[INFO] cloning repository https://github.com/RoskiDeluge/playaround
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RoskiDeluge/playaround" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRoskiDeluge%2Fplayaround", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRoskiDeluge%2Fplayaround'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c19d3614f606fad3fbc37de9c2236e590d8aa9d9
[INFO] checking RoskiDeluge/playaround against try#b66808126f24f2f30898306a881e1676824ea80c for pr-133502-23
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRoskiDeluge%2Fplayaround" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/RoskiDeluge/playaround
[INFO] finished tweaking git repo https://github.com/RoskiDeluge/playaround
[INFO] tweaked toml for git repo https://github.com/RoskiDeluge/playaround written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/RoskiDeluge/playaround on toolchain b66808126f24f2f30898306a881e1676824ea80c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b66808126f24f2f30898306a881e1676824ea80c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/RoskiDeluge/playaround 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" "+b66808126f24f2f30898306a881e1676824ea80c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9
[INFO] running `Command { std: "docker" "start" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9" "/opt/rustwide/cargo-home/bin/cargo" "+b66808126f24f2f30898306a881e1676824ea80c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9" "/opt/rustwide/cargo-home/bin/cargo" "+b66808126f24f2f30898306a881e1676824ea80c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/m1_enums.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/m1_enums.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CarColor` is never used
[INFO] [stdout]  --> src/m1_enums.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum CarColor {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum GivenResult<T, E> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOption` is never used
[INFO] [stdout]   --> src/m1_enums.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum GivenOption<T> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_car_color_red` is never used
[INFO] [stdout]   --> src/m1_enums.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn create_car_color_red() -> CarColor {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn check_under_five(num_check: u8) -> GivenResult<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn check_under_five_built_in(num_check: u8) -> Result<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn remainder_zero(num_check: f32) -> GivenOption<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn remainder_zero_built_in(num_check: f32) -> Option<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/m2_structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `increment_sign_in_count` and `change_email` are never used
[INFO] [stdout]   --> src/m2_structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl User {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 10 |     fn increment_sign_in_count(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_username` is never used
[INFO] [stdout]   --> src/m2_structs.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Attacker` is never used
[INFO] [stdout]  --> src/m3_traits.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Attacker {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Character` is never used
[INFO] [stdout]  --> src/m3_traits.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Character {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EthereumAddress` is never used
[INFO] [stdout]  --> src/m4_polymorphism.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait EthereumAddress {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ethereum_data` is never used
[INFO] [stdout]   --> src/m4_polymorphism.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn get_ethereum_data<T: EthereumAddress>(address: T) -> Address {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]  --> src/m6_patterns.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Message {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]   --> src/m6_patterns.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn process_message(msg: Message) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `my_async_call` is never used
[INFO] [stdout]  --> src/m7_async.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | async fn my_async_call(url: &str) -> Result<serde_json::Value, reqwest::Error> {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_quit`
[INFO] [stdout]   --> src/m6_patterns.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let my_quit = Message::Quit;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_quit`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_color`
[INFO] [stdout]   --> src/m6_patterns.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let my_color = Message::ChangeColor(10, 20, 255);
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_move`
[INFO] [stdout]   --> src/m6_patterns.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let my_move = Message::Move { x: 10, y: 200 };
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_move`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_err`
[INFO] [stdout]   --> src/m6_patterns.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let some_err: Result<i32, &str> = Err("There was a problem");
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/m6_patterns.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |             Location { x, y: 0 } => println!("Y is on the axis"),
[INFO] [stdout]     |                        ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/m6_patterns.rs:121:30
[INFO] [stdout]     |
[INFO] [stdout] 121 |             Location { x: 0, y } => println!("X is on the axis"),
[INFO] [stdout]     |                              ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/m6_patterns.rs:122:24
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Location { x, y } => println!("X and Y are not the axis"),
[INFO] [stdout]     |                        ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/m6_patterns.rs:122:27
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Location { x, y } => println!("X and Y are not the axis"),
[INFO] [stdout]     |                           ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Green`, `Blue`, and `Silver` are never constructed
[INFO] [stdout]  --> src/m1_enums.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum CarColor {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 5 |     Red,
[INFO] [stdout] 6 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     Blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     Silver,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CarColor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum GivenResult<T, E> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOption` is never used
[INFO] [stdout]   --> src/m1_enums.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum GivenOption<T> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn check_under_five(num_check: u8) -> GivenResult<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn remainder_zero(num_check: f32) -> GivenOption<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `active` is never read
[INFO] [stdout]  --> src/m2_structs.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 6 |     active: bool,
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Warrior` and `Archer` are never constructed
[INFO] [stdout]  --> src/m3_traits.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Character {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 7 |     Warrior,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 8 |     Archer,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/m1_enums.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         dbg!(under_five_res);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let _ = dbg!(under_five_res);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 23s
[INFO] running `Command { std: "docker" "inspect" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9", kill_on_drop: false }`
[INFO] [stdout] 22a27aad763570e372687d3a4cccc1cd7dd31685d56c6777f52c3b315f81b4f9
