src/test/ui/consts/intrinsic_without_const_stab_fail.rs

#![feature(intrinsics, staged_api, const_intrinsic_copy)]
#![stable(feature = "core", since = "1.6.0")]

extern "rust-intrinsic" {
    fn copy<T>(src: *const T, dst: *mut T, count: usize);
}

#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_intrinsic_copy", issue = "80697")]
#[inline]
pub const unsafe fn stuff<T>(src: *const T, dst: *mut T, count: usize) {
    unsafe { copy(src, dst, count) } //~ ERROR calls in constant functions are limited
}

fn main() {}