error: Undefined Behavior: Data race detected between (1) creating a new allocation on thread `unnamed-ID` and (2) non-atomic write on thread `unnamed-ID` at ALLOC
  --> tests/fail/data_race/alloc_write_race.rs:LL:CC
   |
LL | ...   *pointer.load(Ordering::Relaxed) = 2;
   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (2) just happened here
   |
help: and (1) occurred earlier here
  --> tests/fail/data_race/alloc_write_race.rs:LL:CC
   |
LL |                 .store(Box::into_raw(Box::<usize>::new_uninit()) as *mut usize, Ordering::Relaxed);
   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
   = 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
   = note: BACKTRACE (of the first span) on thread `unnamed-ID`:
   = note: inside closure at tests/fail/data_race/alloc_write_race.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