#![feature(core_intrinsics)] #![feature(const_heap)] #![feature(const_mut_refs)] use std::intrinsics; const _X: &'static u8 = unsafe { let ptr = intrinsics::const_allocate(4, 4); intrinsics::const_deallocate(ptr, 4, 4); &*ptr //~^ error: evaluation of constant value failed }; const _Y: u8 = unsafe { let ptr = intrinsics::const_allocate(4, 4); let reference = &*ptr; intrinsics::const_deallocate(ptr, 4, 4); *reference //~^ error: evaluation of constant value failed }; fn main() {}