I try to collect the directory from the user and then pass it to WalkDir to get all files inside, but it did not work. Same input was working when I hard code it. I was testing it on a Windows system.

This did not work, just return nothing.

let mut some_dir = String::new(); 

io::stdin()
    .read_line(&mut some_dir)
    .expect("Invalid Input");

some_dir = some_dir.replace("\", "\\"); 

for entry in WalkDir::new(&some_dir).into_iter().filter_map(|file| file.ok()) {
    println!("{}", entry.path().display());
}

This worked

for entry in WalkDir::new("<dir>").into_iter().filter_map(|file| file.ok()) {
    println!("{}", entry.path().display());
}

What is the reason behind and how to fix it?