error: Undefined Behavior: memory access failed: ALLOC has been freed, so this pointer is dangling
  --> tests/fail/data_race/dealloc_write_race2.rs:LL:CC
   |
LL |             *ptr.0 = 2;
   |             ^^^^^^^^^^ 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/data_race/dealloc_write_race2.rs:LL:CC
   |
LL |     let pointer: *mut usize = Box::into_raw(Box::new(0usize));
   |                                             ^^^^^^^^^^^^^^^^
help: ALLOC was deallocated here:
  --> tests/fail/data_race/dealloc_write_race2.rs:LL:CC
   |
LL | /             __rust_dealloc(
LL | |                 ptr.0 as *mut _,
LL | |                 std::mem::size_of::<usize>(),
LL | |                 std::mem::align_of::<usize>(),
LL | |             );
   | |_____________^
   = note: BACKTRACE (of the first span) on thread `unnamed-ID`:
   = note: inside closure at tests/fail/data_race/dealloc_write_race2.rs:LL:CC

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

error: aborting due to 1 previous error