prompt: Create a Rust program that generates UUIDs using the uuid crate. Include `fn main()` that generates and prints multiple UUIDs. Output only Rust code in ```rust code blocks.

error_type: other

compile_error:
error[E0599]: no function or associated item named `new_v5` found for struct `Uuid` in the current scope
   --> src/main.rs:7:23
    |
7   |     let uuid2 = Uuid::new_v5(&Uuid::parse_str("00000000-0000-0000-0000-000000000000"));
    |                       ^^^^^^ function or associated item not found in `Uuid`
    |
note: if you're trying to build a new `Uuid` consider using one of the following associated functions:
      uuid::builder::<impl Uuid>::nil
      uuid::builder::<impl Uuid>::max
      uuid::builder::<impl Uuid>::from_fields
      uuid::builder::<impl Uuid>::from_fields_le
      and 11 others
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/uuid-1.18.1/src/builder.rs:72:5
    |
72  |     pub const fn nil() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
98  |     pub const fn max() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
122 |     pub const fn from_fields(d1: u32, d2: u16, d3: u16, d4: &[u8; 8]) -> Uuid {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^


prompt: Create a Rust program with a struct, an impl block, and a trait implementation. Include `fn main()` to demonstrate usage. Output only code in ```rust code blocks.

code:
struct Point {
    x: f64,
    y: f64,
}

impl Point {
    fn new(x: f64, y: f64) -> Self {
        Self { x, y }
    }
}

trait Add {
    fn add(&self, other: Self) -> Self;
}

impl Add for Point {
    fn add(&self, other: Self) -> Self {
        Self::new(self.x + other.x, self.y + other.y)
    }
}

fn main() {
    let p1 = Point::new(1.0, 2.0);
    let p2 = Point::new(3.0, 4.0);
    let p3 = p1.add(p2);
    println!("{:?}", p3);
}

compile_error:
error[E0277]: `Point` doesn't implement `Debug`
  --> src/main.rs:26:22
   |
26 |     println!("{:?}", p3);
   |                      ^^ `Point` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `Point`
   = note: add `#[derive(Debug)]` to `Point` or manually `impl Debug for Point`
   = 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)
help: consider annotating `Point` with `#[derive(Debug)]`
   |
1  + #[derive(Debug)]
2  | struct Point {
   |

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Person {
    first_name: String,
    last_name: String,
    age: u8,
}

fn main() {
    let person = Person {
        first_name: "John".to_string(),
        last_name: "Doe".to_string(),
        age: 25,
    };

    let json = serde_json::to_string(&person).unwrap();
    println!("{}", json);

    let person: Person = serde_json::from_str(&json).unwrap();
    println!("{:?}", person);
}

compile_error:
error[E0277]: `Person` doesn't implement `Debug`
  --> src/main.rs:21:22
   |
21 |     println!("{:?}", person);
   |                      ^^^^^^ `Person` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `Person`
   = note: add `#[derive(Debug)]` to `Person` or manually `impl Debug for Person`
   = 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)
help: consider annotating `Person` with `#[derive(Debug)]`
   |
4  + #[derive(Debug)]
5  | struct Person {
   |

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Create a small example showing a thiserror enum, Display, a source cause, and a function using the ? operator. Include `fn main()` to drive it. Output only Rust code wrapped in ```rust code blocks.

code:
use std::io;

#[derive(thiserror::Error, Debug)]
enum Error {
    #[error("IoError: {0}")]
    Io(io::Error),
    #[error("OtherError: {0}")]
    Other(String),
}

fn main() -> Result<(), Error> {
    let _ = try {
        let _ = io::Error::last_os_error();
        Ok(())
    }?;

    let _ = try {
        let _ = String::from("error");
        Ok(())
    }?;

    Ok(())
}

error_type: other

compile_error:
error[E0658]: `try` expression is experimental
  --> src/main.rs:12:13
   |
12 |       let _ = try {
   |  _____________^
13 | |         let _ = io::Error::last_os_error();
14 | |         Ok(())
15 | |     }?;
   | |_____^
   |
   = note: see issue #31436 <https://github.com/rust-lang/rust/issues/31436> for more information

error[E0658]: `try` expression is experimental
  --> src/main.rs:17:13
   |
17 |       let _ = try {
   |  _____________^
18 | |         let _ = String::from("error");
19 | |         Ok(())
20 | |     }?;
   | |_____^
   |
   = note: see issue #31436 <https://github.com/rust-lang/rust/issues/31436> for more information

error[E0282]: type annotations needed
  --> src/main.rs:14:9
   |
14 |         Ok(())
   |         ^^ cannot infer type of the type parameter `E` declared on the enum `Result`
   |
help: consider specifying the generic arguments
   |
14 |         Ok::<(), E>(())
   |           +++++++++

Some errors have detailed explanations: E0282, E0658.
For more


prompt: Create a Rust program that generates UUIDs using the uuid crate. Include `fn main()` that generates and prints multiple UUIDs. Output only Rust code in ```rust code blocks.

code:
use uuid::Uuid;

fn main() {
    println!("{}", Uuid::new_v4());
    println!("{}", Uuid::new_v5(Uuid::NAMESPACE_DNS, "example.com"));
    println!("{}", Uuid::parse_str("a2b7e9b2-2d8c-4f6a-92c6-4e6a6a1d1e11").unwrap());
}

error_type: other

compile_error:
error[E0599]: no function or associated item named `new_v5` found for struct `Uuid` in the current scope
   --> src/main.rs:5:26
    |
5   |     println!("{}", Uuid::new_v5(Uuid::NAMESPACE_DNS, "example.com"));
    |                          ^^^^^^ function or associated item not found in `Uuid`
    |
note: if you're trying to build a new `Uuid` consider using one of the following associated functions:
      uuid::builder::<impl Uuid>::nil
      uuid::builder::<impl Uuid>::max
      uuid::builder::<impl Uuid>::from_fields
      uuid::builder::<impl Uuid>::from_fields_le
      and 11 others
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/uuid-1.18.1/src/builder.rs:72:5
    |
72  |     pub const fn nil() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
98  |     pub const fn max() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
122 |     pub const fn from_fields(d1: u32, d2: u16, d3: u16, d4: &[u8; 8]) -> Uuid {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


prompt: Write only Rust code for a program that uses iterators with map/filter to compute a sum. Include `fn main()` and necessary imports. No explanations. Wrap code in ```rust code blocks.

code:
use std::env;
use std::fs::File;
use std::io::{BufRead, BufReader};
use std::path::Path;

fn main() {
    let file = File::open("data.txt").unwrap();
    let reader = BufReader::new(file);

    let numbers: Vec<i32> = reader
       .lines()
       .filter_map(|x| x.ok())
       .filter_map(|x| x.parse().ok())
       .filter(|&x| x % 2 == 0)
       .map(|x| x * x)
       .collect();

    let sum: i32 = numbers.iter().sum();

    println!("Sum: {}", sum);
}

error_type: other

compile_error:
warning: unused import: `std::env`
 --> src/main.rs:1:5
  |
1 | use std::env;
  |     ^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused import: `std::path::Path`
 --> src/main.rs:4:5
  |
4 | use std::path::Path;
  |     ^^^^^^^^^^^^^^^

error[E0284]: type annotations needed
  --> src/main.rs:15:14
   |
13 |        .filter_map(|x| x.parse().ok())
   |                          ----- type must be known at this point
14 |        .filter(|&x| x % 2 == 0)
15 |        .map(|x| x * x)
   |              ^
   |
   = note: cannot satisfy `<_ as FromStr>::Err == _`
help: consider giving this closure parameter an explicit type
   |
15 |        .map(|x: /* Type */| x * x)
   |               ++++++++++++

For more information about this error, try `rustc --explain E0284`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error; 2 warnings emitted


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Person {
    name: String,
    age: u8,
    address: Address,
}

#[derive(Serialize, Deserialize)]
struct Address {
    street: String,
    city: String,
    state: String,
}

fn main() {
    let mut p = Person {
        name: "John".to_string(),
        age: 30,
        address: Address {
            street: "123 Main St".to_string(),
            city: "Anytown".to_string(),
            state: "CA".to_string(),

compile_error:
error[E0277]: `Person` doesn't implement `Debug`
  --> src/main.rs:32:43
   |
32 |     println!("Deserialized Person: {:?}", new_person);
   |                                           ^^^^^^^^^^ `Person` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `Person`
   = note: add `#[derive(Debug)]` to `Person` or manually `impl Debug for Person`
   = 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)

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Write only a single Rust source file (main.rs) with a `fn main() -> anyhow::Result<()>` that demonstrates basic anyhow error handling. Do not explain; output only Rust code wrapped in ```rust code blo

code:
use anyhow::{Context, Result};
use std::fs::File;
use std::io::{self, Read, Write};
use std::path::Path;

fn main() -> anyhow::Result<()> {
    let file = File::open("foo.txt")
       .with_context(|| "Failed to open file 'foo.txt'")?;

    let mut contents = String::new();
    file.read_to_string(&mut contents)
       .with_context(|| "Failed to read 'foo.txt'")?;

    println!("{}", contents);

    let mut file = File::create("bar.txt")
       .with_context(|| "Failed to create file 'bar.txt'"

compile_error:
warning: unused import: `Result`
 --> src/main.rs:1:23
  |
1 | use anyhow::{Context, Result};
  |                       ^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused import: `self`
 --> src/main.rs:3:15
  |
3 | use std::io::{self, Read, Write};
  |               ^^^^

warning: unused import: `std::path::Path`
 --> src/main.rs:4:5
  |
4 | use std::path::Path;
  |     ^^^^^^^^^^^^^^^

error[E0596]: cannot borrow `file` as mutable, as it is not declared as mutable
  --> src/main.rs:11:5
   |
11 |     file.read_to_string(&mut contents)
   |     ^^^^ cannot borrow as mutable
   |
help: consider changing this to be mutable
   |
7  |     let mut file = File::open("foo.txt")
   |         +++

For more information about this error, try `rustc --explain E0596`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error; 3 warnings emitted


prompt: Write a Rust program that uses the rand crate to generate random numbers and select random items from a vector. Include `fn main()`. Output only Rust code in ```rust code blocks.

code:
use rand::prelude::*;

fn main() {
    let mut rng = thread_rng();
    let mut v = vec!['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J'];
    let mut count = 0;

    println!("Random selection of 10 items:");
    for _ in 0..10 {
        let idx = rng.gen_range(0, v.len());
        let item = v.swap_remove(idx);
        println!("{}", item);
        count += 1;
    }

    println!("\nRandom number:");
    println!("{}", rng.gen_range(0, 100));
    println!("\nRandom float:");
    println!("{}",

compile_error:
error[E0277]: the trait bound `{integer}: SampleRange<_>` is not satisfied
   --> src/main.rs:10:33
    |
10  |         let idx = rng.gen_range(0, v.len());
    |                       --------- ^ the trait `SampleRange<_>` is not implemented for `{integer}`
    |                       |
    |                       required by a bound introduced by this call
    |
    = help: the following other types implement trait `SampleRange<T>`:
              RangeInclusive<T>
              std::ops::Range<T>
note: required by a bound in `gen_range`
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/rand-0.8.5/src/rng.rs:132:12
    |
129 |     fn gen_range<T, R>(&mut self, range: R) -> T
    |        --------- required by a bound in this associated function
...
132 |         R: SampleRange<T>
    |            ^^^^^^^^^^^^^^ required by this bound in `Rng::gen_range`

error[E0061]: this method takes 1 argument but 2 arguments were supplied
   --> src/main.rs:10:23
    |
10  |


prompt: Write a Rust program that uses chrono to parse a date string and format it differently. Include `fn main()` with example dates. Output only Rust code in ```rust code blocks.

code:
use chrono::{DateTime, NaiveDate, NaiveDateTime, Utc};
use chrono::format::{FormatItem, FormatResult, StrftimeItems, Timelike};

pub struct CustomFormatter {
    pub prefix: String,
    pub suffix: String,
}

impl CustomFormatter {
    pub fn new(prefix: String, suffix: String) -> CustomFormatter {
        CustomFormatter { prefix, suffix }
    }
}

impl FormatItem for CustomFormatter {
    fn emit(
        &self,
        f: &mut FormatResult,
        value: &str,
        _: &str,
        _: &st

error_type: other

compile_error:
error[E0432]: unresolved imports `chrono::format::FormatItem`, `chrono::format::FormatResult`, `chrono::format::Timelike`
 --> src/main.rs:2:22
  |
2 | use chrono::format::{FormatItem, FormatResult, StrftimeItems, Timelike};
  |                      ^^^^^^^^^^  ^^^^^^^^^^^^                 ^^^^^^^^ no `Timelike` in `format`
  |                      |           |
  |                      |           no `FormatResult` in `format`
  |                      no `FormatItem` in `format`
  |                      help: a similar name exists in the module: `format_item`
  |
  = help: consider importing this trait instead:
          chrono::Timelike

warning: unused import: `DateTime`
 --> src/main.rs:1:14
  |
1 | use chrono::{DateTime, NaiveDate, NaiveDateTime, Utc};
  |              ^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused import: `StrftimeItems`
 --> src/main.rs:2:48
  |
2 | use chrono::format::{FormatItem, FormatResult, StrftimeItems, Timelike};
  |


prompt: Create a Rust program that generates UUIDs using the uuid crate. Include `fn main()` that generates and prints multiple UUIDs. Output only Rust code in ```rust code blocks.

code:
use uuid::Uuid;

fn main() {
    let uuid1 = Uuid::new_v4();
    let uuid2 = Uuid::new_v5(Uuid::NAMESPACE_DNS, "rust-lang.org");
    let uuid3 = Uuid::parse_str("a3c2a2d2-2d3a-11e6-86d9-2c7c6bf9a9f9").unwrap();

    println!("uuid1: {}", uuid1);
    println!("uuid2: {}", uuid2);
    println!("uuid3: {}", uuid3);
}

error_type: other

compile_error:
error[E0599]: no function or associated item named `new_v5` found for struct `Uuid` in the current scope
   --> src/main.rs:5:23
    |
5   |     let uuid2 = Uuid::new_v5(Uuid::NAMESPACE_DNS, "rust-lang.org");
    |                       ^^^^^^ function or associated item not found in `Uuid`
    |
note: if you're trying to build a new `Uuid` consider using one of the following associated functions:
      uuid::builder::<impl Uuid>::nil
      uuid::builder::<impl Uuid>::max
      uuid::builder::<impl Uuid>::from_fields
      uuid::builder::<impl Uuid>::from_fields_le
      and 11 others
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/uuid-1.18.1/src/builder.rs:72:5
    |
72  |     pub const fn nil() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
98  |     pub const fn max() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
122 |     pub const fn from_fields(d1: u32, d2: u16, d3: u16, d4: &[u8; 8]) -> Uuid {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


prompt: Write only Rust code for a program that uses iterators with map/filter to compute a sum. Include `fn main()` and necessary imports. No explanations. Wrap code in ```rust code blocks.

code:
use std::iter;

fn main() {
    let numbers: Vec<i32> = vec![1, 2, 3, 4, 5];
    let even_numbers: Vec<i32> = numbers.iter().filter(|x| x % 2 == 0).cloned().collect();

    let sum: i32 = even_numbers.iter().sum();

    println!("Sum of even numbers is: {}", sum);
}

error_type: other

compile_error:
warning: unused import: `std::iter`
 --> src/main.rs:1:5
  |
1 | use std::iter;
  |     ^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

error[E0369]: cannot calculate the remainder of `&&i32` divided by `{integer}`
 --> src/main.rs:5:62
  |
5 |     let even_numbers: Vec<i32> = numbers.iter().filter(|x| x % 2 == 0).cloned().collect();
  |                                                            - ^ - {integer}
  |                                                            |
  |                                                            &&i32
  |
help: `%` can be used on `&i32` if you dereference the left-hand side
  |
5 |     let even_numbers: Vec<i32> = numbers.iter().filter(|x| *x % 2 == 0).cloned().collect();
  |                                                            +

For more information about this error, try `rustc --explain E0369`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error; 1 warning emitted


prompt: Write a Rust program that uses chrono to parse a date string and format it differently. Include `fn main()` with example dates. Output only Rust code in ```rust code blocks.

code:
use chrono::{DateTime, Utc, Local, NaiveDateTime, Datelike, Timelike, TimeZone, SecondsFormat, Utc, FixedOffset, TimeZone};
use chrono::format::{self, FormatItem, ParseResult, ParseError, ParseFromStr, ParseFromStrRadix10};
use chrono::format::Item::*;
use chrono::format::StrftimeItems::*;
use chrono::format::StrftimeItems::*;
use chrono::format::Weekday::*;
use chrono::format::Month::*;
use chrono::format::Weekday::*;
use chrono::format::Month::*;
use chrono::format::YearStyle::*;
use chrono::f

error_type: other

compile_error:
error[E0252]: the name `Utc` is defined multiple times
 --> src/main.rs:1:96
  |
1 | use chrono::{DateTime, Utc, Local, NaiveDateTime, Datelike, Timelike, TimeZone, SecondsFormat, Utc, FixedOffset, TimeZone};
  |                        ---                                                                     ^^^--
  |                        |                                                                       |
  |                        |                                                                       `Utc` reimported here
  |                        previous import of the type `Utc` here                                  help: remove unnecessary import
  |
  = note: `Utc` must be defined only once in the type namespace of this module

error[E0252]: the name `TimeZone` is defined multiple times
 --> src/main.rs:1:114
  |
1 | use chrono::{DateTime, Utc, Local, NaiveDateTime, Datelike, Timelike, TimeZone, SecondsFormat, Utc, FixedOffset, TimeZone};
  |


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Person {
    name: String,
    age: u8,
    address: Address,
}

#[derive(Serialize, Deserialize)]
struct Address {
    street: String,
    city: String,
    country: String,
}

fn main() {
    let person = Person {
        name: "John".to_string(),
        age: 30,
        address: Address {
            street: "123 Main St".to_string(),
            city: "New York".to_string(),
            country: "USA".to_string()

compile_error:
error[E0277]: `Person` doesn't implement `Debug`
  --> src/main.rs:32:37
   |
32 |     println!("deserialized = {:?}", deserialized);
   |                                     ^^^^^^^^^^^^ `Person` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `Person`
   = note: add `#[derive(Debug)]` to `Person` or manually `impl Debug for Person`
   = 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)

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Serialize, Deserialize};
use serde_json;

#[derive(Serialize, Deserialize)]
struct User {
    id: u32,
    name: String,
    email: String,
}

fn main() {
    let user = User {
        id: 1,
        name: "John".to_string(),
        email: "john@example.com".to_string(),
    };

    let json = serde_json::to_string(&user).unwrap();
    println!("Serialized JSON: {}", json);

    let user2: User = serde_json::from_str(&json).unwrap();
    println!("Deserialized JSON: {:?}", user2);
}

compile_error:
error[E0277]: `User` doesn't implement `Debug`
  --> src/main.rs:22:41
   |
22 |     println!("Deserialized JSON: {:?}", user2);
   |                                         ^^^^^ `User` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `User`
   = note: add `#[derive(Debug)]` to `User` or manually `impl Debug for User`
   = 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)
help: consider annotating `User` with `#[derive(Debug)]`
   |
5  + #[derive(Debug)]
6  | struct User {
   |

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Write a complete Rust program with `fn main()` that demonstrates pattern matching with `match` and `if let`. Include necessary imports. Output only code in ```rust code blocks.

code:
// Import necessary libraries
use std::env;
use std::process;

fn main() {
    // Define an enum to represent the possible values
    enum Animal {
        Cat,
        Dog,
        Bird,
        Unknown,
    }

    // Create a vector to store animal names
    let animals = vec![
        Animal::Cat,
        Animal::Dog,
        Animal::Bird,
        Animal::Unknown,
    ];

    // Pattern match and print the type of animal
    for animal in animals {
        match animal {
            Animal::C

error_type: other

compile_error:
warning: unused variable: `program_name`
  --> src/main.rs:61:9
   |
61 |     let program_name = env::args().next().unwrap();
   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_program_name`
   |
   = note: `#[warn(unused_variables)]` on by default

error[E0382]: use of moved value: `animals`
  --> src/main.rs:33:19
   |
15 |     let animals = vec![
   |         ------- move occurs because `animals` has type `Vec<Animal>`, which does not implement the `Copy` trait
...
23 |     for animal in animals {
   |                   ------- `animals` moved due to this implicit call to `.into_iter()`
...
33 |     for animal in animals {
   |                   ^^^^^^^ value used here after move
   |
note: `into_iter` takes ownership of the receiver `self`, which moves `animals`
  --> /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/iter/traits/collect.rs:346:18
help: consider iterating over a slice of the `Vec<Animal>`'s content to avoid moving


prompt: Create a small example showing a thiserror enum, Display, a source cause, and a function using the ? operator. Include `fn main()` to drive it. Output only Rust code wrapped in ```rust code blocks.

code:
use thiserror::Error;

#[derive(Error, Debug)]
pub enum Error {
    #[error("Cannot read file {0}")]
    IoError(#[from] std::io::Error),
    #[error("Cannot parse string: {0}")]
    ParseError(String),
}

fn main() -> Result<(), Error> {
    let f = std::fs::File::open("non-existent-file")?;
    let s = std::str::from_utf8(&f.read_to_string(&mut std::io::sink()?)?);
    let _: u8 = s?.parse()?;
    Ok(())
}

compile_error:
error[E0599]: no method named `read_to_string` found for struct `File` in the current scope
  --> src/main.rs:13:36
   |
13 |     let s = std::str::from_utf8(&f.read_to_string(&mut std::io::sink()?)?);
   |                                    ^^^^^^^^^^^^^^
  --> /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/io/mod.rs:904:8
   |
   = note: the method is available for `File` here
   |
   = help: items from traits can only be used if the trait is in scope
help: trait `Read` which provides `read_to_string` is implemented but not in scope; perhaps you want to import it
   |
1  + use std::io::Read;
   |
help: there is a method `read_to_end` with a similar name
   |
13 |     let s = std::str::from_utf8(&f.read_to_end(&mut std::io::sink()?)?);
   |                                    ~~~~~~~~~~~

error[E0277]: the `?` operator can only be applied to values that implement `Try`
  --> src/main.rs:13:56
   |
13 |     let s = std::str::from_utf8(&f.read_to_string(&mut std::io::sin


prompt: Create a Rust program that generates UUIDs using the uuid crate. Include `fn main()` that generates and prints multiple UUIDs. Output only Rust code in ```rust code blocks.

code:
use uuid::Uuid;

fn main() {
    let uuid1 = Uuid::new_v4();
    let uuid2 = Uuid::new_v5(Uuid::NAMESPACE_DNS, "example.com");
    let uuid3 = Uuid::new_v5(Uuid::NAMESPACE_URL, "https://example.com");
    let uuid4 = Uuid::new_v5(Uuid::NAMESPACE_OID, "1.2.3");
    let uuid5 = Uuid::new_v5(Uuid::NAMESPACE_URL, "https://example.com");

    println!("{:?}", uuid1);
    println!("{:?}", uuid2);
    println!("{:?}", uuid3);
    println!("{:?}", uuid4);
    println!("{:?}", uuid5);
}

error_type: other

compile_error:
error[E0599]: no function or associated item named `new_v5` found for struct `Uuid` in the current scope
   --> src/main.rs:5:23
    |
5   |     let uuid2 = Uuid::new_v5(Uuid::NAMESPACE_DNS, "example.com");
    |                       ^^^^^^ function or associated item not found in `Uuid`
    |
note: if you're trying to build a new `Uuid` consider using one of the following associated functions:
      uuid::builder::<impl Uuid>::nil
      uuid::builder::<impl Uuid>::max
      uuid::builder::<impl Uuid>::from_fields
      uuid::builder::<impl Uuid>::from_fields_le
      and 11 others
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/uuid-1.18.1/src/builder.rs:72:5
    |
72  |     pub const fn nil() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
98  |     pub const fn max() -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
...
122 |     pub const fn from_fields(d1: u32, d2: u16, d3: u16, d4: &[u8; 8]) -> Uuid {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Person {
    first_name: String,
    last_name: String,
    age: i32,
}

fn main() {
    let person = Person {
        first_name: "John".to_string(),
        last_name: "Doe".to_string(),
        age: 25,
    };

    let json = serde_json::to_string(&person).unwrap();

    println!("{}", json);

    let deserialized_person: Person = serde_json::from_str(&json).unwrap();

    println!("{:#?}", deserialized_person);
}

compile_error:
error[E0277]: `Person` doesn't implement `Debug`
  --> src/main.rs:23:23
   |
23 |     println!("{:#?}", deserialized_person);
   |                       ^^^^^^^^^^^^^^^^^^^ `Person` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `Person`
   = note: add `#[derive(Debug)]` to `Person` or manually `impl Debug for Person`
   = 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)
help: consider annotating `Person` with `#[derive(Debug)]`
   |
4  + #[derive(Debug)]
5  | struct Person {
   |

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Write a Rust program that uses the rand crate to generate random numbers and select random items from a vector. Include `fn main()`. Output only Rust code in ```rust code blocks.

code:
use rand::prelude::*;

fn main() {
    let random_number: u32 = rand::thread_rng().gen_range(0, 10);

    let random_number_list: Vec<String> = vec![
        "apple".to_string(),
        "banana".to_string(),
        "cherry".to_string(),
        "date".to_string(),
        "elderberry".to_string(),
        "fig".to_string(),
        "grape".to_string(),
        "honeydew".to_string(),
        "ice cream".to_string(),
        "jackfruit".to_string(),
    ];

    let random_string: String = rando

compile_error:
error[E0277]: the trait bound `{integer}: SampleRange<_>` is not satisfied
   --> src/main.rs:4:59
    |
4   |     let random_number: u32 = rand::thread_rng().gen_range(0, 10);
    |                                                 --------- ^ the trait `SampleRange<_>` is not implemented for `{integer}`
    |                                                 |
    |                                                 required by a bound introduced by this call
    |
    = help: the following other types implement trait `SampleRange<T>`:
              RangeInclusive<T>
              std::ops::Range<T>
note: required by a bound in `gen_range`
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/rand-0.8.5/src/rng.rs:132:12
    |
129 |     fn gen_range<T, R>(&mut self, range: R) -> T
    |        --------- required by a bound in this associated function
...
132 |         R: SampleRange<T>
    |            ^^^^^^^^^^^^^^ required by this bound in `Rng::gen_range`

error[E0061]:


prompt: Write a Rust program that uses chrono to parse a date string and format it differently. Include `fn main()` with example dates. Output only Rust code in ```rust code blocks.

code:
use chrono::prelude::*;

fn main() {
    let date_str = "2022-01-01T12:30:30Z";
    let date = DateTime::parse_from_rfc3339(date_str).unwrap();
    println!("Date: {}", date.format("%Y-%m-%d").to_string());
    println!("Time: {}", date.format("%H:%M:%S").to_string());
    println!("UTC Offset: {}", date.offset().offset().num_minutes());
    println!("ISO 8601: {}", date.format("%Y-%m-%dT%H:%M:%SZ").to_string());
    println!("Weekday: {}", date.weekday());
    println!("Day of week: {}", date.w

error_type: other

compile_error:
error[E0599]: no method named `offset` found for reference `&FixedOffset` in the current scope
 --> src/main.rs:8:46
  |
8 |     println!("UTC Offset: {}", date.offset().offset().num_minutes());
  |                                ----          ^^^^^^ method not found in `&FixedOffset`
  |                                |
  |                                method `offset` is available on `&chrono::DateTime<FixedOffset>`

error[E0599]: no method named `name` found for enum `Weekday` in the current scope
  --> src/main.rs:11:48
   |
11 |     println!("Day of week: {}", date.weekday().name());
   |                                                ^^^^
   |
help: there is a method `ne` with a similar name, but with different arguments
  --> /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/cmp.rs:261:5

error[E0599]: no method named `num_weeks_from_start` found for enum `Weekday` in the current scope
  --> src/main.rs:18:52
   |
18 |     println!("Weekday of year: {}", date.wee


prompt: Write only a single Rust source file (main.rs) with a `fn main() -> anyhow::Result<()>` that demonstrates basic anyhow error handling. Do not explain; output only Rust code wrapped in ```rust code blo

code:
use anyhow::Result;

fn main() -> Result<()> {
    let a: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;
    let b: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;
    let c: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;
    let d: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;

    let x = 1;
    let y = 2;

    let z = x + y;
    let w = b + c;
    let q = a + d;

    if z == w || z == q {
        O

compile_error:
error: cannot find macro `anyhow` in this scope
 --> src/main.rs:4:53
  |
4 |     let a: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;
  |                                                     ^^^^^^
  |
  = note: `anyhow` is in scope, but it is a crate, not a macro
help: consider importing this macro
  |
1 + use anyhow::anyhow;
  |

error: cannot find macro `anyhow` in this scope
 --> src/main.rs:5:53
  |
5 |     let b: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;
  |                                                     ^^^^^^
  |
  = note: `anyhow` is in scope, but it is a crate, not a macro
help: consider importing this macro
  |
1 + use anyhow::anyhow;
  |

error: cannot find macro `anyhow` in this scope
 --> src/main.rs:6:53
  |
6 |     let c: i32 = "not an i32".parse().map_err(|err| anyhow!("could not parse"))?;
  |                                                     ^^^^^^
  |
  = note: `anyhow` is in scope, but it is a crate, not


prompt: Create a small example showing a thiserror enum, Display, a source cause, and a function using the ? operator. Include `fn main()` to drive it. Output only Rust code wrapped in ```rust code blocks.

code:
use thiserror::Error;
use std::fmt;

#[derive(Debug, Error, PartialEq)]
pub enum MyError {
    #[error("This is a custom error with a cause")]
    Custom { source: Box<dyn fmt::Debug> },
    #[error("This is a custom error without a cause")]
    NoCause,
    #[error("This is a custom error with a message")]
    CustomMessage(String),
}

fn foo() -> Result<(), MyError> {
    Err(MyError::Custom {
        source: Box::new(42),
    })?;
    Ok(())
}

fn main() {
    let r = foo();
    match r {

error_type: other

compile_error:
error[E0599]: the method `as_dyn_error` exists for reference `&Box<dyn Debug>`, but its trait bounds were not satisfied
 --> src/main.rs:7:14
  |
7 |     Custom { source: Box<dyn fmt::Debug> },
  |              ^^^^^^ method cannot be called on `&Box<dyn Debug>` due to unsatisfied trait bounds
  |
  = note: the following trait bounds were not satisfied:
          `Box<dyn Debug>: std::error::Error`
          which is required by `Box<dyn Debug>: AsDynError<'_>`
          `&Box<dyn Debug>: std::error::Error`
          which is required by `&Box<dyn Debug>: AsDynError<'_>`
          `dyn Debug: Sized`
          which is required by `dyn Debug: AsDynError<'_>`
          `dyn Debug: std::error::Error`
          which is required by `dyn Debug: AsDynError<'_>`

error[E0369]: binary operation `==` cannot be applied to type `&Box<dyn Debug>`
 --> src/main.rs:7:14
  |
4 | #[derive(Debug, Error, PartialEq)]
  |                        --------- in this derive macro expansion
...
7 |     Custom {


prompt: Write only Rust code for a program that uses iterators with map/filter to compute a sum. Include `fn main()` and necessary imports. No explanations. Wrap code in ```rust code blocks.

code:
fn main() {
    let numbers = vec![1, 2, 3, 4, 5];

    let even_numbers = numbers.iter().filter(|&x| x % 2 == 0);
    let sum = even_numbers.map(|x| x * x).sum();

    println!("{}", sum);
}

error_type: other

compile_error:
error[E0283]: type annotations needed
 --> src/main.rs:5:9
  |
5 |     let sum = even_numbers.map(|x| x * x).sum();
  |         ^^^                               --- type must be known at this point
  |
  = note: cannot satisfy `_: Sum<i32>`
  = help: the following types implement trait `Sum<A>`:
            `Duration` implements `Sum<&'a Duration>`
            `Duration` implements `Sum`
            `Option<T>` implements `Sum<Option<U>>`
            `Result<T, E>` implements `Sum<Result<U, E>>`
            `Simd<f32, N>` implements `Sum<&'a Simd<f32, N>>`
            `Simd<f32, N>` implements `Sum`
            `Simd<f64, N>` implements `Sum<&'a Simd<f64, N>>`
            `Simd<f64, N>` implements `Sum`
          and 72 others
note: required by a bound in `std::iter::Iterator::sum`
 --> /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/iter/traits/iterator.rs:3572:5
help: consider giving `sum` an explicit type
  |
5 |     let sum: /* Type */ = even_numbers.map(|x| x * x


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Serialize, Deserialize};
use serde_json;

#[derive(Serialize, Deserialize)]
struct User {
    name: String,
    age: u8,
    email: String,
    address: Address,
}

#[derive(Serialize, Deserialize)]
struct Address {
    street: String,
    city: String,
    state: String,
    zip: String,
}

fn main() {
    let user = User {
        name: "John".to_string(),
        age: 32,
        email: "john@example.com".to_string(),
        address: Address {
            street: "123 Main St".to

compile_error:
error[E0277]: `User` doesn't implement `Debug`
  --> src/main.rs:37:22
   |
37 |     println!("{:?}", user_from_json);
   |                      ^^^^^^^^^^^^^^ `User` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `User`
   = note: add `#[derive(Debug)]` to `User` or manually `impl Debug for User`
   = 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)

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Create a small example showing a thiserror enum, Display, a source cause, and a function using the ? operator. Include `fn main()` to drive it. Output only Rust code wrapped in ```rust code blocks.

code:
use thiserror::Error;
use std::io;

#[derive(Debug, Error, Display)]
pub enum MyError {
    #[error("I/O error: {0}")]
    Io(#[from] io::Error),
    #[error("Something went wrong: {0}")]
    Something(#[from] Box<dyn std::error::Error + Send + Sync>),
}

#[tokio::main]
async fn main() -> Result<(), MyError> {
    let result = std::fs::read_to_string("non-existent-file.txt")?;
    println!("File contents: {}", result);

    Ok(())
}

compile_error:
error[E0433]: failed to resolve: use of undeclared crate or module `tokio`
  --> src/main.rs:12:3
   |
12 | #[tokio::main]
   |   ^^^^^ use of undeclared crate or module `tokio`

error: cannot find derive macro `Display` in this scope
 --> src/main.rs:4:24
  |
4 | #[derive(Debug, Error, Display)]
  |                        ^^^^^^^

error[E0752]: `main` function is not allowed to be `async`
  --> src/main.rs:13:1
   |
13 | async fn main() -> Result<(), MyError> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `main` function is not allowed to be `async`

Some errors have detailed explanations: E0433, E0752.
For more information about an error, try `rustc --explain E0433`.
error: could not compile `template_app` (bin "template_app") due to 3 previous errors


prompt: Write a Rust program that uses the rand crate to generate random numbers and select random items from a vector. Include `fn main()`. Output only Rust code in ```rust code blocks.

code:
use rand::Rng;
use rand::distributions::Alphanumeric;
use rand::prelude::*;

fn main() {
    let mut rng = thread_rng();

    let mut random_alphanumeric = String::new();
    let mut random_int = 0;

    let mut v = vec!["apple", "banana", "cherry", "date", "elderberry"];

    for _ in 0..10 {
        random_alphanumeric = String::from_utf8(vec![rng.sample(Alphanumeric)].into_iter().collect())
           .unwrap()
           .to_string();

        random_int = rng.gen_range(0, v.len());

compile_error:
error[E0277]: the trait bound `{integer}: SampleRange<_>` is not satisfied
   --> src/main.rs:18:36
    |
18  |         random_int = rng.gen_range(0, v.len());
    |                          --------- ^ the trait `SampleRange<_>` is not implemented for `{integer}`
    |                          |
    |                          required by a bound introduced by this call
    |
    = help: the following other types implement trait `SampleRange<T>`:
              RangeInclusive<T>
              std::ops::Range<T>
note: required by a bound in `gen_range`
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/rand-0.8.5/src/rng.rs:132:12
    |
129 |     fn gen_range<T, R>(&mut self, range: R) -> T
    |        --------- required by a bound in this associated function
...
132 |         R: SampleRange<T>
    |            ^^^^^^^^^^^^^^ required by this bound in `Rng::gen_range`

error[E0061]: this method takes 1 argument but 2 arguments were supplied
   --> src/main.rs:18:26


prompt: Write only Rust code for a program that uses iterators with map/filter to compute a sum. Include `fn main()` and necessary imports. No explanations. Wrap code in ```rust code blocks.

code:
use std::env;
use std::process;

fn main() {
    let args: Vec<String> = env::args().collect();
    let args: Vec<i32> = args.iter()
       .skip(1)
       .map(|arg| arg.parse().unwrap_or_else(|_| panic!("Invalid argument")))
       .collect();

    let sum = args.iter().filter(|&&x| x > 0).sum::<i32>();

    match sum {
        Some(s) => println!("{}", s),
        None => println!("Sum is 0"),
    }
}

compile_error:
warning: unused import: `std::process`
 --> src/main.rs:2:5
  |
2 | use std::process;
  |     ^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

error[E0308]: mismatched types
  --> src/main.rs:14:9
   |
13 |     match sum {
   |           --- this expression has type `i32`
14 |         Some(s) => println!("{}", s),
   |         ^^^^^^^ expected `i32`, found `Option<_>`
   |
   = note: expected type `i32`
              found enum `Option<_>`

error[E0308]: mismatched types
  --> src/main.rs:15:9
   |
13 |     match sum {
   |           --- this expression has type `i32`
14 |         Some(s) => println!("{}", s),
15 |         None => println!("Sum is 0"),
   |         ^^^^ expected `i32`, found `Option<_>`
   |
   = note: expected type `i32`
              found enum `Option<_>`

For more information about this error, try `rustc --explain E0308`.
error: could not compile `template_app` (bin "template_app") due to 2 previous errors; 1 warning emitted


prompt: Create a small example showing a thiserror enum, Display, a source cause, and a function using the ? operator. Include `fn main()` to drive it. Output only Rust code wrapped in ```rust code blocks.

code:
use thiserror::Error;

#[derive(Debug, Error, Display)]
pub enum MyError {
    #[error("error 1")]
    Error1,
    #[error("error 2")]
    Error2(#[source] Box<dyn Error>),
    #[error("error 3")]
    Error3(String),
}

fn divide(a: i32, b: i32) -> Result<i32, MyError> {
    if b == 0 {
        return Err(MyError::Error1);
    }
    Ok(a / b)
}

fn main() {
    match divide(5, 2) {
        Ok(x) => println!("Result is: {}", x),
        Err(e) => println!("Error: {}", e),
    }
}

compile_error:
error: cannot find derive macro `Display` in this scope
 --> src/main.rs:3:24
  |
3 | #[derive(Debug, Error, Display)]
  |                        ^^^^^^^

error[E0404]: expected trait, found derive macro `Error`
 --> src/main.rs:8:30
  |
8 |     Error2(#[source] Box<dyn Error>),
  |                              ^^^^^ not a trait
  |
help: consider importing one of these traits instead
  |
1 + use std::error::Error;
  |
1 + use serde::de::Error;
  |
1 + use serde::ser::Error;
  |

For more information about this error, try `rustc --explain E0404`.
error: could not compile `template_app` (bin "template_app") due to 2 previous errors


prompt: Write a Rust program that uses serde to serialize and deserialize a struct to JSON. Include `fn main()` and use serde_json. Output only Rust code in ```rust code blocks.

code:
use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
struct Person {
    first_name: String,
    last_name: String,
    age: u8,
}

fn main() {
    let person = Person {
        first_name: "John".to_string(),
        last_name: "Doe".to_string(),
        age: 30,
    };

    let serialized = serde_json::to_string(&person).unwrap();
    println!("Serialized: {}", serialized);

    let deserialized: Person = serde_json::from_str(&serialized).unwrap();
    println!("Deserialized

compile_error:
error[E0277]: `Person` doesn't implement `Debug`
  --> src/main.rs:21:36
   |
21 |     println!("Deserialized: {:?}", deserialized);
   |                                    ^^^^^^^^^^^^ `Person` cannot be formatted using `{:?}`
   |
   = help: the trait `Debug` is not implemented for `Person`
   = note: add `#[derive(Debug)]` to `Person` or manually `impl Debug for Person`
   = 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)
help: consider annotating `Person` with `#[derive(Debug)]`
   |
4  + #[derive(Debug)]
5  | struct Person {
   |

For more information about this error, try `rustc --explain E0277`.
error: could not compile `template_app` (bin "template_app") due to 1 previous error


prompt: Define a newtype wrapper for [u8; 32] and implement FromStr and Display. Provide a small `fn main()` that parses and prints it. Output only Rust code in ```rust code blocks.

code:
use std::fmt;

struct U32Bytes([u8; 32]);

impl FromStr for U32Bytes {
    type Err = std::num::ParseIntError;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let mut bytes = [0u8; 32];
        let len = s.len();
        if len > 32 {
            return Err(std::num::ParseIntError);
        }
        for (i, c) in s.bytes().enumerate() {
            if c < b'0' || c > b'9' {
                return Err(std::num::ParseIntError);
            }
            bytes[i] = c - b'0';

compile_error:
error[E0405]: cannot find trait `FromStr` in this scope
 --> src/main.rs:5:6
  |
5 | impl FromStr for U32Bytes {
  |      ^^^^^^^ not found in this scope
  |
help: consider importing this trait
  |
1 + use std::str::FromStr;
  |

error[E0423]: expected value, found struct `std::num::ParseIntError`
  --> src/main.rs:11:24
   |
11 |             return Err(std::num::ParseIntError);
   |                        ^^^^^^^^^^^^^^^^^^^^^^^
  --> /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/num/error.rs:66:1
   |
   = note: `std::num::ParseIntError` defined here

error[E0423]: expected value, found struct `std::num::ParseIntError`
  --> src/main.rs:15:28
   |
15 |                 return Err(std::num::ParseIntError);
   |                            ^^^^^^^^^^^^^^^^^^^^^^^
  --> /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/num/error.rs:66:1
   |
   = note: `std::num::ParseIntError` defined here

Some errors have detailed explanations: E0405, E0423.
For more i