Rollup merge of #71140 - oli-obk:static_cycle, r=RalfJung

[breaking change] Disallow statics initializing themselves

fixes #71078

Self-initialization is unsound because it breaks privacy assumptions that unsafe code can make. In

```rust
pub mod foo {
    #[derive(Debug, Copy, Clone)]
    pub struct Foo {
        x: (),
    }
}

pub static FOO: foo::Foo = FOO;
```

unsafe could could expect that ony functions inside the `foo` module were able to create a value of type `Foo`.

0 files changed, 0 insertions, 0 deletions