[INFO] cloning repository https://github.com/hzhu359/rust_proj
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hzhu359/rust_proj" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzhu359%2Frust_proj", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzhu359%2Frust_proj'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bacb0e967579d52ea282b05b6697f736295edeca
[INFO] building hzhu359/rust_proj against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzhu359%2Frust_proj" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hzhu359/rust_proj on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hzhu359/rust_proj
[INFO] finished tweaking git repo https://github.com/hzhu359/rust_proj
[INFO] tweaked toml for git repo https://github.com/hzhu359/rust_proj written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hzhu359/rust_proj 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14b8a355dec7f23433ffa9736aa75e50ea5fb7daac4d221f25b37422b93272e3
[INFO] running `Command { std: "docker" "start" "-a" "14b8a355dec7f23433ffa9736aa75e50ea5fb7daac4d221f25b37422b93272e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14b8a355dec7f23433ffa9736aa75e50ea5fb7daac4d221f25b37422b93272e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14b8a355dec7f23433ffa9736aa75e50ea5fb7daac4d221f25b37422b93272e3", kill_on_drop: false }`
[INFO] [stdout] 14b8a355dec7f23433ffa9736aa75e50ea5fb7daac4d221f25b37422b93272e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 725537e1cb5bf59a5c54b169a9a02c348597df3a1c6945ae1ab7b5888924f50d
[INFO] running `Command { std: "docker" "start" "-a" "725537e1cb5bf59a5c54b169a9a02c348597df3a1c6945ae1ab7b5888924f50d", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir/hello_world)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]    Compiling control_flow v0.1.0 (/opt/rustwide/workdir/control_flow)
[INFO] [stderr]    Compiling restaurant v0.1.0 (/opt/rustwide/workdir/restaurant)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]    Compiling structs v0.1.0 (/opt/rustwide/workdir/structs)
[INFO] [stderr]    Compiling chapter_eight_exs v0.1.0 (/opt/rustwide/workdir/chapter_eight_exs)
[INFO] [stderr]    Compiling data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]    Compiling enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stderr]    Compiling chapter_three_exs v0.1.0 (/opt/rustwide/workdir/chapter_three_exs)
[INFO] [stderr]    Compiling functions v0.1.0 (/opt/rustwide/workdir/functions)
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir/hello_cargo)
[INFO] [stdout] warning: function `add_to_waitlist` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         fn add_to_waitlist() {}
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |         fn seat_at_table() {}
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn take_order() {}
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |         fn serve_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |         fn take_payment() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> data_structures/src/main.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, hash::Hash, vec};
[INFO] [stdout]   |                                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_elem_1`
[INFO] [stdout]   --> data_structures/src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let v_elem_1 = &v_macro[3];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_elem_1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_elem_2`
[INFO] [stdout]   --> data_structures/src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let v_elem_2 = v_macro.get(3);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_elem_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `s` is assigned to, but never used
[INFO] [stdout]   --> data_structures/src/main.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut s = String::new();
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_s` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> data_structures/src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     s = "helloo".to_string();
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> data_structures/src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     s = String::from("yooooooo");
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> data_structures/src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let s = format!("{s1}{s2}");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `team_yellow_score`
[INFO] [stdout]   --> data_structures/src/main.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let team_yellow_score = scores.get(&team_yellow).copied().unwrap_or(0);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_team_yellow_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t1`
[INFO] [stdout]   --> data_structures/src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let t1 = scores.get("Yellow");
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_t1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> data_structures/src/main.rs:110:10
[INFO] [stdout]     |
[INFO] [stdout] 110 |     for (key, value) in &mut scores {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> chapter_eight_exs/src/main.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> enums/src/main.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 |     };
[INFO] [stdout]   |      ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> enums/src/main.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]  --> enums/src/main.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     enum Color {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> enums/src/main.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     enum Message {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_default_user` is never used
[INFO] [stdout]   --> structs/src/main.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn create_default_user(email: String, username: String) -> User {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> structs/src/main.rs:73:22
[INFO] [stdout]    |
[INFO] [stdout] 73 |     struct Color(u8, u8, u8);
[INFO] [stdout]    |            -----     ^^  ^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FunTrait` is never constructed
[INFO] [stdout]   --> structs/src/main.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 |     struct FunTrait;
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.2.9
[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 guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.90s
[INFO] running `Command { std: "docker" "inspect" "725537e1cb5bf59a5c54b169a9a02c348597df3a1c6945ae1ab7b5888924f50d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "725537e1cb5bf59a5c54b169a9a02c348597df3a1c6945ae1ab7b5888924f50d", kill_on_drop: false }`
[INFO] [stdout] 725537e1cb5bf59a5c54b169a9a02c348597df3a1c6945ae1ab7b5888924f50d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b16f028e1b1a5d3ddb1de74ccd2390e44129f97ffc384edb78f7506d88f504e7
[INFO] running `Command { std: "docker" "start" "-a" "b16f028e1b1a5d3ddb1de74ccd2390e44129f97ffc384edb78f7506d88f504e7", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stdout] warning: function `add_to_waitlist` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         fn add_to_waitlist() {}
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |         fn seat_at_table() {}
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn take_order() {}
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |         fn serve_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |         fn take_payment() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling structs v0.1.0 (/opt/rustwide/workdir/structs)
[INFO] [stderr]    Compiling enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]    Compiling chapter_three_exs v0.1.0 (/opt/rustwide/workdir/chapter_three_exs)
[INFO] [stderr]    Compiling control_flow v0.1.0 (/opt/rustwide/workdir/control_flow)
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir/hello_cargo)
[INFO] [stderr]    Compiling chapter_eight_exs v0.1.0 (/opt/rustwide/workdir/chapter_eight_exs)
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir/hello_world)
[INFO] [stderr]    Compiling functions v0.1.0 (/opt/rustwide/workdir/functions)
[INFO] [stderr]    Compiling restaurant v0.1.0 (/opt/rustwide/workdir/restaurant)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]    Compiling data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stdout] warning: function `add_to_waitlist` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         fn add_to_waitlist() {}
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |         fn seat_at_table() {}
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> restaurant/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         fn take_order() {}
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |         fn serve_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> restaurant/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |         fn take_payment() {}
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> data_structures/src/main.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, hash::Hash, vec};
[INFO] [stdout]   |                                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> enums/src/main.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 |     };
[INFO] [stdout]   |      ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> enums/src/main.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> chapter_eight_exs/src/main.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_elem_1`
[INFO] [stdout]   --> data_structures/src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let v_elem_1 = &v_macro[3];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_elem_1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_elem_2`
[INFO] [stdout]   --> data_structures/src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let v_elem_2 = v_macro.get(3);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_elem_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `s` is assigned to, but never used
[INFO] [stdout]   --> data_structures/src/main.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut s = String::new();
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_s` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> data_structures/src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     s = "helloo".to_string();
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> data_structures/src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     s = String::from("yooooooo");
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> data_structures/src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let s = format!("{s1}{s2}");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `team_yellow_score`
[INFO] [stdout]   --> data_structures/src/main.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let team_yellow_score = scores.get(&team_yellow).copied().unwrap_or(0);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_team_yellow_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t1`
[INFO] [stdout]   --> data_structures/src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let t1 = scores.get("Yellow");
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_t1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> data_structures/src/main.rs:110:10
[INFO] [stdout]     |
[INFO] [stdout] 110 |     for (key, value) in &mut scores {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "b16f028e1b1a5d3ddb1de74ccd2390e44129f97ffc384edb78f7506d88f504e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b16f028e1b1a5d3ddb1de74ccd2390e44129f97ffc384edb78f7506d88f504e7", kill_on_drop: false }`
[INFO] [stdout] b16f028e1b1a5d3ddb1de74ccd2390e44129f97ffc384edb78f7506d88f504e7