error: Undefined Behavior: memory access failed: ALLOC has been freed, so this pointer is dangling
  --> tests/fail/coroutine-pinned-moved.rs:LL:CC
   |
LL |         *num += 1;
   |         ^^^^^^^^^ Undefined Behavior occurred here
   |
   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
help: ALLOC was allocated here:
  --> tests/fail/coroutine-pinned-moved.rs:LL:CC
   |
LL |         let mut coroutine_iterator = Box::new(CoroutineIteratorAdapter(firstn()));
   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: ALLOC was deallocated here:
  --> tests/fail/coroutine-pinned-moved.rs:LL:CC
   |
LL |     }; // *deallocate* coroutine_iterator
   |     ^
   = note: BACKTRACE (of the first span):
   = note: inside closure at tests/fail/coroutine-pinned-moved.rs:LL:CC
note: inside `<CoroutineIteratorAdapter<{static coroutine@tests/fail/coroutine-pinned-moved.rs:LL:CC}> as std::iter::Iterator>::next`
  --> tests/fail/coroutine-pinned-moved.rs:LL:CC
   |
LL |         match me.resume(()) {
   |               ^^^^^^^^^^^^^
   = note: inside `std::boxed::iter::<impl std::iter::Iterator for std::boxed::Box<CoroutineIteratorAdapter<{static coroutine@tests/fail/coroutine-pinned-moved.rs:LL:CC}>>>::next` at RUSTLIB/alloc/src/boxed/iter.rs:LL:CC
note: inside `main`
  --> tests/fail/coroutine-pinned-moved.rs:LL:CC
   |
LL |     coroutine_iterator_2.next(); // and use moved value
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^

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

error: aborting due to 1 previous error