rust/tests/fail/stacked_borrows/pass_invalid_mut.stderr

error: Undefined Behavior: trying to reborrow from <TAG> for SharedReadWrite permission at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
  --> $DIR/pass_invalid_mut.rs:LL:CC
   |
LL |     foo(xref);
   |         ^^^^
   |         |
   |         trying to reborrow from <TAG> for SharedReadWrite permission at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
   |         this error occurs as part of a reborrow 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 retag at offsets [0x0..0x4]
  --> $DIR/pass_invalid_mut.rs:LL:CC
   |
LL |     let xref = unsafe { &mut *xraw };
   |                         ^^^^^^^^^^
help: <TAG> was later invalidated at offsets [0x0..0x4]
  --> $DIR/pass_invalid_mut.rs:LL:CC
   |
LL |     let _val = unsafe { *xraw }; // invalidate xref
   |                         ^^^^^
   = note: backtrace:
   = note: inside `main` at $DIR/pass_invalid_mut.rs:LL:CC

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

error: aborting due to previous error