1 error: Undefined Behavior: not granting access to tag <TAG> because incompatible item is protected: [SharedReadOnly for <TAG> (call ID)]
2 --> $DIR/aliasing_mut4.rs:LL:CC
4 LL | pub fn safe(_x: &i32, _y: &mut Cell<i32>) {}
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not granting access to tag <TAG> because incompatible item is protected: [SharedReadOnly for <TAG> (call ID)]
7 = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
8 = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
9 help: <TAG> was created by a retag at offsets [0x0..0x4]
10 --> $DIR/aliasing_mut4.rs:LL:CC
12 LL | let xref = &mut x;
14 help: <TAG> was protected due to <TAG> which was created here
15 --> $DIR/aliasing_mut4.rs:LL:CC
17 LL | safe_raw(xshr, xraw as *mut _);
19 help: this protector is live for this call
20 --> $DIR/aliasing_mut4.rs:LL:CC
22 LL | pub fn safe(_x: &i32, _y: &mut Cell<i32>) {}
23 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
24 = note: inside `safe` at $DIR/aliasing_mut4.rs:LL:CC
25 note: inside `main` at $DIR/aliasing_mut4.rs:LL:CC
26 --> $DIR/aliasing_mut4.rs:LL:CC
28 LL | safe_raw(xshr, xraw as *mut _);
29 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
31 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
33 error: aborting due to previous error