1 error: Undefined Behavior: attempting a write access using <TAG> at ALLOC[0x4], but that tag does not exist in the borrow stack for this location
2 --> $DIR/buggy_as_mut_slice.rs:LL:CC
7 | attempting a write access using <TAG> at ALLOC[0x4], but that tag does not exist in the borrow stack for this location
8 | this error occurs as part of an access at ALLOC[0x4..0x8]
10 = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
11 = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
12 help: <TAG> was created by a Unique retag at offsets [0x0..0xc]
13 --> $DIR/buggy_as_mut_slice.rs:LL:CC
15 LL | let v1 = safe::as_mut_slice(&v);
16 | ^^^^^^^^^^^^^^^^^^^^^^
17 help: <TAG> was later invalidated at offsets [0x0..0xc] by a Unique retag
18 --> $DIR/buggy_as_mut_slice.rs:LL:CC
20 LL | unsafe { from_raw_parts_mut(self_.as_ptr() as *mut T, self_.len()) }
21 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
23 = note: inside `main` at $DIR/buggy_as_mut_slice.rs:LL:CC
25 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
27 error: aborting due to previous error