rust/tests/compile-fail/validation_aliasing_mut2.rs

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#![allow(unused_variables)]
mod safe {
pub fn safe(x: &i32, y: &mut i32) {} //~ ERROR: in conflict with lock ReadLock
}
fn main() {
let x = &mut 0 as *mut _;
unsafe { safe::safe(&*x, &mut *x) };
}