1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
#![feature(rustc_attrs)]
#![allow(dead_code)]
fn main() { #![rustc_error] // rust-lang/rust#49855
// Original borrow ends at end of function
let mut x = 1;
let y = &mut x;
//~^ mutable borrow occurs here
let z = &x; //~ ERROR cannot borrow
//~^ immutable borrow occurs here
z.use_ref();
y.use_mut();
}
fn foo() {
match true {
true => {
// Original borrow ends at end of match arm
let mut x = 1;
let y = &x;
//~^ immutable borrow occurs here
let z = &mut x; //~ ERROR cannot borrow
//~^ mutable borrow occurs here
z.use_mut();
y.use_ref();
}
false => ()
}
}
fn bar() {
// Original borrow ends at end of closure
|| {
let mut x = 1;
let y = &mut x;
//~^ first mutable borrow occurs here
let z = &mut x; //~ ERROR cannot borrow
//~^ second mutable borrow occurs here
z.use_mut();
y.use_mut();
};
}
trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }
impl<T> Fake for T { }
|
