error: Undefined Behavior: trying to retag from <54379001> for SharedReadWrite permission at alloc19481375[0x10], but that tag does not exist in the borrow stack for this location ##[error] --> /checkout/library/core/src/ptr/non_null.rs:375:18 | 375 | unsafe { &*self.as_ptr().cast_const() } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | | | trying to retag from <54379001> for SharedReadWrite permission at alloc19481375[0x10], but that tag does not exist in the borrow stack for this location | this error occurs as part of retag at alloc19481375[0x0..0x30] | = 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: <54379001> was created by a SharedReadWrite retag at offsets [0x0..0x29] --> /checkout/library/core/src/ptr/mod.rs:799:5 | 799 | r | ^ help: <54379001> was later invalidated at offsets [0x18..0x20] by a write access --> std/src/sys/sync/rwlock/queue.rs:396:13 | 396 | node.prev = AtomicLink::new(None); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ = note: BACKTRACE (of the first span) on thread `unnamed-995`: = note: inside `core::ptr::NonNull::<sys::sync::rwlock::queue::Node>::as_ref::<'_>` at /checkout/library/core/src/ptr/non_null.rs:375:18: 375:46 note: inside `sys::sync::rwlock::queue::find_tail_and_add_backlinks` --> std/src/sys/sync/rwlock/queue.rs:279:18 | 279 | next.as_ref().prev.set(Some(current)); | ^^^^^^^^ note: inside `sys::sync::rwlock::queue::RwLock::unlock_queue` --> std/src/sys/sync/rwlock/queue.rs:646:33 | 646 | let tail = unsafe { find_tail_and_add_backlinks(to_node(state)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ note: inside `sys::sync::rwlock::queue::RwLock::lock_contended` --> std/src/sys/sync/rwlock/queue.rs:437:21 | 437 | self.unlock_queue(next); | ^^^^^^^^^^^^^^^^^^^^^^^ note: inside `sys::sync::rwlock::queue::RwLock::write` --> std/src/sys/sync/rwlock/queue.rs:356:13 | 356 | self.lock_contended(true) | ^^^^^^^^^^^^^^^^^^^^^^^^^ note: inside `sync::rwlock::RwLock::<usize>::write` --> std/src/sync/rwlock.rs:362:13 | 362 | self.inner.write(); | ^^^^^^^^^^^^^^^^^^ note: inside closure --> std/src/sync/rwlock/tests.rs:533:46 | 533 | let mut write_guard = rw.write().unwrap(); | ^^^^^^^ note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace error: aborting due to 1 previous error �[1m�[31merror�[0m�[1m:�[0m test failed, to rerun pass `-p std --lib` Caused by: process didn't exit successfully: `/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/cargo-miri runner /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/miri/aarch64-apple-darwin/debug/deps/std-fa3c0a26ad940e73 'time::' 'sync::' 'thread::' 'env::' -Z unstable-options --format json` (exit status: 1) �[1m�[36mnote�[0m�[1m:�[0m test exited abnormally; to see the full output pass --nocapture to the harness.