| //@revisions: stack tree |
| //@[tree]compile-flags: -Zmiri-tree-borrows |
| use std::mem; |
| |
| fn safe(x: &mut i32, y: &mut i32) { |
| //~[stack]^ ERROR: protect |
| *x = 1; //~[tree] ERROR: /write access through .* is forbidden/ |
| *y = 2; |
| } |
| |
| fn main() { |
| let mut x = 0; |
| let xraw: *mut i32 = unsafe { mem::transmute(&mut x) }; |
| // We need to apply some tricky to be able to call `safe` with two mutable references |
| // with the same tag: We transmute both the fn ptr (to take raw ptrs) and the argument |
| // (to be raw, but still have the unique tag). |
| let safe_raw: fn(x: *mut i32, y: *mut i32) = |
| unsafe { mem::transmute::<fn(&mut i32, &mut i32), _>(safe) }; |
| safe_raw(xraw, xraw); |
| } |
