[INFO] cloning repository https://github.com/zgblog/rust-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zgblog/rust-study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzgblog%2Frust-study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzgblog%2Frust-study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 979810785a1ae2349cfb7e0529b386adef18ccd9
[INFO] testing zgblog/rust-study against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzgblog%2Frust-study" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zgblog/rust-study
[INFO] finished tweaking git repo https://github.com/zgblog/rust-study
[INFO] tweaked toml for git repo https://github.com/zgblog/rust-study written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zgblog/rust-study on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zgblog/rust-study already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe7176aed2d5810825f983a41a4b4b6991e7347e75654603d1382675759ce507
[INFO] running `Command { std: "docker" "start" "-a" "fe7176aed2d5810825f983a41a4b4b6991e7347e75654603d1382675759ce507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe7176aed2d5810825f983a41a4b4b6991e7347e75654603d1382675759ce507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe7176aed2d5810825f983a41a4b4b6991e7347e75654603d1382675759ce507", kill_on_drop: false }`
[INFO] [stdout] fe7176aed2d5810825f983a41a4b4b6991e7347e75654603d1382675759ce507
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b53f585eef3b6e7a0f8a3e4fe8a1414b7b611c5fb486ffda5983839ec3da6bf
[INFO] running `Command { std: "docker" "start" "-a" "5b53f585eef3b6e7a0f8a3e4fe8a1414b7b611c5fb486ffda5983839ec3da6bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `seasonal_fruit` is never read
[INFO] [stdout]  --> src/lib.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub struct Breakfast{
[INFO] [stdout]   |                --------- field in this struct
[INFO] [stdout] 3 |         pub toast: String,
[INFO] [stdout] 4 |         seasonal_fruit: String
[INFO] [stdout]   |         ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Appetizer` is never used
[INFO] [stdout]   --> src/lib.rs:16:14
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub enum Appetizer {}
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]   --> src/lib.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |         fn seat_at_table() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]   --> src/lib.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |         fn take_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> src/lib.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |         fn take_payment() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `todo` is never used
[INFO] [stdout]  --> src/back_of_house/hosting.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn todo() {}
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> src/bin/borrow.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = update(&mut s2);
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons` and `Nil`
[INFO] [stdout]   --> src/bin/smartpointer/refcell_test.rs:77:19
[INFO] [stdout]    |
[INFO] [stdout] 77 | use crate::List::{Cons, Nil};
[INFO] [stdout]    |                   ^^^^  ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `refcell`
[INFO] [stdout]   --> src/bin/smartpointer/refcell_test.rs:94:2
[INFO] [stdout]    |
[INFO] [stdout] 94 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `src/bin/smartpointer/refcell_test.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alabama` is never constructed
[INFO] [stdout]  --> src/bin/match_test.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum UsState {
[INFO] [stdout]   |      ------- variant in this enum
[INFO] [stdout] 3 |     Alabama,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]  --> src/bin/match_test.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Coin {
[INFO] [stdout]   |      ---- variants in this enum
[INFO] [stdout] 7 |     Penny,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     Nickel,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 9 |     Dime,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `study` (bin "refcell") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> src/bin/smartpointer/box_test.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let list = Cons(1,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/bin/function.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let x = 5;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/bin/smartpointer/box_test.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `box_list` is never used
[INFO] [stdout]   --> src/bin/smartpointer/box_test.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn box_list() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number2`
[INFO] [stdout]   --> src/bin/function.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let number2 = if true {5} else {6};
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_number2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/bin/enum_test.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let four = IpAddrKind::V4;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/bin/enum_test.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let six = IpAddrKind::V6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> src/bin/enum_test.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let home = IpAddr {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> src/bin/enum_test.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let loopback = IpAddr {
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip_kind`
[INFO] [stdout]   --> src/bin/enum_test.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn route(ip_kind: IpAddrKind) {
[INFO] [stdout]    |          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_kind`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind2` is never used
[INFO] [stdout]  --> src/bin/enum_test.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum IpAddrKind2 {
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/bin/enum_test.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl IpAddrKind2 {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 12 |     fn call(self) {}
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]   --> src/bin/enum_test.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct IpAddr {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 16 |     kind: IpAddrKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 17 |     address: String
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `route` is never used
[INFO] [stdout]   --> src/bin/enum_test.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn route(ip_kind: IpAddrKind) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scores`
[INFO] [stdout]   --> src/bin/collect/map_test.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let scores: HashMap<_, _> = teams.iter().zip(init_scores.iter()).collect();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_scores`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Summary_2` should have an upper camel case name
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | trait Summary_2 {
[INFO] [stdout]    |       ^^^^^^^^^ help: convert the identifier to upper camel case: `Summary2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Summary_3` should have an upper camel case name
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Summary_3 {
[INFO] [stdout]    |       ^^^^^^^^^ help: convert the identifier to upper camel case: `Summary3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `study` (bin "lifetime") due to 3 previous errors; 1 warning emitted
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/bin/smartpointer/rc_test.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let b = Cons(3, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/bin/smartpointer/rc_test.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/bin/smartpointer/rc_test.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let b = Cons(3, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `len` on type `&'a str`
[INFO] [stdout]   --> src/bin/generics/lifetime_test.rs:58:20
[INFO] [stdout]    |
[INFO] [stdout] 58 |     if x.len() > y.len {
[INFO] [stdout]    |                    ^^^ method, not a field
[INFO] [stdout]    |
[INFO] [stdout] help: use parentheses to call the method
[INFO] [stdout]    |
[INFO] [stdout] 58 |     if x.len() > y.len() {
[INFO] [stdout]    |                       ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/bin/smartpointer/rc_test.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/smartpointer/rc_test.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Cons(i32, Rc<List>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 8 -     Cons(i32, Rc<List>),
[INFO] [stdout] 8 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_test1` is never used
[INFO] [stdout]   --> src/bin/smartpointer/rc_test.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn rc_test1() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:90:11
[INFO] [stdout]    |
[INFO] [stdout] 90 |         if(self.x >= self.y) {
[INFO] [stdout]    |           ^                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 90 -         if(self.x >= self.y) {
[INFO] [stdout] 90 +         if self.x >= self.y  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/generics/lifetime_test.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn longest_with_an_announcement<'a, T> (x: &'a str, y: &'a str, ann: T) where T: Display {
[INFO] [stdout]    |                                                                        - help: try adding a return type: `-> &'a str`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         x
[INFO] [stdout]    |         ^ expected `()`, found `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/generics/lifetime_test.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn longest_with_an_announcement<'a, T> (x: &'a str, y: &'a str, ann: T) where T: Display {
[INFO] [stdout]    |                                                                        - help: try adding a return type: `-> &'a str`
[INFO] [stdout] ...
[INFO] [stdout] 61 |         y
[INFO] [stdout]    |         ^ expected `()`, found `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/bin/generics/lifetime_test.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let i = ImportantExcerpt {part: first_sentence};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0615.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p3`
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let p3 = p1.mixup(p2);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_p3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest_i32` is never used
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn largest_i32(list: &[i32]) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest_char` is never used
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn largest_char(list: &[char]) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | impl<T, U> Point<T, U> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 58 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 81 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/bin/generics/gen_test.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 89 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn notify_5<T, U>(t: T, u: U) where T: Display + Clone, U: Clone + Debug {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:90:25
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn notify_5<T, U>(t: T, u: U) where T: Display + Clone, U: Clone + Debug {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Summary_2` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | trait Summary_2 {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Summary_3` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Summary_3 {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn notify(item: impl Summary) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_2` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn notify_2<T: Summary>(item: T) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_3` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn notify_3(item: impl Summary + Display) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_4` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn notify_4<T: Summary + Display>(item: T) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_5` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn notify_5<T, U>(t: T, u: U) where T: Display + Clone, U: Clone + Debug {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_summarizable` is never used
[INFO] [stdout]   --> src/bin/generics/trait_test.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn return_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5b53f585eef3b6e7a0f8a3e4fe8a1414b7b611c5fb486ffda5983839ec3da6bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b53f585eef3b6e7a0f8a3e4fe8a1414b7b611c5fb486ffda5983839ec3da6bf", kill_on_drop: false }`
[INFO] [stdout] 5b53f585eef3b6e7a0f8a3e4fe8a1414b7b611c5fb486ffda5983839ec3da6bf