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
|
//@ run-pass
#![deny(unused_mut)]
#![allow(unused_must_use)]
// Test that mutating a mutable upvar in a capture-by-value unboxed
// closure does not ice (issue #18238) and marks the upvar as used
// mutably so we do not get a spurious warning about it not needing to
// be declared mutable (issue #18336 and #18769)
fn set(x: &mut usize) { *x = 42; }
fn main() {
{
let mut x = 0_usize;
move || x += 1; //~ WARN unused variable: `x`
}
{
let mut x = 0_usize;
move || x += 1; //~ WARN unused variable: `x`
}
{
let mut x = 0_usize;
move || set(&mut x);
}
{
let mut x = 0_usize;
move || set(&mut x);
}
}
|
