lifetimes are hard :(

lib.rs

#[macro_use]
extern crate lazy_static;

use std::fs::File;
use std::io::prelude::*;
use std::collections::HashSet;
use std::iter::FromIterator;

lazy_static! {
    static ref PASSWORDS: HashSet<&'static str> = {
        let mut f = File::open("common-passwords.txt")
            .expect("There was a problem opening the list of passwords");
        let mut file_contents = String::new();

        f.read_to_string(&mut file_contents)
            .expect("There was a problem reading the common passwords file");

        HashSet::from_iter(file_contents.lines())
    };
}

Error output

error: `file_contents` does not live long enough
  --> src/lib.rs:18:28
   |
18 |         HashSet::from_iter(file_contents.lines())
   |                            ^^^^^^^^^^^^^ does not live long enough
19 |     };
   |     - borrowed value only lives until here
   |
   = note: borrowed value must be valid for the static lifetime...