| error: Undefined Behavior: attempting a write access using <TAG> at ALLOC[OFFSET], but that tag does not exist in the borrow stack for this location |
| --> tests/fail/async-shared-mutable.rs:LL:CC |
| | |
| LL | *x = 1; |
| | ^^^^^^ this error occurs as part of an access at ALLOC[OFFSET] |
| | |
| = 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 Unique retag at offsets [OFFSET] |
| --> tests/fail/async-shared-mutable.rs:LL:CC |
| | |
| LL | / core::future::poll_fn(move |_| { |
| LL | | *x = 1; |
| LL | | Poll::<()>::Pending |
| LL | | }) |
| LL | | .await |
| | |______________^ |
| help: <TAG> was later invalidated at offsets [OFFSET] by a SharedReadOnly retag |
| --> tests/fail/async-shared-mutable.rs:LL:CC |
| | |
| LL | let _: Pin<&_> = f.as_ref(); // Or: `f.as_mut().into_ref()`. |
| | ^^^^^^^^^^ |
| = note: BACKTRACE (of the first span): |
| = note: inside closure at tests/fail/async-shared-mutable.rs:LL:CC |
| = note: inside `<std::future::PollFn<{closure@tests/fail/async-shared-mutable.rs:LL:CC}> as std::future::Future>::poll` at RUSTLIB/core/src/future/poll_fn.rs:LL:CC |
| note: inside closure |
| --> tests/fail/async-shared-mutable.rs:LL:CC |
| | |
| LL | .await |
| | ^^^^^ |
| note: inside `main` |
| --> tests/fail/async-shared-mutable.rs:LL:CC |
| | |
| LL | assert_eq!(f.as_mut().poll(&mut cx), Poll::Pending); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace |
| |
| error: aborting due to 1 previous error |
| |
