[INFO] cloning repository https://github.com/phudekar/intro-to-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/phudekar/intro-to-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphudekar%2Fintro-to-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphudekar%2Fintro-to-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e68ff2df772856781f809ec77f0c991175f51329
[INFO] testing phudekar/intro-to-rust against 1.77.0 for beta-1.78-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphudekar%2Fintro-to-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phudekar/intro-to-rust on toolchain 1.77.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.77.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/phudekar/intro-to-rust
[INFO] finished tweaking git repo https://github.com/phudekar/intro-to-rust
[INFO] tweaked toml for git repo https://github.com/phudekar/intro-to-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/phudekar/intro-to-rust 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" "+1.77.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] testing phudekar/intro-to-rust against beta-2024-03-24 for beta-1.78-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphudekar%2Fintro-to-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phudekar/intro-to-rust on toolchain beta-2024-03-24
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-03-24" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/phudekar/intro-to-rust
[INFO] finished tweaking git repo https://github.com/phudekar/intro-to-rust
[INFO] tweaked toml for git repo https://github.com/phudekar/intro-to-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/phudekar/intro-to-rust 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" "+beta-2024-03-24" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing phudekar/intro-to-rust against beta-2024-03-24 for beta-1.78-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphudekar%2Fintro-to-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phudekar/intro-to-rust on toolchain beta-2024-03-24
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-03-24" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/phudekar/intro-to-rust
[INFO] finished tweaking git repo https://github.com/phudekar/intro-to-rust
[INFO] tweaked toml for git repo https://github.com/phudekar/intro-to-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/phudekar/intro-to-rust 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" "+beta-2024-03-24" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded geoutils v0.4.0
[INFO] [stderr]   Downloaded libc v0.2.74
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-03-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7bb0e803a32380437ca20ff6e723fff6c433ac7ad6cd9b6c84579960f46981d5
[INFO] running `Command { std: "docker" "start" "-a" "7bb0e803a32380437ca20ff6e723fff6c433ac7ad6cd9b6c84579960f46981d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bb0e803a32380437ca20ff6e723fff6c433ac7ad6cd9b6c84579960f46981d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bb0e803a32380437ca20ff6e723fff6c433ac7ad6cd9b6c84579960f46981d5", kill_on_drop: false }`
[INFO] [stdout] 7bb0e803a32380437ca20ff6e723fff6c433ac7ad6cd9b6c84579960f46981d5
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-03-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ca8bef5b81937894ce44a5e07f0e3412fa6f7feca6aea159bf694224b5174d2
[INFO] running `Command { std: "docker" "start" "-a" "3ca8bef5b81937894ce44a5e07f0e3412fa6f7feca6aea159bf694224b5174d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling geoutils v0.4.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling intro-to-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/unique_words.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]  --> src/ownership.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut age = 7;
[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: unused variable: `a`
[INFO] [stdout]  --> src/pattern_matching.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let a = 5;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `from` and `to` are never read
[INFO] [stdout]   --> src/generics.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct UPI {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 28 |     from: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     to: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `number` and `expiry` are never read
[INFO] [stdout]   --> src/generics.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct CreditCard {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 48 |     number: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 49 |     expiry: (u8, u8),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `author` is never read
[INFO] [stdout]   --> src/library.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct Book {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 47 |     pub title: String,
[INFO] [stdout] 48 |     author: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Book` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `length_with_borrow` is never used
[INFO] [stdout]   --> src/ownership.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn length_with_borrow(str: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Circle`, `Square`, and `Triangle` are never constructed
[INFO] [stdout]   --> src/pattern_matching.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub enum Shape {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 35 |     Circle(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 36 |     Square(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Rectangle(f64, f64),
[INFO] [stdout] 38 |     Triangle(f64, f64, f64),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `route` is never read
[INFO] [stdout]   --> src/transport.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Bus {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 24 |     route: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Blue` and `Gree` are never constructed
[INFO] [stdout]   --> src/transport.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub enum MetroLine {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 35 |     Red,
[INFO] [stdout] 36 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 37 |     Gree,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MetroLine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/unique_words.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Worker {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 55 |     pub id: usize,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.53s
[INFO] running `Command { std: "docker" "inspect" "3ca8bef5b81937894ce44a5e07f0e3412fa6f7feca6aea159bf694224b5174d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ca8bef5b81937894ce44a5e07f0e3412fa6f7feca6aea159bf694224b5174d2", kill_on_drop: false }`
[INFO] [stdout] 3ca8bef5b81937894ce44a5e07f0e3412fa6f7feca6aea159bf694224b5174d2
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-03-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c1c13b823fcb640beeb2d1bd4666a3437f67fd4515ec15e2b284440e7be1903
[INFO] running `Command { std: "docker" "start" "-a" "0c1c13b823fcb640beeb2d1bd4666a3437f67fd4515ec15e2b284440e7be1903", kill_on_drop: false }`
[INFO] [stderr]    Compiling intro-to-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/unique_words.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]  --> src/ownership.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut age = 7;
[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: unused variable: `a`
[INFO] [stdout]  --> src/pattern_matching.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let a = 5;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `from` and `to` are never read
[INFO] [stdout]   --> src/generics.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct UPI {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 28 |     from: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     to: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `number` and `expiry` are never read
[INFO] [stdout]   --> src/generics.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct CreditCard {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 48 |     number: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 49 |     expiry: (u8, u8),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `author` is never read
[INFO] [stdout]   --> src/library.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct Book {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 47 |     pub title: String,
[INFO] [stdout] 48 |     author: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Book` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `length_with_borrow` is never used
[INFO] [stdout]   --> src/ownership.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn length_with_borrow(str: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `route` is never read
[INFO] [stdout]   --> src/transport.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Bus {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 24 |     route: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Blue` and `Gree` are never constructed
[INFO] [stdout]   --> src/transport.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub enum MetroLine {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 35 |     Red,
[INFO] [stdout] 36 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 37 |     Gree,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MetroLine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/unique_words.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Worker {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 55 |     pub id: usize,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "0c1c13b823fcb640beeb2d1bd4666a3437f67fd4515ec15e2b284440e7be1903", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c1c13b823fcb640beeb2d1bd4666a3437f67fd4515ec15e2b284440e7be1903", kill_on_drop: false }`
[INFO] [stdout] 0c1c13b823fcb640beeb2d1bd4666a3437f67fd4515ec15e2b284440e7be1903
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-03-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5e6d0f73d185967d6b697f7af7fe58771fb3508058c16a53bf0aea3f695a37a6
[INFO] running `Command { std: "docker" "start" "-a" "5e6d0f73d185967d6b697f7af7fe58771fb3508058c16a53bf0aea3f695a37a6", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/unique_words.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `age` is never read
[INFO] [stderr]  --> src/ownership.rs:2:13
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let mut age = 7;
[INFO] [stderr]   |             ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/pattern_matching.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let a = 5;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `from` and `to` are never read
[INFO] [stderr]   --> src/generics.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | struct UPI {
[INFO] [stderr]    |        --- fields in this struct
[INFO] [stderr] 28 |     from: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 29 |     to: String,
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `number` and `expiry` are never read
[INFO] [stderr]   --> src/generics.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 47 | struct CreditCard {
[INFO] [stderr]    |        ---------- fields in this struct
[INFO] [stderr] 48 |     number: u64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 49 |     expiry: (u8, u8),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `author` is never read
[INFO] [stderr]   --> src/library.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub struct Book {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] 47 |     pub title: String,
[INFO] [stderr] 48 |     author: String,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Book` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `length_with_borrow` is never used
[INFO] [stderr]   --> src/ownership.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn length_with_borrow(str: &String) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `route` is never read
[INFO] [stderr]   --> src/transport.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub struct Bus {
[INFO] [stderr]    |            --- field in this struct
[INFO] [stderr] 24 |     route: u32,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Blue` and `Gree` are never constructed
[INFO] [stderr]   --> src/transport.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub enum MetroLine {
[INFO] [stderr]    |          --------- variants in this enum
[INFO] [stderr] 35 |     Red,
[INFO] [stderr] 36 |     Blue,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 37 |     Gree,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `MetroLine` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `id` is never read
[INFO] [stderr]   --> src/unique_words.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Worker {
[INFO] [stderr]    |        ------ field in this struct
[INFO] [stderr] 55 |     pub id: usize,
[INFO] [stderr]    |         ^^
[INFO] [stderr] 
[INFO] [stderr] warning: `intro-to-rust` (bin "intro-to-rust" test) generated 10 warnings (run `cargo fix --bin "intro-to-rust" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/intro_to_rust-c748622c2418db17)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test library::tests::should_return_discount_for_student ... ok
[INFO] [stdout] test library::tests::should_return_book_with_discounted_cost_for_student ... ok
[INFO] [stdout] test library::tests::should_return_true_if_book_not_available ... ok
[INFO] [stdout] test library::tests::should_return_book_with_cost_of_borrowing ... ok
[INFO] [stdout] test library::tests::should_return_discount_for_visitor ... ok
[INFO] [stdout] test pattern_matching::tests::should_calculate_area ... ok
[INFO] [stdout] test library::tests::should_return_error_if_book_not_available_while_borrowing ... ok
[INFO] [stdout] test library::tests::should_return_false_if_book_not_available ... ok
[INFO] [stdout] test transport::test::should_calculate_fare_for_journey_by_metro ... ok
[INFO] [stdout] test transport::test::should_calculate_fare_for_journey_by_bus ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5e6d0f73d185967d6b697f7af7fe58771fb3508058c16a53bf0aea3f695a37a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e6d0f73d185967d6b697f7af7fe58771fb3508058c16a53bf0aea3f695a37a6", kill_on_drop: false }`
[INFO] [stdout] 5e6d0f73d185967d6b697f7af7fe58771fb3508058c16a53bf0aea3f695a37a6