[INFO] cloning repository https://github.com/victor-arutiunov/rust-basics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/victor-arutiunov/rust-basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvictor-arutiunov%2Frust-basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvictor-arutiunov%2Frust-basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e269d8195812c192bcdfdf1dfd92536ffad4ea1
[INFO] testing victor-arutiunov/rust-basics against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvictor-arutiunov%2Frust-basics" "/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/victor-arutiunov/rust-basics
[INFO] finished tweaking git repo https://github.com/victor-arutiunov/rust-basics
[INFO] tweaked toml for git repo https://github.com/victor-arutiunov/rust-basics written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/victor-arutiunov/rust-basics on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/victor-arutiunov/rust-basics 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d92eeeceb1ffc83a233d994a628e8ea4b0db0eb58a74d1e3cc1f7a6ede80e12f
[INFO] running `Command { std: "docker" "start" "-a" "d92eeeceb1ffc83a233d994a628e8ea4b0db0eb58a74d1e3cc1f7a6ede80e12f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d92eeeceb1ffc83a233d994a628e8ea4b0db0eb58a74d1e3cc1f7a6ede80e12f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d92eeeceb1ffc83a233d994a628e8ea4b0db0eb58a74d1e3cc1f7a6ede80e12f", kill_on_drop: false }`
[INFO] [stdout] d92eeeceb1ffc83a233d994a628e8ea4b0db0eb58a74d1e3cc1f7a6ede80e12f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2df18c93eb32bf89717a17926c8922fd48dea1754c84e527cae3e528e6cb3e32
[INFO] running `Command { std: "docker" "start" "-a" "2df18c93eb32bf89717a17926c8922fd48dea1754c84e527cae3e528e6cb3e32", kill_on_drop: false }`
[INFO] [stderr]    Compiling base_course v0.1.0 (/opt/rustwide/workdir)
[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: function `clamp` is never used
[INFO] [stdout]   --> src/bin/a22.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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `div` is never used
[INFO] [stdout]   --> src/bin/a22.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/a22.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn concat(first: &str, second: &str) -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `structopt`
[INFO] [stdout]   --> src/bin/p2-example.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | use structopt::StructOpt;
[INFO] [stdout]    |     ^^^^^^^^^ use of unresolved module or unlinked crate `structopt`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `structopt`, use `cargo add structopt` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `thiserror`
[INFO] [stdout]   --> src/bin/p2-example.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | 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: cannot find attribute `error` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:125:7
[INFO] [stdout]     |
[INFO] [stdout] 125 |     #[error("id must be a number: {0}")]
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `from` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:126:17
[INFO] [stdout]     |
[INFO] [stdout] 126 |     InvalidId(#[from] std::num::ParseIntError),
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:127:7
[INFO] [stdout]     |
[INFO] [stdout] 127 |     #[error("empty record")]
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:129:7
[INFO] [stdout]     |
[INFO] [stdout] 129 |     #[error("missing field: {0}")]
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:259:3
[INFO] [stdout]     |
[INFO] [stdout] 259 | #[structopt(about = "project 2: contact manager")]
[INFO] [stdout]     |   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:261:7
[INFO] [stdout]     |
[INFO] [stdout] 261 |     #[structopt(short, parse(from_os_str), default_value = "p2_data.csv")]
[INFO] [stdout]     |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:263:7
[INFO] [stdout]     |
[INFO] [stdout] 263 |     #[structopt(subcommand)]
[INFO] [stdout]     |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:265:7
[INFO] [stdout]     |
[INFO] [stdout] 265 |     #[structopt(short, help = "verbose")]
[INFO] [stdout]     |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:273:11
[INFO] [stdout]     |
[INFO] [stdout] 273 |         #[structopt(short)]
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]    --> src/bin/p2-example.rs:279:11
[INFO] [stdout]     |
[INFO] [stdout] 279 |         #[structopt(short)]
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `ParseError`
[INFO] [stdout]    --> src/bin/p2-example.rs:149:48
[INFO] [stdout]     |
[INFO] [stdout] 134 | fn parse_record(record: &str) -> Result<Record, ParseError> {
[INFO] [stdout]     |                                  -------------------------- expected `ParseError` because of this
[INFO] [stdout] ...
[INFO] [stdout] 149 |         Some(id) => i64::from_str_radix(id, 10)?,
[INFO] [stdout]     |                     ---------------------------^ the trait `From<ParseIntError>` is not implemented for `ParseError`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this can't be annotated with `?` because it has type `Result<_, ParseIntError>`
[INFO] [stdout]     |
[INFO] [stdout] note: `ParseError` needs to implement `From<ParseIntError>`
[INFO] [stdout]    --> src/bin/p2-example.rs:124:1
[INFO] [stdout]     |
[INFO] [stdout] 124 | enum ParseError {
[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]: `ParseError` doesn't implement `std::fmt::Display`
[INFO] [stdout]    --> src/bin/p2-example.rs:196:29
[INFO] [stdout]     |
[INFO] [stdout] 194 | ...                   "error on line number {}: {}\n  > \"{}\"\n",
[INFO] [stdout]     |                                                 -- required by this formatting parameter
[INFO] [stdout] 195 | ...                   num + 1,
[INFO] [stdout] 196 | ...                   e,
[INFO] [stdout]     |                       ^ `ParseError` cannot be formatted with the default formatter
[INFO] [stdout]     |
[INFO] [stdout] help: the trait `std::fmt::Display` is not implemented for `ParseError`
[INFO] [stdout]    --> src/bin/p2-example.rs:124:1
[INFO] [stdout]     |
[INFO] [stdout] 124 | enum ParseError {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/bin/a21.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct User {
[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 `find_user` is never used
[INFO] [stdout]   --> src/bin/a21.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_user(name: &str) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_args` found for struct `Opt` in the current scope
[INFO] [stdout]    --> src/bin/p2-example.rs:340:20
[INFO] [stdout]     |
[INFO] [stdout] 260 | struct Opt {
[INFO] [stdout]     | ---------- function or associated item `from_args` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 340 |     let opt = Opt::from_args();
[INFO] [stdout]     |                    ^^^^^^^^^ function or associated item not found in `Opt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/a23.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn part_1() -> bool {
[INFO] [stdout]    |                ---- expected `bool` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 16 |     maybe_access("admin")
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found `Option<Access>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `bool`
[INFO] [stdout]               found enum `Option<Access>`
[INFO] [stdout] help: use `Option::is_some` to test if the `Option` has a value
[INFO] [stdout]    |
[INFO] [stdout] 16 |     maybe_access("admin").is_some()
[INFO] [stdout]    |                          ++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/a23.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn part_3() -> Access {
[INFO] [stdout]    |                ------ expected `Access` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 29 |     maybe_access("Alice")
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^ expected `Access`, found `Option<Access>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `Access`
[INFO] [stdout]               found enum `Option<Access>`
[INFO] [stdout] help: consider using `Option::expect` to unwrap the `Option<Access>` value, panicking if the value is an `Option::None`
[INFO] [stdout]    |
[INFO] [stdout] 29 |     maybe_access("Alice").expect("REASON")
[INFO] [stdout]    |                          +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[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] [stderr] error: could not compile `base_course` (bin "a23") due to 2 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432, E0599.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `base_course` (bin "p2-example") due to 15 previous errors
[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[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]   --> /rustc/c2e32f1c9652b13ed99608599c1e855462f421f3/library/core/src/result.rs:552:15
[INFO] [stdout]    = note: required for `Result<(), ProgramError>` to implement `Debug`
[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]   --> /rustc/c2e32f1c9652b13ed99608599c1e855462f421f3/library/core/src/result.rs:552:15
[INFO] [stdout]    = note: required for `Result<(), ProgramError>` to implement `Debug`
[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] [stderr] error: could not compile `base_course` (bin "a27") due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "2df18c93eb32bf89717a17926c8922fd48dea1754c84e527cae3e528e6cb3e32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2df18c93eb32bf89717a17926c8922fd48dea1754c84e527cae3e528e6cb3e32", kill_on_drop: false }`
[INFO] [stdout] 2df18c93eb32bf89717a17926c8922fd48dea1754c84e527cae3e528e6cb3e32
