[INFO] cloning repository https://github.com/JustUzair/rust-101-to-expert
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JustUzair/rust-101-to-expert" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJustUzair%2Frust-101-to-expert", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJustUzair%2Frust-101-to-expert'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b58fe53e36183771749a7021c9eca6bce9c995c
[INFO] checking JustUzair/rust-101-to-expert against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJustUzair%2Frust-101-to-expert" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JustUzair/rust-101-to-expert
[INFO] finished tweaking git repo https://github.com/JustUzair/rust-101-to-expert
[INFO] tweaked toml for git repo https://github.com/JustUzair/rust-101-to-expert written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JustUzair/rust-101-to-expert on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JustUzair/rust-101-to-expert 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dae6e181ebeed7818f77247fe240b2e8837106cb535462ec98679f520a0363c
[INFO] running `Command { std: "docker" "start" "-a" "3dae6e181ebeed7818f77247fe240b2e8837106cb535462ec98679f520a0363c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dae6e181ebeed7818f77247fe240b2e8837106cb535462ec98679f520a0363c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dae6e181ebeed7818f77247fe240b2e8837106cb535462ec98679f520a0363c", kill_on_drop: false }`
[INFO] [stdout] 3dae6e181ebeed7818f77247fe240b2e8837106cb535462ec98679f520a0363c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 402109f7ba7c7604196c6f027eb852a5b1d85fa2ed86f864ffc25343d21ba801
[INFO] running `Command { std: "docker" "start" "-a" "402109f7ba7c7604196c6f027eb852a5b1d85fa2ed86f864ffc25343d21ba801", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking Rust-Learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `traits::Animal`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use traits::Animal;
[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: `traits::Animal`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use traits::Animal;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `option_1` is never read
[INFO] [stdout]  --> src/options.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut option_1 :Option<u8> = None;
[INFO] [stdout]   |                                    ^^^^ this value is reassigned later and never used
[INFO] [stdout] 3 |     option_1 = Some(5);
[INFO] [stdout]   |     ------------------ `option_1` is overwritten here before the previous value is read
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `option_1` is never read
[INFO] [stdout]  --> src/options.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut option_1 :Option<String> = None;
[INFO] [stdout]   |                                        ^^^^ this value is reassigned later and never used
[INFO] [stdout] 9 |     option_1 = Some("Option Enum with Type String".to_string());
[INFO] [stdout]   |     -------- `option_1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `option_1` is never read
[INFO] [stdout]   --> src/options.rs:21:45
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut option_1 :CustomCharacterEnum = CustomCharacterEnum::None;
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 22 |     option_1 = CustomCharacterEnum::Archer;
[INFO] [stdout]    |     -------------------------------------- `option_1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Vehicle` is never constructed
[INFO] [stdout]   --> src/custom_struct.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Vehicle {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red`, `Blue`, `Green`, `Black`, and `White` are never constructed
[INFO] [stdout]   --> src/custom_struct.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum VehicleColor {
[INFO] [stdout]    |      ------------ variants in this enum
[INFO] [stdout]  9 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 12 |     Black,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 13 |     White,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `VehicleColor` 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: fields `color`, `model`, and `company` are never read
[INFO] [stdout]   --> src/custom_struct.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Vehicle {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 18 |     color: VehicleColor,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 19 |     model: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     company: String,
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TupleUser` is never constructed
[INFO] [stdout]   --> src/custom_struct.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct TupleUser(String, u8, String);
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/threads.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     handle.join();
[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] 24 |     let _ = handle.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/threads.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     handle2.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let _ = handle2.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Rust-Learning` (bin "Rust-Learning" test) due to 1 previous error; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: value assigned to `option_1` is never read
[INFO] [stdout]  --> src/options.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut option_1 :Option<u8> = None;
[INFO] [stdout]   |                                    ^^^^ this value is reassigned later and never used
[INFO] [stdout] 3 |     option_1 = Some(5);
[INFO] [stdout]   |     ------------------ `option_1` is overwritten here before the previous value is read
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `option_1` is never read
[INFO] [stdout]  --> src/options.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut option_1 :Option<String> = None;
[INFO] [stdout]   |                                        ^^^^ this value is reassigned later and never used
[INFO] [stdout] 9 |     option_1 = Some("Option Enum with Type String".to_string());
[INFO] [stdout]   |     -------- `option_1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `option_1` is never read
[INFO] [stdout]   --> src/options.rs:21:45
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut option_1 :CustomCharacterEnum = CustomCharacterEnum::None;
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 22 |     option_1 = CustomCharacterEnum::Archer;
[INFO] [stdout]    |     -------------------------------------- `option_1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Vehicle` is never constructed
[INFO] [stdout]   --> src/custom_struct.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Vehicle {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red`, `Blue`, `Green`, `Black`, and `White` are never constructed
[INFO] [stdout]   --> src/custom_struct.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum VehicleColor {
[INFO] [stdout]    |      ------------ variants in this enum
[INFO] [stdout]  9 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 12 |     Black,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 13 |     White,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `VehicleColor` 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: fields `color`, `model`, and `company` are never read
[INFO] [stdout]   --> src/custom_struct.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Vehicle {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 18 |     color: VehicleColor,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 19 |     model: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     company: String,
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TupleUser` is never constructed
[INFO] [stdout]   --> src/custom_struct.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct TupleUser(String, u8, String);
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/threads.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     handle.join();
[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] 24 |     let _ = handle.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/threads.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     handle2.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let _ = handle2.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Rust-Learning` (bin "Rust-Learning") due to 1 previous error; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "402109f7ba7c7604196c6f027eb852a5b1d85fa2ed86f864ffc25343d21ba801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "402109f7ba7c7604196c6f027eb852a5b1d85fa2ed86f864ffc25343d21ba801", kill_on_drop: false }`
[INFO] [stdout] 402109f7ba7c7604196c6f027eb852a5b1d85fa2ed86f864ffc25343d21ba801