Co-authored-by: Oli Scherer <github35764891676564198441@oli-obk.de>

```
error[E0204]: the trait `Copy` may not be implemented for this type
  --> f42.rs:9:17
   |
9  | #[derive(Debug, Copy, Clone)]
   |                 ^^^^
10 | pub struct AABB<K>{
11 |     pub loc: Vector2<K>,
   |     ------------------- this field does not implement `Copy`
12 |     pub size: Vector2<K>
   |     -------------------- this field does not implement `Copy`
   |
note: the `Copy` impl for `Vector2<K>` requires that `K: Debug`
  --> f42.rs:11:5
   |
11 |     pub loc: Vector2<K>,
   |     ^^^^^^^^^^^^^^^^^^^
note: the `Copy` impl for `Vector2<K>` requires that `K: Debug`
  --> f42.rs:12:5
   |
12 |     pub size: Vector2<K>
   |     ^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `K`
   |
10 | pub struct AABB<K: Debug>{
   |                  +++++++
```

Fix rust-lang#89137.

…from_ref, r=dtolnay

Stabilize `{slice,array}::from_ref`

This PR stabilizes the following APIs as `const` functions in Rust `1.63`:
```rust
// core::array
pub const fn from_ref<T>(s: &T) -> &[T; 1];

// core::slice
pub const fn from_ref<T>(s: &T) -> &[T];
```

Note that the `mut` versions are not stabilized as unique references (`&mut _`) are [unstable in const context].

FCP: rust-lang#90206 (comment)

r? rust-lang/libs-api `@rustbot` label +T-libs-api -T-libs

[unstable in const context]: rust-lang#57349

add cast kind of from_exposed_addr (int-to-ptr casts)

This is basically the dual to rust-lang#97582, for int2ptr casts.

Cc `@tmiasko` rust-lang#97649

…-obk

take back half-baked noaliasing check in Assignment

Doing an aliasing check in `copy_op` does not make a ton of sense. We have to eventually do something in the `Assignment` statement handling instead.

… r=compiler-errors

On E0204 suggest missing type param bounds

```
error[E0204]: the trait `Copy` may not be implemented for this type
  --> f42.rs:9:17
   |
9  | #[derive(Debug, Copy, Clone)]
   |                 ^^^^
10 | pub struct AABB<K>{
11 |     pub loc: Vector2<K>,
   |     ------------------- this field does not implement `Copy`
12 |     pub size: Vector2<K>
   |     -------------------- this field does not implement `Copy`
   |
note: the `Copy` impl for `Vector2<K>` requires that `K: Debug`
  --> f42.rs:11:5
   |
11 |     pub loc: Vector2<K>,
   |     ^^^^^^^^^^^^^^^^^^^
note: the `Copy` impl for `Vector2<K>` requires that `K: Debug`
  --> f42.rs:12:5
   |
12 |     pub size: Vector2<K>
   |     ^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `K`
   |
10 | pub struct AABB<K: Debug>{
   |                  +++++++
```

Fix rust-lang#89137.

rustdoc: clean up primitive.slice.html links

Before: <a href="https://doc.rust-lang.org/stable/std/boxed/struct.Box.html">Box</a>&lt;<a href="https://doc.rust-lang.org/stable/std/primitive.slice.html">[</a>T<a href="https://doc.rust-lang.org/stable/std/primitive.slice.html">]</a>&gt;

After: <a href="https://doc.rust-lang.org/stable/std/boxed/struct.Box.html">Box</a>&lt;<a href="https://doc.rust-lang.org/stable/std/primitive.slice.html">[T]</a>&gt;