Hardware

umac

m86k MicroPython version

>>> descr = { 's': uctypes.INT32, 'c': uctypes.INT8 | 4 }
>>> uctypes.sizeof(descr)
8

However, the correct size is 6 bytes, because the alignment of INT32 is 2 bytes, not 4 bytes.

I think the uctypes assumption is that any object is aligned to its size. But this is not true in the m68k mac ABI.

Reproduction

use the above code

Expected behaviour

should print 6

Observed behaviour

prints 8

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree