bpo-18060: Updating _fields_ of a derived struct type yields a bad cif #13374
+112
−8
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Use the size of the fields elements array in the parent class of a Srtructure or Union derived subclass when cloning or modifying the fields array. The old behavior of using the number of elements in the parent class can cause the array to be truncated when it is copied, especially when there are multiple layers of subclassing, which can result in segfaults or exceptions. Tests are included.
https://bugs.python.org/issue18060