Error Code Samples in Docs

[kosinix]

Example from here: https://doc.rust-lang.org/std/fs/struct.File.html

use std::io::prelude::*;
use std::fs::File;

let mut f = try!(File::create("foo.txt"));
try!(f.write_all(b"Hello, world!"));

let mut f = try!(File::open("foo.txt"));
let mut s = String::new();
try!(f.read_to_string(&mut s));
assert_eq!(s, "Hello, world!");

Compiling results to: error: mismatched types [E0308]
Funny because when running rustc --explain E0308 it tells me not to use try! with File:

rustc --explain E0308:

Another situation in which this occurs is when you attempt to use the `try!`                                               
macro inside a function that does not return a `Result<T, E>`:   

use std::fs::File;                                                                                                         

fn main() {                                                                                                                
    let mut f = try!(File::create("foo.txt"));                                                                             
}                                                                                                                          

[steveklabnik]

Funny because when running rustc --explain E0308 it tells me not to use try! with File:

This isn't what it's telling you: it's telling you that you can't use try! from within a function that doesn't return a Result, like main().

[steveklabnik]

Closing as "not a bug", thanks!