[INFO] cloning repository https://github.com/ChikenduHillary/rust-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ChikenduHillary/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChikenduHillary%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChikenduHillary%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3914a3e4228e842519d3b482a8ff0b4d8595b07
[INFO] checking ChikenduHillary/rust-exercises against master#f5e2df741b4a9820a7579f0c8eccc951706a8782 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChikenduHillary%2Frust-exercises" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ChikenduHillary/rust-exercises
[INFO] finished tweaking git repo https://github.com/ChikenduHillary/rust-exercises
[INFO] tweaked toml for git repo https://github.com/ChikenduHillary/rust-exercises written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ChikenduHillary/rust-exercises on toolchain f5e2df741b4a9820a7579f0c8eccc951706a8782
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f5e2df741b4a9820a7579f0c8eccc951706a8782" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ChikenduHillary/rust-exercises 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" "+f5e2df741b4a9820a7579f0c8eccc951706a8782" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f5e2df741b4a9820a7579f0c8eccc951706a8782" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30604961ea24475746cc4326152e67d6b64cb0be8d1d7b2a7761e854a6f98f81
[INFO] running `Command { std: "docker" "start" "-a" "30604961ea24475746cc4326152e67d6b64cb0be8d1d7b2a7761e854a6f98f81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30604961ea24475746cc4326152e67d6b64cb0be8d1d7b2a7761e854a6f98f81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30604961ea24475746cc4326152e67d6b64cb0be8d1d7b2a7761e854a6f98f81", kill_on_drop: false }`
[INFO] [stdout] 30604961ea24475746cc4326152e67d6b64cb0be8d1d7b2a7761e854a6f98f81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f5e2df741b4a9820a7579f0c8eccc951706a8782" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b84fd0120e36f2971e1df4591203557354b596e9b2beb0bc89cccc56ca750529
[INFO] running `Command { std: "docker" "start" "-a" "b84fd0120e36f2971e1df4591203557354b596e9b2beb0bc89cccc56ca750529", kill_on_drop: false }`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/bin/a16.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Student {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 15 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `thiserror`
[INFO] [stdout]   --> src/bin/a27.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use thiserror::Error;
[INFO] [stdout]    |     ^^^^^^^^^ use of unresolved module or unlinked crate `thiserror`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `thiserror`, use `cargo add thiserror` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_channel`
[INFO] [stdout]   --> src/bin/a39.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crossbeam_channel::{unbounded, Receiver};
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `crossbeam_channel`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `crossbeam_channel`, use `cargo add crossbeam_channel` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MOCK_DATA` is never used
[INFO] [stdout]   --> src/bin/a32.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const MOCK_DATA: &'static str = include_str!("mock-data.csv");
[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 `Color` is never used
[INFO] [stdout]   --> src/bin/a28.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Color {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/bin/a39.rs:25:19
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::thread::{self, JoinHandle};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `msg_hello` is never used
[INFO] [stdout]   --> src/bin/a38.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn msg_hello() -> &'static str {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `msg_thread` is never used
[INFO] [stdout]   --> src/bin/a38.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn msg_thread() -> &'static str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `msg_excited` is never used
[INFO] [stdout]   --> src/bin/a38.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn msg_excited() -> &'static str {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Corporate` is never constructed
[INFO] [stdout]   --> src/bin/a40.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Corporate;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StoreFront` is never constructed
[INFO] [stdout]   --> src/bin/a40.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct StoreFront;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]   --> src/bin/a27.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 |     #[error("menu item not found")]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]   --> src/bin/a27.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 |     #[error("divide by zero error")]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/a39.rs:38:56
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn spawn_light_thread(receiver: Receiver<LightMsg>) -> JoinHandle<LightStatus> {
[INFO] [stdout]    |    ------------------                                  ^^^^^^^^^^^^^^^^^^^^^^^ expected `JoinHandle<LightStatus>`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `JoinHandle<LightStatus>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rgb` is never constructed
[INFO] [stdout]   --> src/bin/a37.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Rgb(u8, u8, u8);
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello` (bin "a39") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]   --> src/bin/a18.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Person {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 15 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     age: u8
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Person` 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] error[E0277]: `?` couldn't convert the error to `ProgramError`
[INFO] [stdout]   --> src/bin/a27.rs:47:23
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn run(step: i32) -> Result<(), ProgramError> {
[INFO] [stdout]    |                      ------------------------ expected `ProgramError` because of this
[INFO] [stdout] 46 |     if step == 1 {
[INFO] [stdout] 47 |         pick_menu("4")?;
[INFO] [stdout]    |         --------------^ the trait `From<MenuError>` is not implemented for `ProgramError`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         this can't be annotated with `?` because it has type `Result<_, MenuError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ProgramError` needs to implement `From<MenuError>`
[INFO] [stdout]   --> src/bin/a27.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum ProgramError {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: alternatively, `MenuError` needs to implement `Into<ProgramError>`
[INFO] [stdout]   --> src/bin/a27.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum MenuError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `ProgramError`
[INFO] [stdout]   --> src/bin/a27.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn run(step: i32) -> Result<(), ProgramError> {
[INFO] [stdout]    |                      ------------------------ expected `ProgramError` because of this
[INFO] [stdout] ...
[INFO] [stdout] 49 |         divide(1, 0)?;
[INFO] [stdout]    |         ------------^ the trait `From<MathError>` is not implemented for `ProgramError`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         this can't be annotated with `?` because it has type `Result<_, MathError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ProgramError` needs to implement `From<MathError>`
[INFO] [stdout]   --> src/bin/a27.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum ProgramError {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: alternatively, `MathError` needs to implement `Into<ProgramError>`
[INFO] [stdout]   --> src/bin/a27.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum MathError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `ProgramError` doesn't implement `Debug`
[INFO] [stdout]   --> src/bin/a27.rs:55:22
[INFO] [stdout]    |
[INFO] [stdout] 55 |     println!("{:?}", run(1));
[INFO] [stdout]    |               ----   ^^^^^^ `ProgramError` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]    |               |
[INFO] [stdout]    |               required by this formatting parameter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `ProgramError`
[INFO] [stdout]    = note: add `#[derive(Debug)]` to `ProgramError` or manually `impl Debug for ProgramError`
[INFO] [stdout]    = help: the trait `Debug` is implemented for `Result<T, E>`
[INFO] [stdout]    = note: required for `Result<(), ProgramError>` to implement `Debug`
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider annotating `ProgramError` with `#[derive(Debug)]`
[INFO] [stdout]    |
[INFO] [stdout] 14 + #[derive(Debug)]
[INFO] [stdout] 15 | enum ProgramError {}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `ProgramError` doesn't implement `Debug`
[INFO] [stdout]   --> src/bin/a27.rs:56:22
[INFO] [stdout]    |
[INFO] [stdout] 56 |     println!("{:?}", run(2));
[INFO] [stdout]    |               ----   ^^^^^^ `ProgramError` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]    |               |
[INFO] [stdout]    |               required by this formatting parameter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `ProgramError`
[INFO] [stdout]    = note: add `#[derive(Debug)]` to `ProgramError` or manually `impl Debug for ProgramError`
[INFO] [stdout]    = help: the trait `Debug` is implemented for `Result<T, E>`
[INFO] [stdout]    = note: required for `Result<(), ProgramError>` to implement `Debug`
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider annotating `ProgramError` with `#[derive(Debug)]`
[INFO] [stdout]    |
[INFO] [stdout] 14 + #[derive(Debug)]
[INFO] [stdout] 15 | enum ProgramError {}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Body` is never used
[INFO] [stdout]   --> src/bin/a30.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait Body {}
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Color` is never used
[INFO] [stdout]   --> src/bin/a30.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Color {}
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MOCK_DATA` is never used
[INFO] [stdout]   --> src/bin/a32.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const MOCK_DATA: &'static str = include_str!("mock-data.csv");
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello` (bin "a27" test) due to 7 previous errors
[INFO] [stdout] warning: variant `Blue` is never constructed
[INFO] [stdout]   --> src/bin/a12.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | enum Color {
[INFO] [stdout]    |      ----- variant in this enum
[INFO] [stdout] 28 |     Red,
[INFO] [stdout] 29 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b84fd0120e36f2971e1df4591203557354b596e9b2beb0bc89cccc56ca750529", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b84fd0120e36f2971e1df4591203557354b596e9b2beb0bc89cccc56ca750529", kill_on_drop: false }`
[INFO] [stdout] b84fd0120e36f2971e1df4591203557354b596e9b2beb0bc89cccc56ca750529
