 INFO [stderr]   |             ^ help: consider using `_s` instead
Dec 14 09:32:01.092 INFO [stderr]   |
Dec 14 09:32:01.092 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:32:01.092 INFO [stderr] 
Dec 14 09:32:01.092 INFO [stderr] warning: unused variable: `y`
Dec 14 09:32:01.092 INFO [stderr]   --> src/lifetimes/bin/main.rs:40:29
Dec 14 09:32:01.092 INFO [stderr]    |
Dec 14 09:32:01.092 INFO [stderr] 40 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str {
Dec 14 09:32:01.092 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 14 09:32:01.092 INFO [stderr] 
Dec 14 09:32:01.092 INFO [stderr] warning: unused variable: `y`
Dec 14 09:32:01.092 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:29
Dec 14 09:32:01.092 INFO [stderr]    |
Dec 14 09:32:01.092 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 14 09:32:01.092 INFO [stderr]    |                             ^ help: consider using `_y` instead
Dec 14 09:32:01.092 INFO [stderr] 
Dec 14 09:32:01.111 INFO [stderr] warning: function is never used: `longest3`
Dec 14 09:32:01.111 INFO [stderr]   --> src/lifetimes/bin/main.rs:44:1
Dec 14 09:32:01.111 INFO [stderr]    |
Dec 14 09:32:01.111 INFO [stderr] 44 | fn longest3<'a>(x: &'a str, y: &str) -> &'a str {
Dec 14 09:32:01.111 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:01.111 INFO [stderr]    |
Dec 14 09:32:01.111 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:32:01.111 INFO [stderr] 
Dec 14 09:32:01.111 INFO [stderr] warning: field is never used: `a`
Dec 14 09:32:01.111 INFO [stderr]   --> src/lifetimes/bin/main.rs:50:5
Dec 14 09:32:01.111 INFO [stderr]    |
Dec 14 09:32:01.111 INFO [stderr] 50 |     a: String,
Dec 14 09:32:01.111 INFO [stderr]    |     ^^^^^^^^^
Dec 14 09:32:01.111 INFO [stderr] 
Dec 14 09:32:01.111 INFO [stderr] warning: method is never used: `level`
Dec 14 09:32:01.111 INFO [stderr]   --> src/lifetimes/bin/main.rs:54:5
Dec 14 09:32:01.111 INFO [stderr]    |
Dec 14 09:32:01.111 INFO [stderr] 54 |     fn level(&self) -> i32 {
Dec 14 09:32:01.111 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:01.111 INFO [stderr] 
Dec 14 09:32:01.111 INFO [stderr] warning: method is never used: `a`
Dec 14 09:32:01.111 INFO [stderr]   --> src/lifetimes/bin/main.rs:60:5
Dec 14 09:32:01.111 INFO [stderr]    |
Dec 14 09:32:01.111 INFO [stderr] 60 |     fn a(&self) -> &str {
Dec 14 09:32:01.111 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:01.111 INFO [stderr] 
Dec 14 09:32:01.111 INFO [stderr] warning: function is never used: `longest_with_an_announcement`
Dec 14 09:32:01.111 INFO [stderr]   --> src/lifetimes/bin/main.rs:67:1
Dec 14 09:32:01.111 INFO [stderr]    |
Dec 14 09:32:01.111 INFO [stderr] 67 | / fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
Dec 14 09:32:01.111 INFO [stderr] 68 | |     where T: Display
Dec 14 09:32:01.111 INFO [stderr] 69 | | {
Dec 14 09:32:01.111 INFO [stderr] 70 | |     println!("Announcement! {}", ann);
Dec 14 09:32:01.111 INFO [stderr] ...  |
Dec 14 09:32:01.111 INFO [stderr] 75 | |     }
Dec 14 09:32:01.111 INFO [stderr] 76 | | }
Dec 14 09:32:01.111 INFO [stderr]    | |_^
Dec 14 09:32:01.111 INFO [stderr] 
Dec 14 09:32:02.183 INFO [stderr] warning: unused variable: `black`
Dec 14 09:32:02.183 INFO [stderr]    --> src/chapter3/bin/main.rs:107:9
Dec 14 09:32:02.183 INFO [stderr]     |
Dec 14 09:32:02.183 INFO [stderr] 107 |     let black = Color(0, 0, 0);
Dec 14 09:32:02.183 INFO [stderr]     |         ^^^^^ help: consider using `_black` instead
Dec 14 09:32:02.183 INFO [stderr]     |
Dec 14 09:32:02.183 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 14 09:32:02.183 INFO [stderr] 
Dec 14 09:32:02.183 INFO [stderr] warning: unused variable: `origin`
Dec 14 09:32:02.183 INFO [stderr]    --> src/chapter3/bin/main.rs:108:9
Dec 14 09:32:02.183 INFO [stderr]     |
Dec 14 09:32:02.183 INFO [stderr] 108 |     let origin = Point(0, 0, 0);
Dec 14 09:32:02.183 INFO [stderr]     |         ^^^^^^ help: consider using `_origin` instead
Dec 14 09:32:02.183 INFO [stderr] 
Dec 14 09:32:02.190 INFO [stderr] warning: unused imports: `Red`, `Yellow`
Dec 14 09:32:02.190 INFO [stderr]  --> src/chapter7/bin/main.rs:3:34
Dec 14 09:32:02.190 INFO [stderr]   |
Dec 14 09:32:02.190 INFO [stderr] 3 | use communicator::TrafficLight::{Red, Yellow};
Dec 14 09:32:02.191 INFO [stderr]   |                                  ^^^  ^^^^^^
Dec 14 09:32:02.191 INFO [stderr]   |
Dec 14 09:32:02.191 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 14 09:32:02.191 INFO [stderr] 
Dec 14 09:32:02.202 INFO [stderr] warning: unused variable: `red`
Dec 14 09:32:02.202 INFO [stderr]  --> src/chapter7/bin/main.rs:8:9
Dec 14 09:32:02.202 INFO [stderr]   |
Dec 14 09:32:02.202 INFO [stderr] 8 |     let red = Red;
Dec 14 09:32:02.202 INFO [stderr]   |         ^^^ help: consider using `_red` instead
Dec 14 09:32:02.202 INFO [stderr]   |
Dec 14 09:32:02.202 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:32:02.202 INFO [stderr] 
Dec 14 09:32:02.202 INFO [stderr] warning: unused variable: `yellow`
Dec 14 09:32:02.202 INFO [stderr]  --> src/chapter7/bin/main.rs:9:9
Dec 14 09:32:02.202 INFO [stderr]   |
Dec 14 09:32:02.202 INFO [stderr] 9 |     let yellow = Yellow;
Dec 14 09:32:02.202 INFO [stderr]   |         ^^^^^^ help: consider using `_yellow` instead
Dec 14 09:32:02.202 INFO [stderr] 
Dec 14 09:32:02.202 INFO [stderr] warning: unused variable: `green`
Dec 14 09:32:02.202 INFO [stderr]   --> src/chapter7/bin/main.rs:10:9
Dec 14 09:32:02.202 INFO [stderr]    |
Dec 14 09:32:02.202 INFO [stderr] 10 |     let green = communicator::TrafficLight::Green;
Dec 14 09:32:02.202 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 14 09:32:02.202 INFO [stderr] 
Dec 14 09:32:02.202 INFO [stderr] warning: unused variable: `green`
Dec 14 09:32:02.202 INFO [stderr]   --> src/chapter7/bin/main.rs:14:9
Dec 14 09:32:02.202 INFO [stderr]    |
Dec 14 09:32:02.202 INFO [stderr] 14 |     let green = Green;
Dec 14 09:32:02.202 INFO [stderr]    |         ^^^^^ help: consider using `_green` instead
Dec 14 09:32:02.202 INFO [stderr] 
Dec 14 09:32:02.211 INFO [stderr] warning: unused variable: `black`
Dec 14 09:32:02.211 INFO [stderr]   --> src/chapter5/bin/main.rs:23:9
Dec 14 09:32:02.211 INFO [stderr]    |
Dec 14 09:32:02.211 INFO [stderr] 23 |     let black = Color(0, 0, 0);
Dec 14 09:32:02.211 INFO [stderr]    |         ^^^^^ help: consider using `_black` instead
Dec 14 09:32:02.211 INFO [stderr]    |
Dec 14 09:32:02.211 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 09:32:02.211 INFO [stderr] 
Dec 14 09:32:02.211 INFO [stderr] warning: unused variable: `origin`
Dec 14 09:32:02.211 INFO [stderr]   --> src/chapter5/bin/main.rs:24:9
Dec 14 09:32:02.211 INFO [stderr]    |
Dec 14 09:32:02.211 INFO [stderr] 24 |     let origin = Point(0, 0, 0);
Dec 14 09:32:02.211 INFO [stderr]    |         ^^^^^^ help: consider using `_origin` instead
Dec 14 09:32:02.211 INFO [stderr] 
Dec 14 09:32:02.227 INFO [stderr] warning: function is never used: `gives_ownership`
Dec 14 09:32:02.227 INFO [stderr]    --> src/chapter3/bin/main.rs:119:1
Dec 14 09:32:02.227 INFO [stderr]     |
Dec 14 09:32:02.227 INFO [stderr] 119 | fn gives_ownership() -> String {
Dec 14 09:32:02.227 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.227 INFO [stderr]     |
Dec 14 09:32:02.227 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 14 09:32:02.227 INFO [stderr] 
Dec 14 09:32:02.227 INFO [stderr] warning: function is never used: `takes_and_gives_back`
Dec 14 09:32:02.227 INFO [stderr]    --> src/chapter3/bin/main.rs:124:1
Dec 14 09:32:02.227 INFO [stderr]     |
Dec 14 09:32:02.227 INFO [stderr] 124 | fn takes_and_gives_back(a_string: String) -> String {
Dec 14 09:32:02.227 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.227 INFO [stderr] 
Dec 14 09:32:02.227 INFO [stderr] warning: function is never used: `no_dangle`
Dec 14 09:32:02.227 INFO [stderr]    --> src/chapter3/bin/main.rs:149:1
Dec 14 09:32:02.227 INFO [stderr]     |
Dec 14 09:32:02.227 INFO [stderr] 149 | fn no_dangle() -> String {
Dec 14 09:32:02.227 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.227 INFO [stderr] 
Dec 14 09:32:02.227 INFO [stderr] warning: function is never used: `build_user`
Dec 14 09:32:02.227 INFO [stderr]    --> src/chapter3/bin/main.rs:187:1
Dec 14 09:32:02.227 INFO [stderr]     |
Dec 14 09:32:02.227 INFO [stderr] 187 | fn build_user(email: String, username: String) -> User {
Dec 14 09:32:02.227 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.227 INFO [stderr] 
Dec 14 09:32:02.235 INFO [stderr] warning: function is never used: `build_user`
Dec 14 09:32:02.235 INFO [stderr]    --> src/chapter5/bin/main.rs:103:1
Dec 14 09:32:02.235 INFO [stderr]     |
Dec 14 09:32:02.235 INFO [stderr] 103 | fn build_user(email: String, username: String) -> User {
Dec 14 09:32:02.235 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.235 INFO [stderr]     |
Dec 14 09:32:02.235 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 14 09:32:02.235 INFO [stderr] 
Dec 14 09:32:02.261 INFO [stderr] warning: unused variable: `v`
Dec 14 09:32:02.261 INFO [stderr]  --> src/errors/bin/main.rs:5:9
Dec 14 09:32:02.261 INFO [stderr]   |
Dec 14 09:32:02.261 INFO [stderr] 5 |     let v = vec![1, 2, 3];
Dec 14 09:32:02.261 INFO [stderr]   |         ^ help: consider using `_v` instead
Dec 14 09:32:02.261 INFO [stderr]   |
Dec 14 09:32:02.261 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 14 09:32:02.261 INFO [stderr] 
Dec 14 09:32:02.261 INFO [stderr] warning: unused variable: `f`
Dec 14 09:32:02.261 INFO [stderr]   --> src/errors/bin/main.rs:23:9
Dec 14 09:32:02.261 INFO [stderr]    |
Dec 14 09:32:02.261 INFO [stderr] 23 |     let f = match f {
Dec 14 09:32:02.261 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 14 09:32:02.261 INFO [stderr] 
Dec 14 09:32:02.261 INFO [stderr] warning: function is never used: `read_username_from_file`
Dec 14 09:32:02.261 INFO [stderr]   --> src/errors/bin/main.rs:44:1
Dec 14 09:32:02.261 INFO [stderr]    |
Dec 14 09:32:02.261 INFO [stderr] 44 | fn read_username_from_file() -> Result<String, io::Error> {
Dec 14 09:32:02.261 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.261 INFO [stderr]    |
Dec 14 09:32:02.261 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 09:32:02.261 INFO [stderr] 
Dec 14 09:32:02.261 INFO [stderr] warning: function is never used: `read_username_from_file2`
Dec 14 09:32:02.261 INFO [stderr]   --> src/errors/bin/main.rs:60:1
Dec 14 09:32:02.261 INFO [stderr]    |
Dec 14 09:32:02.261 INFO [stderr] 60 | fn read_username_from_file2() -> Result<String, io::Error> {
Dec 14 09:32:02.261 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 09:32:02.261 INFO [stderr] 
Dec 14 09:32:02.271 INFO [stderr] warning: function `openFile` should have a snake case name such as `open_file`
Dec 14 09:32:02.271 INFO [stderr]   --> src/errors/bin/main.rs:20:1
Dec 14 09:32:02.271 INFO [stderr]    |
Dec 14 09:32:02.271 INFO [stderr] 20 | / fn openFile() {
Dec 14 09:32:02.271 INFO [stderr] 21 | |     let f = File::open("hello.txt");
Dec 14 09:32:02.271 INFO [stderr] 22 | |
Dec 14 09:32:02.271 INFO [stderr] 23 | |     let f = match f {
Dec 14 09:32:02.271 INFO [stderr] ...  |
Dec 14 09:32:02.271 INFO [stderr] 40 | |     };
Dec 14 09:32:02.271 INFO [stderr] 41 | | }
Dec 14 09:32:02.271 INFO [stderr]    | |_^
Dec 14 09:32:02.271 INFO [stderr]    |
Dec 14 09:32:02.271 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 14 09:32:02.271 INFO [stderr] 
Dec 14 09:32:02.763 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.13s
Dec 14 09:32:02.767 INFO [stderr] su: No module specific data is present
Dec 14 09:32:03.619 INFO running `"docker" "inspect" "fe6d8d50289704953a99abad8c02967977d8e563a77641dce99f4fb22f1f383b"`
Dec 14 09:32:03.893 INFO running `"docker" "rm" "-f" "fe6d8d50289704953a99abad8c02967977d8e563a77641dce99f4fb22f1f383b"`
Dec 14 09:32:04.095 INFO [stdout] fe6d8d50289704953a99abad8c02967977d8e563a77641dce99f4fb22f1f383b
Dec 14 09:32:04.097 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 14 09:32:04.529 INFO [stdout] 31a8bdd3ea02364650ec874b919d688589377104b7b095eb78cc4f235840a5f1
Dec 14 09:32:04.532 INFO running `"docker" "start" "-a" "31a8bdd3ea02364650ec874b919d688589377104b7b095eb78cc4f235840a5f1"`
Dec 14 09:32:05.876 INFO [stderr] usermod: no changes
Dec 14 09:32:05.943 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
Dec 14 09:32:05.951 INFO [stderr]      Running /target/debug/deps/communicator-c31dd68306c282c4
Dec 14 09:32:05.951 INFO [stdout] 
Dec 14 09:32:05.951 INFO [stdout] running 9 tests
Dec 14 09:32:05.951 INFO [stdout] test tests::expensive_test ... ignored
Dec 14 09:32:05.951 INFO [stdout] test tests::this_test_will_pass ... ok
Dec 14 09:32:05.951 INFO [stdout] test tests::smaller_cannot_hold_larger ... ok
Dec 14 09:32:05.951 INFO [stdout] test tests::one_hundred ... ok
Dec 14 09:32:05.951 INFO [stdout] test tests::larger_can_hold_smaller ... ok
Dec 14 09:32:05.951 INFO [stdout] test tests::it_adds_two ... ok
Dec 14 09:32:05.951 INFO [stdout] test tests::exploration ... ok
Dec 14 09:32:05.951 INFO [stdout] test tests::add_three_and_two ... ok
Dec 14 09:32:05.959 INFO [stdout] test tests::add_two_and_two ... ok
Dec 14 09:32:05.959 INFO [stdout] 
Dec 14 09:32:05.959 INFO [stdout] test result: ok. 8 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.959 INFO [stdout] 
Dec 14 09:32:05.959 INFO [stdout] 
Dec 14 09:32:05.959 INFO [stdout] running 0 tests
Dec 14 09:32:05.959 INFO [stdout] 
Dec 14 09:32:05.959 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.959 INFO [stdout] 
Dec 14 09:32:05.959 INFO [stderr]      Running /target/debug/deps/chapter3-c3c6d51c3fafb2d8
Dec 14 09:32:05.963 INFO [stderr]      Running /target/debug/deps/chapter5-11b194d0ce3eb0b4
Dec 14 09:32:05.963 INFO [stderr]      Running /target/debug/deps/chapter6-9bb37eaf49e44126
Dec 14 09:32:05.963 INFO [stderr]      Running /target/debug/deps/chapter7-c00177deebfb81ee
Dec 14 09:32:05.963 INFO [stdout] 
Dec 14 09:32:05.963 INFO [stdout] running 0 tests
Dec 14 09:32:05.963 INFO [stdout] 
Dec 14 09:32:05.963 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.963 INFO [stdout] 
Dec 14 09:32:05.963 INFO [stdout] 
Dec 14 09:32:05.963 INFO [stdout] running 0 tests
Dec 14 09:32:05.963 INFO [stdout] 
Dec 14 09:32:05.963 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.963 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stdout] running 0 tests
Dec 14 09:32:05.967 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.967 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stdout] running 0 tests
Dec 14 09:32:05.967 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.967 INFO [stdout] 
Dec 14 09:32:05.967 INFO [stderr]      Running /target/debug/deps/collections-085984c2d6b16bab
Dec 14 09:32:05.967 INFO [stderr]      Running /target/debug/deps/errors-17c9c6a4e89ab9e5
Dec 14 09:32:05.971 INFO [stdout] 
Dec 14 09:32:05.971 INFO [stdout] running 0 tests
Dec 14 09:32:05.971 INFO [stdout] 
Dec 14 09:32:05.971 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.971 INFO [stdout] 
Dec 14 09:32:05.971 INFO [stderr]      Running /target/debug/deps/generics-d53894dcdf3c6b98
Dec 14 09:32:05.979 INFO [stderr]      Running /target/debug/deps/lifetimes-2ccb2214d8e3b07f
Dec 14 09:32:05.979 INFO [stderr]      Running /target/debug/deps/minigrep-aae90b567132e381
Dec 14 09:32:05.979 INFO [stderr]      Running /target/debug/deps/traits-4d89effecc6a63bd
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] running 0 tests
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] running 0 tests
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] running 0 tests
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.979 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.979 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stdout] running 0 tests
Dec 14 09:32:05.995 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.995 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stdout] running 1 test
Dec 14 09:32:05.995 INFO [stdout] test it_adds_two_ingrt ... ok
Dec 14 09:32:05.995 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:05.995 INFO [stdout] 
Dec 14 09:32:05.995 INFO [stderr]      Running /target/debug/deps/integration_test-cdb65ca9ac8b0e16
Dec 14 09:32:05.995 INFO [stderr]    Doc-tests communicator
Dec 14 09:32:06.778 INFO [stdout] 
Dec 14 09:32:06.778 INFO [stdout] running 0 tests
Dec 14 09:32:06.778 INFO [stdout] 
Dec 14 09:32:06.778 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 09:32:06.778 INFO [stdout] 
Dec 14 09:32:06.803 INFO [stderr] su: No module specific data is present
Dec 14 09:32:07.915 INFO running `"docker" "inspect" "31a8bdd3ea02364650ec874b919d688589377104b7b095eb78cc4f235840a5f1"`
Dec 14 09:32:08.128 INFO running `"docker" "rm" "-f" "31a8bdd3ea02364650ec874b919d688589377104b7b095eb78cc4f235840a5f1"`
Dec 14 09:32:08.341 INFO [stdout] 31a8bdd3ea02364650ec874b919d688589377104b7b095eb78cc4f235840a5f1