Function keys F1-F5 not detected on Linux console

Created by: ziotom78

The following snippet (modified version of https://github.com/ticki/termion/blob/master/examples/keys.rs) fails to detect function keys F1-F5 when run on a Linux text console (tty, enabled using Ctrl+Alt+F1):

extern crate termion;

use termion::event::Key;
use termion::input::TermRead;
use termion::raw::IntoRawMode;
use std::io::{Write, stdout, stdin};

fn main() {
    let stdin = stdin();
    let mut stdout = stdout().into_raw_mode().unwrap();

    write!(stdout,
           "{}{}q to exit. Type stuff, use alt, and so on.{}",
           termion::clear::All,
           termion::cursor::Goto(1, 1),
           termion::cursor::Hide)
        .unwrap();
    stdout.flush().unwrap();

    for c in stdin.keys() {
        write!(stdout,
               "{}{}",
               termion::cursor::Goto(1, 1),
               termion::clear::CurrentLine)
            .unwrap();

        match c.unwrap() {
            Key::Char('q') => break,
            Key::F(n) => println!("F{}", n),
            _ => {}
        }
        stdout.flush().unwrap();
    }

    write!(stdout, "{}", termion::cursor::Show).unwrap();
}

Specifically:

• F1 is reported as key A
• F2 is reported as key B
• F3 is reported as key C
• F4 is reported as key D
• F5 is reported as key E

Function keys F6-F12 work fine. I think this is caused by a different definition of the control sequences for $TERM==xterm and $TERM==linux (this case):

$ infocmp xterm linux | grep "kf[1-9]:"
        kf1: '\EOP', '\E[[A'.
        kf2: '\EOQ', '\E[[B'.
        kf3: '\EOR', '\E[[C'.
        kf4: '\EOS', '\E[[D'.
        kf5: '\E[15~', '\E[[E'.

As you can see, only F1-F5 differ, and the last letter is indeed what termion reports.

My system is a Linux Mint 18 Sarah KDE edition (64bit).