tests/fail/both_borrows/box_noalias_violation.stack.stderr

error: Undefined Behavior: not granting access to tag <TAG> because that would remove [Unique for <TAG>] which is weakly protected
  --> tests/fail/both_borrows/box_noalias_violation.rs:LL:CC
   |
LL |     *y
   |     ^^ Undefined Behavior occurred here
   |
   = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
   = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
help: <TAG> was created by a SharedReadWrite retag at offsets [0x0..0x4]
  --> tests/fail/both_borrows/box_noalias_violation.rs:LL:CC
   |
LL |         let ptr = &mut v as *mut i32;
   |                   ^^^^^^
help: <TAG> is this argument
  --> tests/fail/both_borrows/box_noalias_violation.rs:LL:CC
   |
LL | unsafe fn test(mut x: Box<i32>, y: *const i32) -> i32 {
   |                ^^^^^
   = note: stack backtrace:
           0: test
               at tests/fail/both_borrows/box_noalias_violation.rs:LL:CC
           1: main
               at tests/fail/both_borrows/box_noalias_violation.rs:LL:CC

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to 1 previous error