rust/tests/ui/consts/const-eval/heap/alloc_intrinsic_errors.rs

#![feature(core_intrinsics)]
#![feature(const_heap)]
use std::intrinsics;

const FOO: i32 = foo(); //~ error: evaluation of constant value failed
const fn foo() -> i32 {
    unsafe {
        let _ = intrinsics::const_allocate(4, 3) as *mut i32; //~ inside `foo`
    }
    1
}

fn main() {}