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// run-pass
#![allow(dead_code)]
#![allow(non_camel_case_types)]
// pretty-expanded FIXME #23616
#![feature(allocator_api)]
use std::alloc::{handle_alloc_error, Allocator, Global, Layout};
use std::ptr::NonNull;
struct arena(());
struct Bcx<'a> {
fcx: &'a Fcx<'a>,
}
struct Fcx<'a> {
arena: &'a arena,
ccx: &'a Ccx,
}
struct Ccx {
x: isize,
}
fn allocate(_bcx: &arena) -> &mut Bcx<'_> {
unsafe {
let layout = Layout::new::<Bcx>();
let ptr = Global.allocate(layout).unwrap_or_else(|_| handle_alloc_error(layout));
&mut *ptr.as_ptr().cast()
}
}
fn h<'a>(bcx: &'a Bcx<'a>) -> &'a mut Bcx<'a> {
return allocate(bcx.fcx.arena);
}
fn g(fcx: &Fcx) {
let bcx = Bcx { fcx };
let bcx2 = h(&bcx);
unsafe {
Global.deallocate(NonNull::new_unchecked(bcx2 as *mut _ as *mut _), Layout::new::<Bcx>());
}
}
fn f(ccx: &Ccx) {
let a = arena(());
let fcx = Fcx { arena: &a, ccx };
return g(&fcx);
}
pub fn main() {
let ccx = Ccx { x: 0 };
f(&ccx);
}
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