fn main() {
    let mut x = 0;
    let mut mut_ptr = &mut x as *mut i32;
    let mut mut_ref_a = unsafe { std::mem::transmute::<*mut i32, &'static mut i32>(mut_ptr) };
    let mut mut_ref_b = unsafe { std::mem::transmute::<*mut i32, &'static mut i32>(mut_ptr) };
}