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pythongh-111178: fix UBSan failures in Modules/_ctypes (python#129071)
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This fixes UBSan failures for the following objects:

- `DictRemoverObject` and `StructParamObject`,
- `CDataObject` and `CFieldObject`, and
- `PyCFuncPtrObject` and `PyCArgObject`.

On the default build, we convert the `LOCK_PTR` and `UNLOCK_PTR` macros to
functions with an unused parameter to ease "unused variable" compiler warnings
suppression. Finally, we also remove some redundant casts to `PyObject *`.
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@picnixz
picnixz authored Jan 21, 2025
1 parent 36f341c commit fafc618
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