1 error: Undefined Behavior: not granting access to tag <TAG> because that would remove [Unique for <TAG>] which is weakly protected because it is an argument of call ID
2 --> $DIR/box_noalias_violation.rs:LL:CC
5 | ^^ not granting access to tag <TAG> because that would remove [Unique for <TAG>] which is weakly protected because it is an argument of call ID
7 = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
8 = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
9 help: <TAG> was created by a SharedReadWrite retag at offsets [0x0..0x4]
10 --> $DIR/box_noalias_violation.rs:LL:CC
12 LL | let ptr = &mut v as *mut i32;
14 help: <TAG> is this argument
15 --> $DIR/box_noalias_violation.rs:LL:CC
17 LL | unsafe fn test(mut x: Box<i32>, y: *const i32) -> i32 {
20 = note: inside `test` at $DIR/box_noalias_violation.rs:LL:CC
22 --> $DIR/box_noalias_violation.rs:LL:CC
24 LL | test(Box::from_raw(ptr), ptr);
25 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
27 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
29 error: aborting due to previous error