2 fn takes_ref(_: &Foo) {}
5 let ref opt = Some(Foo);
6 opt.map(|arg| takes_ref(arg));
7 //~^ ERROR mismatched types [E0308]
8 opt.and_then(|arg| Some(takes_ref(arg)));
9 //~^ ERROR mismatched types [E0308]
10 let ref opt: Result<_, ()> = Ok(Foo);
11 opt.map(|arg| takes_ref(arg));
12 //~^ ERROR mismatched types [E0308]
13 opt.and_then(|arg| Ok(takes_ref(arg)));
14 //~^ ERROR mismatched types [E0308]