error: Undefined Behavior: attempting a write access using <TAG> at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
  --> $DIR/transmute-is-no-escape.rs:LL:CC
   |
LL |     unsafe { *raw = 13 };
   |              ^^^^^^^^^
   |              |
   |              attempting a write access using <TAG> at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
   |              this error occurs as part of an access at ALLOC[0x0..0x4]
   |
   = 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 [0x4..0x8]
  --> $DIR/transmute-is-no-escape.rs:LL:CC
   |
LL |     let raw = (&mut x[1] as *mut i32).wrapping_offset(-1);
   |                ^^^^^^^^^
   = note: BACKTRACE:
   = note: inside `main` at $DIR/transmute-is-no-escape.rs:LL:CC

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

error: aborting due to previous error