Code examples for decrypt gives type error

I tried creating an empty repository with the following code, directly from the example for decrypt

extern crate gpgme;
use std::fs::File;

use gpgme::{Context, Data, Protocol};
fn main(){
    let mut ctx = Context::from_protocol(Protocol::OpenPgp).unwrap();
    let mut cipher = Data::load("some file").unwrap();
    let mut plain = Vec::new();
    let mut input = File::open("some_file").unwrap();
    let mut output = Vec::new();

    ctx.decrypt(&mut input, &mut plain).unwrap();
}

This however gives me a type error:

error[E0308]: mismatched types
  --> main.rs:12:17
   |
12 |     ctx.decrypt(&mut input, &mut plain).unwrap();
   |                 ^^^^^^^^^^ expected struct `gpgme::Data`, found struct `std::fs::File`
   |
   = note: expected type `&mut gpgme::Data<'_>`
              found type `&mut std::fs::File`

error[E0308]: mismatched types
  --> main.rs:12:29
   |
12 |     ctx.decrypt(&mut input, &mut plain).unwrap();
   |                             ^^^^^^^^^^ expected struct `gpgme::Data`, found struct `std::vec::Vec`
   |
   = note: expected type `&mut gpgme::Data<'_>`
              found type `&mut std::vec::Vec<_>`
   = help: here are some functions which might fulfill your needs:
           - .remove(...)
           - .swap_remove(...)

error: aborting due to 2 previous errors

error: Could not compile `gpgtest`.

It works when I instantiate a gpgme::Data variable instead of a Vec. What I find quite strange is that the example in examples/decrypt.rs compiles just fine for me if I run cargo run --example decrypt.

gpg-rs / gpgme

Code examples for decrypt gives type error #5