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#![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)
}
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