[INFO] cloning repository https://github.com/martyall/rust-sandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/martyall/rust-sandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartyall%2Frust-sandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartyall%2Frust-sandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d273c94595db15fa00f1e1070336d233ca32691e
[INFO] checking martyall/rust-sandbox against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartyall%2Frust-sandbox" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/martyall/rust-sandbox on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/martyall/rust-sandbox
[INFO] finished tweaking git repo https://github.com/martyall/rust-sandbox
[INFO] tweaked toml for git repo https://github.com/martyall/rust-sandbox written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/martyall/rust-sandbox 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48bc41edcab46c35eb88999b7e1cd55e618275efb992efb8ca0470e77dc2e80c
[INFO] running `Command { std: "docker" "start" "-a" "48bc41edcab46c35eb88999b7e1cd55e618275efb992efb8ca0470e77dc2e80c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48bc41edcab46c35eb88999b7e1cd55e618275efb992efb8ca0470e77dc2e80c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48bc41edcab46c35eb88999b7e1cd55e618275efb992efb8ca0470e77dc2e80c", kill_on_drop: false }`
[INFO] [stdout] 48bc41edcab46c35eb88999b7e1cd55e618275efb992efb8ca0470e77dc2e80c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc6ee751baa351b1cf8eebfa7dd4e0c123ef1233a53e52fee795b2f9d71433b2
[INFO] running `Command { std: "docker" "start" "-a" "fc6ee751baa351b1cf8eebfa7dd4e0c123ef1233a53e52fee795b2f9d71433b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.9.0
[INFO] [stderr]     Checking rustcamp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::BTreeMap`
[INFO] [stdout]  --> src/week3/macros.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::BTreeMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `btree`
[INFO] [stdout]  --> src/week3/macros.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | macro_rules! btree {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude`
[INFO] [stdout]  --> src/week3/threadz.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/week2/vending.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let coins: Vec<Coin> = vault.keys().cloned().collect();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude`
[INFO] [stdout]  --> src/week3/threadz.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidates`
[INFO] [stdout]   --> src/week2/vending.rs:31:48
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidates`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SayHi` is never used
[INFO] [stdout]  --> src/week1/box_pin.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | trait SayHi: fmt::Debug {
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MutMeSomehow` is never used
[INFO] [stdout]   --> src/week1/box_pin.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | trait MutMeSomehow {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Command` is never used
[INFO] [stdout]  --> src/week1/sized.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Command {}
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CommandHandler` is never used
[INFO] [stdout]  --> src/week1/sized.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait CommandHandler<C: Command> {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CreateUser` is never constructed
[INFO] [stdout]   --> src/week1/sized.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct CreateUser {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Post<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SNew` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct SNew;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SUnModerated` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct SUnModerated;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/week2/vending.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let coins: Vec<Coin> = vault.keys().cloned().collect();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidates`
[INFO] [stdout]   --> src/week2/vending.rs:31:48
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidates`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SPublished` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct SPublished;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SDeleted` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct SDeleted;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `publish` is never used
[INFO] [stdout]   --> src/week2/type_safety.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Post<SNew> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 33 |     pub fn publish(self) -> Post<SUnModerated> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Product` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Product {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Coin` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Coin(i32);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/week2/vending.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Coin {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(value: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VendingMachine` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct VendingMachine {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Change` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Change {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_change` is never used
[INFO] [stdout]   --> src/week2/vending.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NOW` is never used
[INFO] [stdout]  --> src/week3/time.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const NOW: &str = "2019-06-26";
[INFO] [stdout]   |       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/week3/time.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `with_birthdate`, `age`, and `is_adult` are never used
[INFO] [stdout]   --> src/week3/time.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn age(&self) -> u16 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn is_adult(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SayHi` is never used
[INFO] [stdout]  --> src/week1/box_pin.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | trait SayHi: fmt::Debug {
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MutMeSomehow` is never used
[INFO] [stdout]   --> src/week1/box_pin.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | trait MutMeSomehow {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Command` is never used
[INFO] [stdout]  --> src/week1/sized.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Command {}
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CommandHandler` is never used
[INFO] [stdout]  --> src/week1/sized.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait CommandHandler<C: Command> {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CreateUser` is never constructed
[INFO] [stdout]   --> src/week1/sized.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct CreateUser {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Post<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SNew` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct SNew;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SUnModerated` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct SUnModerated;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SPublished` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct SPublished;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SDeleted` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct SDeleted;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `publish` is never used
[INFO] [stdout]   --> src/week2/type_safety.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Post<SNew> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 33 |     pub fn publish(self) -> Post<SUnModerated> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Product` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Product {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Coin` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Coin(i32);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/week2/vending.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Coin {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(value: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VendingMachine` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct VendingMachine {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Change` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Change {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_change` is never used
[INFO] [stdout]   --> src/week2/vending.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_adult` is never used
[INFO] [stdout]   --> src/week3/time.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn is_adult(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.05s
[INFO] running `Command { std: "docker" "inspect" "fc6ee751baa351b1cf8eebfa7dd4e0c123ef1233a53e52fee795b2f9d71433b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc6ee751baa351b1cf8eebfa7dd4e0c123ef1233a53e52fee795b2f9d71433b2", kill_on_drop: false }`
[INFO] [stdout] fc6ee751baa351b1cf8eebfa7dd4e0c123ef1233a53e52fee795b2f9d71433b2
[INFO] checking martyall/rust-sandbox against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartyall%2Frust-sandbox" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/martyall/rust-sandbox on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/martyall/rust-sandbox
[INFO] finished tweaking git repo https://github.com/martyall/rust-sandbox
[INFO] tweaked toml for git repo https://github.com/martyall/rust-sandbox written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/martyall/rust-sandbox 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0354cb89a122b0997191f686b221c6152a5a162b34738771a4477caa30d0813
[INFO] running `Command { std: "docker" "start" "-a" "d0354cb89a122b0997191f686b221c6152a5a162b34738771a4477caa30d0813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0354cb89a122b0997191f686b221c6152a5a162b34738771a4477caa30d0813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0354cb89a122b0997191f686b221c6152a5a162b34738771a4477caa30d0813", kill_on_drop: false }`
[INFO] [stdout] d0354cb89a122b0997191f686b221c6152a5a162b34738771a4477caa30d0813
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d28b1db125b0a12e994b3ffba050d3e8b981d434316b3cd690eec3cbd2a9735
[INFO] running `Command { std: "docker" "start" "-a" "5d28b1db125b0a12e994b3ffba050d3e8b981d434316b3cd690eec3cbd2a9735", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking rayon v1.9.0
[INFO] [stderr]     Checking rustcamp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::BTreeMap`
[INFO] [stdout]  --> src/week3/macros.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::BTreeMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `btree`
[INFO] [stdout]  --> src/week3/macros.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | macro_rules! btree {
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude`
[INFO] [stdout]  --> src/week3/threadz.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/week2/vending.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let coins: Vec<Coin> = vault.keys().cloned().collect();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidates`
[INFO] [stdout]   --> src/week2/vending.rs:31:48
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidates`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SayHi` is never used
[INFO] [stdout]  --> src/week1/box_pin.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | trait SayHi: fmt::Debug {
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MutMeSomehow` is never used
[INFO] [stdout]   --> src/week1/box_pin.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | trait MutMeSomehow {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Command` is never used
[INFO] [stdout]  --> src/week1/sized.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Command {}
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CommandHandler` is never used
[INFO] [stdout]  --> src/week1/sized.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait CommandHandler<C: Command> {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CreateUser` is never constructed
[INFO] [stdout]   --> src/week1/sized.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct CreateUser {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Post<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SNew` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct SNew;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SUnModerated` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct SUnModerated;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SPublished` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct SPublished;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SDeleted` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct SDeleted;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `publish` is never used
[INFO] [stdout]   --> src/week2/type_safety.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Post<SNew> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 33 |     pub fn publish(self) -> Post<SUnModerated> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Product` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Product {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Coin` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Coin(i32);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/week2/vending.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Coin {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(value: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VendingMachine` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct VendingMachine {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Change` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Change {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_change` is never used
[INFO] [stdout]   --> src/week2/vending.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NOW` is never used
[INFO] [stdout]  --> src/week3/time.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const NOW: &str = "2019-06-26";
[INFO] [stdout]   |       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/week3/time.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `with_birthdate`, `age`, and `is_adult` are never used
[INFO] [stdout]   --> src/week3/time.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn age(&self) -> u16 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn is_adult(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude`
[INFO] [stdout]  --> src/week3/threadz.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/week2/vending.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let coins: Vec<Coin> = vault.keys().cloned().collect();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidates`
[INFO] [stdout]   --> src/week2/vending.rs:31:48
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |                                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidates`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SayHi` is never used
[INFO] [stdout]  --> src/week1/box_pin.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | trait SayHi: fmt::Debug {
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MutMeSomehow` is never used
[INFO] [stdout]   --> src/week1/box_pin.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | trait MutMeSomehow {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Command` is never used
[INFO] [stdout]  --> src/week1/sized.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Command {}
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CommandHandler` is never used
[INFO] [stdout]  --> src/week1/sized.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait CommandHandler<C: Command> {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CreateUser` is never constructed
[INFO] [stdout]   --> src/week1/sized.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct CreateUser {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Post<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SNew` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct SNew;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SUnModerated` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct SUnModerated;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SPublished` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct SPublished;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SDeleted` is never constructed
[INFO] [stdout]   --> src/week2/type_safety.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct SDeleted;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `publish` is never used
[INFO] [stdout]   --> src/week2/type_safety.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Post<SNew> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 33 |     pub fn publish(self) -> Post<SUnModerated> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Product` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Product {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Coin` is never constructed
[INFO] [stdout]  --> src/week2/vending.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Coin(i32);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/week2/vending.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Coin {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(value: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VendingMachine` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct VendingMachine {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Change` is never constructed
[INFO] [stdout]   --> src/week2/vending.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Change {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_change` is never used
[INFO] [stdout]   --> src/week2/vending.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn make_change(vault: &mut HashMap<Coin, i32>, candidates: &mut Vec<Change>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_adult` is never used
[INFO] [stdout]   --> src/week3/time.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn is_adult(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.41s
[INFO] running `Command { std: "docker" "inspect" "5d28b1db125b0a12e994b3ffba050d3e8b981d434316b3cd690eec3cbd2a9735", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d28b1db125b0a12e994b3ffba050d3e8b981d434316b3cd690eec3cbd2a9735", kill_on_drop: false }`
[INFO] [stdout] 5d28b1db125b0a12e994b3ffba050d3e8b981d434316b3cd690eec3cbd2a9735