Dec 06 03:53:45.210 INFO testing chrisp9/rust_exploration against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 03:53:45.210 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 03:53:45.409 INFO [stdout] 3e64eddf96821e4c7e410f1afb5ad60430e231272f4eb69a47cc8c39e3f71431
Dec 06 03:53:45.412 INFO running `"docker" "start" "-a" "3e64eddf96821e4c7e410f1afb5ad60430e231272f4eb69a47cc8c39e3f71431"`
Dec 06 03:53:45.775 INFO [stderr] usermod: no changes
Dec 06 03:53:45.813 INFO [stderr]    Compiling rust_exploration v0.1.0 (/source)
Dec 06 03:53:46.368 INFO [stderr] warning: unused variable: `num`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:177:45
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 177 |     let mut expensive_result = Cacher::new(|num| {
Dec 06 03:53:46.369 INFO [stderr]     |                                             ^^^ help: consider using `_num` instead
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `equal_to_x`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:212:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 212 |     let equal_to_x = |z : u32| z == x;
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^^^^^^ help: consider using `_equal_to_x` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `y`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:213:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 213 |     let y = 4;
Dec 06 03:53:46.369 INFO [stderr]     |         ^ help: consider using `_y` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `res`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:229:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 229 |     let res: Vec<_> = v1.iter().map(|x| x + 1).collect();
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^ help: consider using `_res` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `total`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:236:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 236 |     let total: i32 = v1_iter.sum();
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^ help: consider using `_total` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `item`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:289:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 289 |     let item = map.get(&key).unwrap();
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^ help: consider using `_item` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `s3`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:296:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 296 |     let s3 = s1 + &s2;
Dec 06 03:53:46.369 INFO [stderr]     |         ^^ help: consider using `_s3` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `v`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:306:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 306 |     let v: Vec<i32> = Vec::new();
Dec 06 03:53:46.369 INFO [stderr]     |         ^ help: consider using `_v` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `third`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:309:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 309 |     let third: &i32 = &v[2];
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^ help: consider using `_third` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `some_number`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:372:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 372 |     let some_number = Some(5);
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^^^^^^^ help: consider using `_some_number` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `some_string`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:373:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 373 |     let some_string = Some("A string");
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^^^^^^^ help: consider using `_some_string` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `absent_number`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:375:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 375 |     let absent_number : Option<i32> = None;
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^^^^^^^^^ help: consider using `_absent_number` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.369 INFO [stderr] warning: unused variable: `rect3`
Dec 06 03:53:46.369 INFO [stderr]    --> src/main.rs:387:9
Dec 06 03:53:46.369 INFO [stderr]     |
Dec 06 03:53:46.369 INFO [stderr] 387 |     let rect3 = Rectangle {width: 60, height: 45};
Dec 06 03:53:46.369 INFO [stderr]     |         ^^^^^ help: consider using `_rect3` instead
Dec 06 03:53:46.369 INFO [stderr] 
Dec 06 03:53:46.408 INFO [stderr] warning: struct is never constructed: `NewsArticle`
Dec 06 03:53:46.408 INFO [stderr]  --> src/news_aggregator/mod.rs:5:5
Dec 06 03:53:46.408 INFO [stderr]   |
Dec 06 03:53:46.408 INFO [stderr] 5 |     pub struct NewsArticle {
Dec 06 03:53:46.408 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.408 INFO [stderr]   |
Dec 06 03:53:46.408 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 03:53:46.408 INFO [stderr] 
Dec 06 03:53:46.408 INFO [stderr] warning: struct is never constructed: `Tweet`
Dec 06 03:53:46.408 INFO [stderr]   --> src/news_aggregator/mod.rs:18:5
Dec 06 03:53:46.408 INFO [stderr]    |
Dec 06 03:53:46.408 INFO [stderr] 18 |     pub struct Tweet {
Dec 06 03:53:46.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 06 03:53:46.408 INFO [stderr] 
Dec 06 03:53:46.408 INFO [stderr] warning: struct is never constructed: `Pair`
Dec 06 03:53:46.408 INFO [stderr]   --> src/main.rs:18:1
Dec 06 03:53:46.408 INFO [stderr]    |
Dec 06 03:53:46.408 INFO [stderr] 18 | struct Pair<T> {
Dec 06 03:53:46.408 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 06 03:53:46.408 INFO [stderr] 
Dec 06 03:53:46.408 INFO [stderr] warning: method is never used: `new`
Dec 06 03:53:46.408 INFO [stderr]   --> src/main.rs:24:5
Dec 06 03:53:46.408 INFO [stderr]    |
Dec 06 03:53:46.408 INFO [stderr] 24 |     fn new(x: T, y: T) -> Self {
Dec 06 03:53:46.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.408 INFO [stderr] 
Dec 06 03:53:46.408 INFO [stderr] warning: method is never used: `cmp_display`
Dec 06 03:53:46.408 INFO [stderr]   --> src/main.rs:33:5
Dec 06 03:53:46.408 INFO [stderr]    |
Dec 06 03:53:46.408 INFO [stderr] 33 |     fn cmp_display(&self) {
Dec 06 03:53:46.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.408 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: struct is never constructed: `User`
Dec 06 03:53:46.410 INFO [stderr]   --> src/main.rs:42:1
Dec 06 03:53:46.410 INFO [stderr]    |
Dec 06 03:53:46.410 INFO [stderr] 42 | struct User {
Dec 06 03:53:46.410 INFO [stderr]    | ^^^^^^^^^^^
Dec 06 03:53:46.410 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: struct is never constructed: `Rectangle`
Dec 06 03:53:46.410 INFO [stderr]   --> src/main.rs:49:1
Dec 06 03:53:46.410 INFO [stderr]    |
Dec 06 03:53:46.410 INFO [stderr] 49 | struct Rectangle {
Dec 06 03:53:46.410 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 06 03:53:46.410 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: method is never used: `area`
Dec 06 03:53:46.410 INFO [stderr]   --> src/main.rs:55:5
Dec 06 03:53:46.410 INFO [stderr]    |
Dec 06 03:53:46.410 INFO [stderr] 55 |     fn area(&self) -> u32 {
Dec 06 03:53:46.410 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.410 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: method is never used: `can_hold`
Dec 06 03:53:46.410 INFO [stderr]   --> src/main.rs:59:5
Dec 06 03:53:46.410 INFO [stderr]    |
Dec 06 03:53:46.410 INFO [stderr] 59 |     fn can_hold(&self, other: &Rectangle) -> bool {
Dec 06 03:53:46.410 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.410 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: method is never used: `square`
Dec 06 03:53:46.410 INFO [stderr]   --> src/main.rs:63:5
Dec 06 03:53:46.410 INFO [stderr]    |
Dec 06 03:53:46.410 INFO [stderr] 63 |     fn square(size: u32) -> Rectangle {
Dec 06 03:53:46.410 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.410 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: enum is never used: `IpAddrKind`
Dec 06 03:53:46.410 INFO [stderr]   --> src/main.rs:68:1
Dec 06 03:53:46.410 INFO [stderr]    |
Dec 06 03:53:46.410 INFO [stderr] 68 | enum IpAddrKind {
Dec 06 03:53:46.410 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 03:53:46.410 INFO [stderr] 
Dec 06 03:53:46.410 INFO [stderr] warning: enum is never used: `UsState`
Dec 06 03:53:46.411 INFO [stderr]   --> src/main.rs:74:1
Dec 06 03:53:46.411 INFO [stderr]    |
Dec 06 03:53:46.411 INFO [stderr] 74 | enum UsState {
Dec 06 03:53:46.411 INFO [stderr]    | ^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: enum is never used: `Coin`
Dec 06 03:53:46.411 INFO [stderr]   --> src/main.rs:80:1
Dec 06 03:53:46.411 INFO [stderr]    |
Dec 06 03:53:46.411 INFO [stderr] 80 | enum Coin {
Dec 06 03:53:46.411 INFO [stderr]    | ^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: enum is never used: `Message`
Dec 06 03:53:46.411 INFO [stderr]   --> src/main.rs:87:1
Dec 06 03:53:46.411 INFO [stderr]    |
Dec 06 03:53:46.411 INFO [stderr] 87 | enum Message {
Dec 06 03:53:46.411 INFO [stderr]    | ^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: method is never used: `call`
Dec 06 03:53:46.411 INFO [stderr]   --> src/main.rs:95:5
Dec 06 03:53:46.411 INFO [stderr]    |
Dec 06 03:53:46.411 INFO [stderr] 95 |     fn call(&self) {
Dec 06 03:53:46.411 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `largest`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:100:2
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 100 |  fn largest<T : PartialOrd>(list: &[T]) -> &T {
Dec 06 03:53:46.411 INFO [stderr]     |  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: struct is never constructed: `Point`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:112:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 112 | struct Point<T> {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `shoes_in_my_size`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:123:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 123 | fn shoes_in_my_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `simulated_expensive_calculation`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:204:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 204 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `closure_capturing_context`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:210:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 210 | fn closure_capturing_context() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `iterators`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:217:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 217 | fn iterators() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `iterator_map`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:226:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 226 | fn iterator_map() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `iterator_sum`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:232:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 232 | fn iterator_sum() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `news_aggregate`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:269:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 269 | fn news_aggregate() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `vector`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:305:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 305 | fn vector() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: struct is never constructed: `Counter`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:325:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 325 | struct Counter {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: method is never used: `new`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:330:5
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 330 |     fn new() -> Counter {
Dec 06 03:53:46.411 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `if_let`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:351:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 351 | fn if_let() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `value_in_cents`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:359:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 359 | fn value_in_cents(coin : Coin) -> u32 {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.411 INFO [stderr] 
Dec 06 03:53:46.411 INFO [stderr] warning: function is never used: `option`
Dec 06 03:53:46.411 INFO [stderr]    --> src/main.rs:371:1
Dec 06 03:53:46.411 INFO [stderr]     |
Dec 06 03:53:46.411 INFO [stderr] 371 | fn option() {
Dec 06 03:53:46.411 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `messages`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:378:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 378 | fn messages() {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `rectangles`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:383:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 383 | fn rectangles() {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `build_user`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:395:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 395 | fn build_user(email: String, username: String) -> User {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `coins`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:404:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 404 | fn coins() {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `slices`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:409:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 409 | fn slices() {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `takes_ownership`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:419:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 419 | fn takes_ownership(some_string: String) {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `makes_copy`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:423:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 423 | fn makes_copy(some_integer: i32) {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `first_word`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:427:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 427 | fn first_word(s: &String) -> usize {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: function is never used: `guess_number`
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:440:1
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 440 | fn guess_number() {
Dec 06 03:53:46.412 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:46.412 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:53:46.412 INFO [stderr]    --> src/main.rs:245:5
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr] 245 |     read_username_from_file();
Dec 06 03:53:46.412 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:46.412 INFO [stderr]     |
Dec 06 03:53:46.412 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 06 03:53:46.412 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:53:46.412 INFO [stderr] 
Dec 06 03:53:47.238 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
Dec 06 03:53:47.241 INFO [stderr] su: No module specific data is present
Dec 06 03:53:48.095 INFO running `"docker" "inspect" "3e64eddf96821e4c7e410f1afb5ad60430e231272f4eb69a47cc8c39e3f71431"`
Dec 06 03:53:48.164 INFO running `"docker" "rm" "-f" "3e64eddf96821e4c7e410f1afb5ad60430e231272f4eb69a47cc8c39e3f71431"`
Dec 06 03:53:48.276 INFO [stdout] 3e64eddf96821e4c7e410f1afb5ad60430e231272f4eb69a47cc8c39e3f71431
Dec 06 03:53:48.278 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 03:53:48.518 INFO [stdout] 4132b25e5cc122056cd44b034d9049ef39143c72f6b138b564fb50812feb8574
Dec 06 03:53:48.528 INFO running `"docker" "start" "-a" "4132b25e5cc122056cd44b034d9049ef39143c72f6b138b564fb50812feb8574"`
Dec 06 03:53:50.000 INFO [stderr] usermod: no changes
Dec 06 03:53:50.043 INFO [stderr]    Compiling rust_exploration v0.1.0 (/source)
Dec 06 03:53:50.688 INFO [stderr] warning: unused variable: `num`
Dec 06 03:53:50.688 INFO [stderr]    --> src/main.rs:177:45
Dec 06 03:53:50.688 INFO [stderr]     |
Dec 06 03:53:50.688 INFO [stderr] 177 |     let mut expensive_result = Cacher::new(|num| {
Dec 06 03:53:50.689 INFO [stderr]     |                                             ^^^ help: consider using `_num` instead
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `equal_to_x`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:212:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 212 |     let equal_to_x = |z : u32| z == x;
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^^^^^^ help: consider using `_equal_to_x` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `y`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:213:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 213 |     let y = 4;
Dec 06 03:53:50.689 INFO [stderr]     |         ^ help: consider using `_y` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `res`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:229:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 229 |     let res: Vec<_> = v1.iter().map(|x| x + 1).collect();
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^ help: consider using `_res` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `total`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:236:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 236 |     let total: i32 = v1_iter.sum();
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^ help: consider using `_total` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `item`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:289:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 289 |     let item = map.get(&key).unwrap();
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^ help: consider using `_item` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `s3`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:296:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 296 |     let s3 = s1 + &s2;
Dec 06 03:53:50.689 INFO [stderr]     |         ^^ help: consider using `_s3` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `v`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:306:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 306 |     let v: Vec<i32> = Vec::new();
Dec 06 03:53:50.689 INFO [stderr]     |         ^ help: consider using `_v` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `third`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:309:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 309 |     let third: &i32 = &v[2];
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^ help: consider using `_third` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `some_number`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:372:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 372 |     let some_number = Some(5);
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^^^^^^^ help: consider using `_some_number` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `some_string`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:373:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 373 |     let some_string = Some("A string");
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^^^^^^^ help: consider using `_some_string` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `absent_number`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:375:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 375 |     let absent_number : Option<i32> = None;
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^^^^^^^^^ help: consider using `_absent_number` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.689 INFO [stderr] warning: unused variable: `rect3`
Dec 06 03:53:50.689 INFO [stderr]    --> src/main.rs:387:9
Dec 06 03:53:50.689 INFO [stderr]     |
Dec 06 03:53:50.689 INFO [stderr] 387 |     let rect3 = Rectangle {width: 60, height: 45};
Dec 06 03:53:50.689 INFO [stderr]     |         ^^^^^ help: consider using `_rect3` instead
Dec 06 03:53:50.689 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: struct is never constructed: `NewsArticle`
Dec 06 03:53:50.749 INFO [stderr]  --> src/news_aggregator/mod.rs:5:5
Dec 06 03:53:50.749 INFO [stderr]   |
Dec 06 03:53:50.749 INFO [stderr] 5 |     pub struct NewsArticle {
Dec 06 03:53:50.749 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.749 INFO [stderr]   |
Dec 06 03:53:50.749 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 03:53:50.749 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: struct is never constructed: `Tweet`
Dec 06 03:53:50.749 INFO [stderr]   --> src/news_aggregator/mod.rs:18:5
Dec 06 03:53:50.749 INFO [stderr]    |
Dec 06 03:53:50.749 INFO [stderr] 18 |     pub struct Tweet {
Dec 06 03:53:50.749 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 06 03:53:50.749 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: struct is never constructed: `Pair`
Dec 06 03:53:50.749 INFO [stderr]   --> src/main.rs:18:1
Dec 06 03:53:50.749 INFO [stderr]    |
Dec 06 03:53:50.749 INFO [stderr] 18 | struct Pair<T> {
Dec 06 03:53:50.749 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 06 03:53:50.749 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: method is never used: `new`
Dec 06 03:53:50.749 INFO [stderr]   --> src/main.rs:24:5
Dec 06 03:53:50.749 INFO [stderr]    |
Dec 06 03:53:50.749 INFO [stderr] 24 |     fn new(x: T, y: T) -> Self {
Dec 06 03:53:50.749 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.749 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: method is never used: `cmp_display`
Dec 06 03:53:50.749 INFO [stderr]   --> src/main.rs:33:5
Dec 06 03:53:50.749 INFO [stderr]    |
Dec 06 03:53:50.749 INFO [stderr] 33 |     fn cmp_display(&self) {
Dec 06 03:53:50.749 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.749 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: struct is never constructed: `User`
Dec 06 03:53:50.749 INFO [stderr]   --> src/main.rs:42:1
Dec 06 03:53:50.749 INFO [stderr]    |
Dec 06 03:53:50.749 INFO [stderr] 42 | struct User {
Dec 06 03:53:50.749 INFO [stderr]    | ^^^^^^^^^^^
Dec 06 03:53:50.749 INFO [stderr] 
Dec 06 03:53:50.749 INFO [stderr] warning: struct is never constructed: `Rectangle`
Dec 06 03:53:50.749 INFO [stderr]   --> src/main.rs:49:1
Dec 06 03:53:50.749 INFO [stderr]    |
Dec 06 03:53:50.749 INFO [stderr] 49 | struct Rectangle {
Dec 06 03:53:50.750 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: method is never used: `area`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:55:5
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 55 |     fn area(&self) -> u32 {
Dec 06 03:53:50.750 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: method is never used: `can_hold`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:59:5
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 59 |     fn can_hold(&self, other: &Rectangle) -> bool {
Dec 06 03:53:50.750 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: method is never used: `square`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:63:5
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 63 |     fn square(size: u32) -> Rectangle {
Dec 06 03:53:50.750 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: enum is never used: `IpAddrKind`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:68:1
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 68 | enum IpAddrKind {
Dec 06 03:53:50.750 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: enum is never used: `UsState`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:74:1
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 74 | enum UsState {
Dec 06 03:53:50.750 INFO [stderr]    | ^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: enum is never used: `Coin`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:80:1
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 80 | enum Coin {
Dec 06 03:53:50.750 INFO [stderr]    | ^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: enum is never used: `Message`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:87:1
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 87 | enum Message {
Dec 06 03:53:50.750 INFO [stderr]    | ^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: method is never used: `call`
Dec 06 03:53:50.750 INFO [stderr]   --> src/main.rs:95:5
Dec 06 03:53:50.750 INFO [stderr]    |
Dec 06 03:53:50.750 INFO [stderr] 95 |     fn call(&self) {
Dec 06 03:53:50.750 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: function is never used: `largest`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:100:2
Dec 06 03:53:50.750 INFO [stderr]     |
Dec 06 03:53:50.750 INFO [stderr] 100 |  fn largest<T : PartialOrd>(list: &[T]) -> &T {
Dec 06 03:53:50.750 INFO [stderr]     |  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: struct is never constructed: `Point`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:112:1
Dec 06 03:53:50.750 INFO [stderr]     |
Dec 06 03:53:50.750 INFO [stderr] 112 | struct Point<T> {
Dec 06 03:53:50.750 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: function is never used: `simulated_expensive_calculation`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:204:1
Dec 06 03:53:50.750 INFO [stderr]     |
Dec 06 03:53:50.750 INFO [stderr] 204 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
Dec 06 03:53:50.750 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: function is never used: `closure_capturing_context`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:210:1
Dec 06 03:53:50.750 INFO [stderr]     |
Dec 06 03:53:50.750 INFO [stderr] 210 | fn closure_capturing_context() {
Dec 06 03:53:50.750 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: function is never used: `iterators`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:217:1
Dec 06 03:53:50.750 INFO [stderr]     |
Dec 06 03:53:50.750 INFO [stderr] 217 | fn iterators() {
Dec 06 03:53:50.750 INFO [stderr]     | ^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: function is never used: `iterator_map`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:226:1
Dec 06 03:53:50.750 INFO [stderr]     |
Dec 06 03:53:50.750 INFO [stderr] 226 | fn iterator_map() {
Dec 06 03:53:50.750 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.750 INFO [stderr] 
Dec 06 03:53:50.750 INFO [stderr] warning: function is never used: `iterator_sum`
Dec 06 03:53:50.750 INFO [stderr]    --> src/main.rs:232:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 232 | fn iterator_sum() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `news_aggregate`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:269:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 269 | fn news_aggregate() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `vector`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:305:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 305 | fn vector() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: struct is never constructed: `Counter`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:325:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 325 | struct Counter {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: method is never used: `new`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:330:5
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 330 |     fn new() -> Counter {
Dec 06 03:53:50.751 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `if_let`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:351:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 351 | fn if_let() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `value_in_cents`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:359:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 359 | fn value_in_cents(coin : Coin) -> u32 {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `option`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:371:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 371 | fn option() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `messages`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:378:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 378 | fn messages() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `rectangles`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:383:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 383 | fn rectangles() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `build_user`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:395:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 395 | fn build_user(email: String, username: String) -> User {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `coins`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:404:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 404 | fn coins() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `slices`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:409:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 409 | fn slices() {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `takes_ownership`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:419:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 419 | fn takes_ownership(some_string: String) {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.751 INFO [stderr] warning: function is never used: `makes_copy`
Dec 06 03:53:50.751 INFO [stderr]    --> src/main.rs:423:1
Dec 06 03:53:50.751 INFO [stderr]     |
Dec 06 03:53:50.751 INFO [stderr] 423 | fn makes_copy(some_integer: i32) {
Dec 06 03:53:50.751 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.751 INFO [stderr] 
Dec 06 03:53:50.752 INFO [stderr] warning: function is never used: `first_word`
Dec 06 03:53:50.752 INFO [stderr]    --> src/main.rs:427:1
Dec 06 03:53:50.752 INFO [stderr]     |
Dec 06 03:53:50.752 INFO [stderr] 427 | fn first_word(s: &String) -> usize {
Dec 06 03:53:50.752 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.752 INFO [stderr] 
Dec 06 03:53:50.752 INFO [stderr] warning: function is never used: `guess_number`
Dec 06 03:53:50.752 INFO [stderr]    --> src/main.rs:440:1
Dec 06 03:53:50.752 INFO [stderr]     |
Dec 06 03:53:50.752 INFO [stderr] 440 | fn guess_number() {
Dec 06 03:53:50.752 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.752 INFO [stderr] 
Dec 06 03:53:50.754 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 03:53:50.754 INFO [stderr]    --> src/main.rs:245:5
Dec 06 03:53:50.754 INFO [stderr]     |
Dec 06 03:53:50.754 INFO [stderr] 245 |     read_username_from_file();
Dec 06 03:53:50.754 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 03:53:50.756 INFO [stderr]     |
Dec 06 03:53:50.756 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 06 03:53:50.756 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 03:53:50.756 INFO [stderr] 
Dec 06 03:53:51.312 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
Dec 06 03:53:51.312 INFO [stderr] su: No module specific data is present
Dec 06 03:53:52.109 INFO running `"docker" "inspect" "4132b25e5cc122056cd44b034d9049ef39143c72f6b138b564fb50812feb8574"`
Dec 06 03:53:52.231 INFO running `"docker" "rm" "-f" "4132b25e5cc122056cd44b034d9049ef39143c72f6b138b564fb50812feb8574"`
Dec 06 03:53:52.376 INFO [stdout] 4132b25e5cc122056cd44b034d9049ef39143c72f6b138b564fb50812feb8574
Dec 06 03:53:52.378 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 03:53:52.519 INFO [stdout] da90c1076d86b12c04ff621aa8141f82c9109d58556d931f612470924daca14a
Dec 06 03:53:52.521 INFO running `"docker" "start" "-a" "da90c1076d86b12c04ff621aa8141f82c9109d58556d931f612470924daca14a"`
Dec 06 03:53:52.921 INFO [stderr] usermod: no changes
Dec 06 03:53:52.954 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 06 03:53:52.955 INFO [stderr]      Running /target/debug/deps/rust_exploration-eb185530dca7fcdc
Dec 06 03:53:52.957 INFO [stdout] 
Dec 06 03:53:52.957 INFO [stdout] running 1 test
Dec 06 03:53:52.957 INFO [stdout] test filters_by_size ... ok
Dec 06 03:53:52.957 INFO [stdout] 
Dec 06 03:53:52.957 INFO [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 03:53:52.957 INFO [stdout] 
Dec 06 03:53:52.961 INFO [stderr] su: No module specific data is present
Dec 06 03:53:53.201 INFO running `"docker" "inspect" "da90c1076d86b12c04ff621aa8141f82c9109d58556d931f612470924daca14a"`
Dec 06 03:53:53.260 INFO running `"docker" "rm" "-f" "da90c1076d86b12c04ff621aa8141f82c9109d58556d931f612470924daca14a"`
Dec 06 03:53:53.326 INFO [stdout] da90c1076d86b12c04ff621aa8141f82c9109d58556d931f612470924daca14a