Sam Gross 0559339ccd gh-130019: Fix data race in _PyType_AllocNoTrack (gh-130058) ...

The reference count fields, such as `ob_tid` and `ob_ref_shared`, may be
accessed concurrently in the free threading build by a `_Py_TryXGetRef`
or similar operation. The PyObject header fields will be initialized by
`_PyObject_Init`, so only call `memset()` to zero-initialize the remainder
of the allocation.

2025-02-13 11:50:45 -05:00

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