src/test/run-pass/borrowck/borrowck-unsafe-static-mutable-borrows.rs

// run-pass
// revisions: ast mir
//[mir]compile-flags: -Z borrowck=mir

// Test file taken from issue 45129 (https://github.com/rust-lang/rust/issues/45129)

struct Foo { x: [usize; 2] }

static mut SFOO: Foo = Foo { x: [23, 32] };

impl Foo {
    fn x(&mut self) -> &mut usize { &mut self.x[0] }
}

fn main() {
    unsafe {
        let sfoo: *mut Foo = &mut SFOO;
        let x = (*sfoo).x();
        (*sfoo).x[1] += 1;
        *x += 1;
    }
}