Bincode adds unexpected newline character to a file.

[ghost]

I have following struct

struct Employee {
    id: u64,
    name: String,
}

I am serializing it with following code and then writing serialized byte array in a file:

let emp = Employee {
        id: 1546,
        name: "abcd".to_string(),
    };

    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .create(true)
        .open("hello.txt")
        .unwrap();

    let initial_buf = &serialize(&emp).unwrap();

    println!("Initial Buf: {:?}", initial_buf);

    file.write(&serialize(&emp).unwrap());
    file.write(&[b'\n']);
    file.flush();

    file.seek(SeekFrom::Start(0)).unwrap();

    let mut final_buf: Vec<u8> = Vec::new();

    let mut reader = BufReader::new(file);

    reader.read_until(b'\n', &mut final_buf).unwrap();

    println!("Final Buf: {:?}", final_buf);

I get the following output:

Initial Buf: [10, 6, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 97, 98, 99, 100]
Final Buf: [10]

How can I add separators between different records in a file?

[dtolnay]

Cross-posted to Stack Overflow

[ghost]

Thanks @dtolnay
I wasn't aware that Rust community is so active on StackOverflow. That's the reason I posted at both places.