Crash report
What happened?
The following code will cause an abort due to byte_size not matching the size of ctypes.c_byte, failing an assertion that byte_size == info->size.
import ctypes ctypes.CField(name="a", type=ctypes.c_byte, byte_size=2, byte_offset=2, index=1, _internal_use=True)
Abort message:
python: ./Modules/_ctypes/cfield.c:102: PyCField_new_impl: Assertion `byte_size == info->size' failed.
Aborted (core dumped)
CPython versions tested on:
CPython main branch
Operating systems tested on:
Linux
Output from running 'python -VV' on the command line:
Python 3.14.0a6+ (heads/main:be2d2181e62, Mar 31 2025, 07:30:17) [GCC 11.4.0]