feature(const_ptr_write) is broken · Issue #86236 · rust-lang/rust (original) (raw)

As of a very recent nightly (rustc 1.54.0-nightly (0a8629bff 2021-06-11)), it appears to me that feature(const_ptr_write) is no longer working and broke my code. Sample code:

#![feature(const_ptr_write)]
const unsafe fn ex(x: *mut usize) {
    unsafe {
        x.write(0);
    }
}

error[E0015]: calls in constant functions are limited to constant functions, tuple structs and tuple variants
 --> src/lib.rs:5:9
  |
5 |         x.write(0);
  |         ^^^^^^^^^^

I see a tracking issue for many other pointer operations such as const_ptr_read, but strangely a tracking issue for const_ptr_write is missing.