`&raw const` can sometimes do temporary lifetime extension

I'm not sure if this is a bug or not.

struct LoudDrop;

impl Drop for LoudDrop {
    fn drop(&mut self) {
        println!("drop");
    }
}

fn main() {
    let _ptr = &raw const Box::new((LoudDrop,)).0;
    println!("after let");
}

This code compiles, and prints after let, then prints drop. This contradicts the following comment in the compiler, which says that the above code creates an immediately-dangling pointer: https://github.com/rust-lang/rust/blob/4eedad312695d773b6e2e17a4f8082660470c101/compiler/rustc_hir_typeck/src/expr.rs#L735-L737

@rustbot labels +T-lang +T-compiler +A-raw-pointers

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Reproducible on the playground with version 1.91.0-nightly (2025-08-23 69b76df90c7ea63b5350)

Reproduce the example on the Rust Playground using the reported nightly version and inspect the comment in compiler/rustc_hir_typeck/src/expr.rs around lines 735-737. Determine whether the temporary lifetime behavior or the compiler comment is incorrect, then align the relevant compiler behavior or documentation and add coverage for the example.