FP missing-const-for-fn: `the destructor for this type cannot be evaluated in constant functions

Summary

.

Reproducer

I tried this code:

use std::cell::Cell;

const NONE_CELL_STRING: Option<Cell<String>> = None;

fn a() { // clippy suggests this to be const
    let _: &'static Option<Cell<String>> = &NONE_CELL_STRING;
}

I expected to see this happen:

Instead, this happened:

error[E0493]: destructor of `std::option::Option<std::cell::Cell<std::string::String>>` cannot be evaluated at compile-time
 --> a.rs:6:45
  |
6 |     let _: &'static Option<Cell<String>> = &NONE_CELL_STRING;
  |                                             ^^^^^^^^^^^^^^^^ the destructor for this type cannot be evaluated in constant functions
7 | }
  | - value is dropped here

Version

rustc 1.81.0-nightly (9c3bc805d 2024-06-27)
binary: rustc
commit-hash: 9c3bc805dd9cb84019c124b9a50fdff1e62a7ec9
commit-date: 2024-06-27
host: x86_64-unknown-linux-gnu
release: 1.81.0-nightly
LLVM version: 18.1.7

Additional Labels

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