[INFO] cloning repository https://github.com/laruh/learn_rust_by_building_app
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laruh/learn_rust_by_building_app" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaruh%2Flearn_rust_by_building_app", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaruh%2Flearn_rust_by_building_app'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] acdba89a141282355454547ce97e16b0b529a7f2
[INFO] checking laruh/learn_rust_by_building_app against master#18a6d911caba59605eb03db1452848a85d2e5879 for pr-112743
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaruh%2Flearn_rust_by_building_app" "/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/laruh/learn_rust_by_building_app on toolchain 18a6d911caba59605eb03db1452848a85d2e5879
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/laruh/learn_rust_by_building_app
[INFO] finished tweaking git repo https://github.com/laruh/learn_rust_by_building_app
[INFO] tweaked toml for git repo https://github.com/laruh/learn_rust_by_building_app written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/laruh/learn_rust_by_building_app 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" "+18a6d911caba59605eb03db1452848a85d2e5879" "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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 390fe68fc04d246912ef5ada1bd2dcafea6e4afb8375e3abfc7f122538543ae3
[INFO] running `Command { std: "docker" "start" "-a" "390fe68fc04d246912ef5ada1bd2dcafea6e4afb8375e3abfc7f122538543ae3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "390fe68fc04d246912ef5ada1bd2dcafea6e4afb8375e3abfc7f122538543ae3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "390fe68fc04d246912ef5ada1bd2dcafea6e4afb8375e3abfc7f122538543ae3", kill_on_drop: false }`
[INFO] [stdout] 390fe68fc04d246912ef5ada1bd2dcafea6e4afb8375e3abfc7f122538543ae3
[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8710c1bcde40644a9c957395eaaa82fd3683ce09933121989ec4c83597cb6302
[INFO] running `Command { std: "docker" "start" "-a" "8710c1bcde40644a9c957395eaaa82fd3683ce09933121989ec4c83597cb6302", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.94
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]     Checking once_cell v1.17.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling tokio v1.25.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling openssl v0.10.45
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]     Checking try-lock v0.2.4
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.147
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]     Checking mio v0.8.5
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]    Compiling openssl-sys v0.9.80
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking bigdecimal v0.3.0
[INFO] [stderr]    Compiling tokio-macros v1.8.2
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking tokio-util v0.7.4
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.3.15
[INFO] [stderr]     Checking hyper v0.14.23
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking learn_rust_by_building_app v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/tuples.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let (x, y) = coord();
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clamp` is never used
[INFO] [stdout]   --> src/bin/testing.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn clamp(n: i32, lower: i32, upper: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `div` is never used
[INFO] [stdout]   --> src/bin/testing.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn div(a: i32, b: i32) -> Option<i32> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `concat` is never used
[INFO] [stdout]   --> src/bin/testing.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn concat(first: &str, second: &str) -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SuperPower` is never constructed
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum TreasureItem {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] 26 |     Gold,
[INFO] [stdout] 27 |     SuperPower,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreasureItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct TreasureChest {
[INFO] [stdout]    |        ------------- field in this struct
[INFO] [stdout] 32 |     content: TreasureItem,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreasureChest` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Gray` and `Red` are never constructed
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | enum BrickStyle {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 41 |     Dungeon,
[INFO] [stdout] 42 |     Gray,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 43 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BrickStyle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Dirt`, `Grass`, and `Wood` are never constructed
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum Tile {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 48 |     Brick(BrickStyle),
[INFO] [stdout] 49 |     Dirt,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 50 |     Grass,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     Wood,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tile` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `part_1` is never used
[INFO] [stdout]   --> src/bin/option_combinators.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn part_1() -> bool {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `part_2` is never used
[INFO] [stdout]   --> src/bin/option_combinators.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn part_2() -> Option<Access> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `part_3` is never used
[INFO] [stdout]   --> src/bin/option_combinators.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn part_3() -> Access {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Admin`, `User`, and `Guest` are never constructed
[INFO] [stdout]   --> src/bin/option_combinators.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum Access {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 36 |     Admin,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 37 |     User,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 38 |     Guest,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Access` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `maybe_access` is never used
[INFO] [stdout]   --> src/bin/option_combinators.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn maybe_access(name: &str) -> Option<Access> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `root` is never used
[INFO] [stdout]   --> src/bin/option_combinators.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn root() -> Option<Access> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unavailable` is never constructed
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Status {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 35 |     Available,
[INFO] [stdout] 36 |     Unavailable,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `vehicle` and `vin` are never read
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Rental {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 43 |     status: Status,
[INFO] [stdout] 44 |     vehicle: Vehicle,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 45 |     vin: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rental` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Sparkling` and `Fruity` are never constructed
[INFO] [stdout]   --> src/bin/structs.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | enum Flavors {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 8  |     Sweet,
[INFO] [stdout] 9  |     Sparkling,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 10 |     Fruity,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Sparkling` and `Fruity` are never constructed
[INFO] [stdout]   --> src/bin/structs.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | enum Flavors {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 8  |     Sweet,
[INFO] [stdout] 9  |     Sparkling,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 10 |     Fruity,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `state` is never read
[INFO] [stdout]   --> src/bin/typestates.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Luggage<State> {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 23 |     id: LuggageId,
[INFO] [stdout] 24 |     state: State,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `strrrr`
[INFO] [stdout]  --> src/bin/zst.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let strrrr = "this is String".to_string();
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_strrrr`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `zero_tup`
[INFO] [stdout]  --> src/bin/zst.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let zero_tup = ();
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_zero_tup`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/bin/zst.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let arr = [0u8; 0];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr_zst`
[INFO] [stdout]   --> src/bin/zst.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let arr_zst = [(), ()];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arr_zst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tuple_zst`
[INFO] [stdout]   --> src/bin/zst.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let tuple_zst = ((), ());
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tuple_zst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]  --> src/bin/zst.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Cat {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]  --> src/bin/zst.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Dog();
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Snake` is never constructed
[INFO] [stdout]  --> src/bin/zst.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Snake;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/bin/new_type_pattern.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 15 |     Black,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 16 |     Blue,
[INFO] [stdout] 17 |     Brown,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     Custom(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 19 |     Gray,
[INFO] [stdout] 20 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     Purple,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 22 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 23 |     White,
[INFO] [stdout] 24 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Yellow` are never constructed
[INFO] [stdout]   --> src/bin/imp.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 9  |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Green,
[INFO] [stdout] 11 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Yellow` are never constructed
[INFO] [stdout]   --> src/bin/imp.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 9  |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Green,
[INFO] [stdout] 11 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `state` is never read
[INFO] [stdout]   --> src/bin/typestates.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Luggage<State> {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 23 |     id: LuggageId,
[INFO] [stdout] 24 |     state: State,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Car` and `Truck` are never constructed
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum Vehicle {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 29 |     Car,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 30 |     Truck,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Vehicle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Available`, `Unavailable`, `Rented`, and `Maintenance` are never constructed
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Status {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 35 |     Available,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 36 |     Unavailable,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 37 |     Rented,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 38 |     Maintenance,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Status` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `status`, `vehicle`, and `vin` are never read
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Rental {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 43 |     status: Status,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 44 |     vehicle: Vehicle,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 45 |     vin: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rental` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Corporate` is never constructed
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Corporate(Rc<RefCell<Vec<Rental>>>);
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StoreFront` is never constructed
[INFO] [stdout]   --> src/bin/smart_pointers_refcell.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct StoreFront(Rc<RefCell<Vec<Rental>>>);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/tuples.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let (x, y) = coord();
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/bin/new_type_pattern.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 15 |     Black,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 16 |     Blue,
[INFO] [stdout] 17 |     Brown,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     Custom(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 19 |     Gray,
[INFO] [stdout] 20 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     Purple,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 22 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 23 |     White,
[INFO] [stdout] 24 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `body` and `color` are never read
[INFO] [stdout]   --> src/bin/generics_structures.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Vehicle<B: Body, C: Color> {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 23 |     body: B,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 24 |     color: C,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Vehicle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SuperPower` is never constructed
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum TreasureItem {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] 26 |     Gold,
[INFO] [stdout] 27 |     SuperPower,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreasureItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct TreasureChest {
[INFO] [stdout]    |        ------------- field in this struct
[INFO] [stdout] 32 |     content: TreasureItem,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreasureChest` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Gray` and `Red` are never constructed
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | enum BrickStyle {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 41 |     Dungeon,
[INFO] [stdout] 42 |     Gray,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 43 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BrickStyle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Dirt`, `Grass`, and `Wood` are never constructed
[INFO] [stdout]   --> src/bin/match_guards_binding.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum Tile {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 48 |     Brick(BrickStyle),
[INFO] [stdout] 49 |     Dirt,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 50 |     Grass,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     Wood,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tile` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/bin/map.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 12 |     id: i32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `MaintenanceCrews`, `MarketingDepartment`, `LineSupervisor`, `Kitchen`, and `AssemblyTechnic` are never constructed
[INFO] [stdout]   --> src/bin/question_mark_operator.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum Position {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 19 |     MaintenanceCrews,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 20 |     MarketingDepartment,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 21 |     Manager,
[INFO] [stdout] 22 |     LineSupervisor,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 23 |     Kitchen,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     AssemblyTechnic,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `body` and `color` are never read
[INFO] [stdout]   --> src/bin/generics_structures.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Vehicle<B: Body, C: Color> {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 23 |     body: B,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 24 |     color: C,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Vehicle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `name` are never read
[INFO] [stdout]   --> src/bin/map.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 12 |     id: i32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `strrrr`
[INFO] [stdout]  --> src/bin/zst.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let strrrr = "this is String".to_string();
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_strrrr`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `zero_tup`
[INFO] [stdout]  --> src/bin/zst.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let zero_tup = ();
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_zero_tup`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/bin/zst.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let arr = [0u8; 0];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr_zst`
[INFO] [stdout]   --> src/bin/zst.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let arr_zst = [(), ()];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arr_zst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tuple_zst`
[INFO] [stdout]   --> src/bin/zst.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let tuple_zst = ((), ());
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tuple_zst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]  --> src/bin/zst.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Cat {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]  --> src/bin/zst.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Dog();
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Snake` is never constructed
[INFO] [stdout]  --> src/bin/zst.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Snake;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `MaintenanceCrews`, `MarketingDepartment`, `LineSupervisor`, `Kitchen`, and `AssemblyTechnic` are never constructed
[INFO] [stdout]   --> src/bin/question_mark_operator.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum Position {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 19 |     MaintenanceCrews,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 20 |     MarketingDepartment,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 21 |     Manager,
[INFO] [stdout] 22 |     LineSupervisor,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 23 |     Kitchen,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     AssemblyTechnic,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.35s
[INFO] running `Command { std: "docker" "inspect" "8710c1bcde40644a9c957395eaaa82fd3683ce09933121989ec4c83597cb6302", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8710c1bcde40644a9c957395eaaa82fd3683ce09933121989ec4c83597cb6302", kill_on_drop: false }`
[INFO] [stdout] 8710c1bcde40644a9c957395eaaa82fd3683ce09933121989ec4c83597cb6302