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