| ────────────────────────────────────────────────── |
| Warning: this tree is indicative only. Some tags may have been hidden. |
| 0.. 1 |
| | Act | └─┬──<TAG=root of the allocation> |
| | RsM | └─┬──<TAG=base> |
| | RsM | ├─┬──<TAG=x> |
| | RsM | │ └─┬──<TAG=caller:x> |
| | RsM | │ └────<TAG=callee:x> Strongly protected |
| | RsM | └────<TAG=y, callee:y, caller:y> |
| ────────────────────────────────────────────────── |
| error: Undefined Behavior: write access through <TAG> (y, callee:y, caller:y) is forbidden |
| --> $DIR/cell-protected-write.rs:LL:CC |
| | |
| LL | *y = 1; |
| | ^^^^^^ write access through <TAG> (y, callee:y, caller:y) is forbidden |
| | |
| = help: this indicates a potential bug in the program: it performed an invalid operation, but the Tree Borrows rules it violated are still experimental |
| = help: the accessed tag <TAG> (y, callee:y, caller:y) is foreign to the protected tag <TAG> (callee:x) (i.e., it is not a child) |
| = help: this foreign write access would cause the protected tag <TAG> (callee:x) (currently Reserved (interior mutable)) to become Disabled |
| = help: protected tags must never be Disabled |
| help: the accessed tag <TAG> was created here |
| --> $DIR/cell-protected-write.rs:LL:CC |
| | |
| LL | let y = (&mut *n).get(); |
| | ^^^^^^^^^ |
| help: the protected tag <TAG> was created here, in the initial state Reserved (interior mutable) |
| --> $DIR/cell-protected-write.rs:LL:CC |
| | |
| LL | unsafe fn write_second(x: &mut UnsafeCell<u8>, y: *mut u8) { |
| | ^ |
| = note: BACKTRACE (of the first span): |
| = note: inside `main::write_second` at $DIR/cell-protected-write.rs:LL:CC |
| note: inside `main` |
| --> $DIR/cell-protected-write.rs:LL:CC |
| | |
| LL | write_second(x, y); |
| | ^^^^^^^^^^^^^^^^^^ |
| |
| note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace |
| |
| error: aborting due to previous error |
| |
