summaryrefslogtreecommitdiffstats
path: root/tests/ui/box/leak-alloc.rs
blob: 3f0f39f448b91887d652634bb8f055f60623d7ba (plain)
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
#![feature(allocator_api)]

use std::alloc::{AllocError, Allocator, Layout, System};
use std::ptr::NonNull;

use std::boxed::Box;

struct Alloc {}

unsafe impl Allocator for Alloc {
    fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
        System.allocate(layout)
    }

    unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout) {
        System.deallocate(ptr, layout)
    }
}

fn use_value(_: u32) {}

fn main() {
    let alloc = Alloc {};
    let boxed = Box::new_in(10, alloc.by_ref());
    let theref = Box::leak(boxed);
    drop(alloc);
    //~^ ERROR cannot move out of `alloc` because it is borrowed
    use_value(*theref)
}