You are given a code snippet implementing the `Display` trait for a custom `Error` structure. Your task is to identify and fix the issue in the code.

The code snippet provided is missing the opening curly brace (`{`) for the `impl fmt::Display for Error` block. Without the opening brace, the code is invalid and will result in a compilation error.

Your task is to modify the code to fix this issue and make it valid.

[Test Input Reasoning]

No testing required for this problem.

```rust
// Test input code
None
```

[Test Output Reasoning]

No testing required for this problem.

```rust
// Test output code
None
```
user
Sure, I can help you with that. Here's what the corrected code should look like:

```rust
use std::fmt;

#[derive(Debug)]
pub enum Error {
    CustomError,
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Error::CustomError => write!(f, "Custom error occurred."),
        }
    }
}
```

In this corrected code, I have added the opening curly brace `{` after the trait `impl fmt::Display for Error {` to indicate the beginning of the block for the `impl` statement. This makes the code valid and compilable.
assistant
You are given a code snippet implementing the `Display` trait for a custom `Error` structure. Your task is to identify and fix the issue in the code.

The code snippet provided is missing the opening curly brace (`{`) for the `impl fmt::Display for Error` block. Without the opening brace, the code is invalid and will result in a compilation error.

Your task is to modify the code to fix this issue and make it valid.

[Test Input Reasoning]

No testing required for this problem.

```rust
// Test input code
None
```

[Test Output Reasoning]

No testing required for this problem.

```rust
// Test output code
None
```
user
Sure, I can help with that. The issue you've identified is correct. The code snippet is missing the opening curly brace (`{`) for the `impl fmt::Display for Error` block. Here's how you can fix it:

```rust
use std::fmt;

// Define your custom error type
struct Error;

// Implement the `Display` trait for your error type
impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "An error occurred")
    }
}
```

In this corrected code, the `impl fmt::Display for Error` block now correctly opens with a curly brace (`{`), and the `fmt` function is defined within this block. This should resolve the compilation error.
assistant