Mark Dickinson added the comment:
The relevant piece of code in the struct module looks like this:
static PyObject *
nu_bool(const char *p, const formatdef *f)
{
BOOL_TYPE x;
memcpy((char *)&x, p, sizeof x);
return PyBool_FromLong(x != 0);
}
Is it possible that BOOL_TYPE is a bitfield of length 1, and that clang is
somehow making use of that fact?
One thing I don't understand is that this shouldn't affect *standard* packing
and unpacking (as opposed to native), but I still see the problem for a format
of "<????". However, it's fine for ">????". Some debugging shows that we're
calling 'nu_bool' even for "<????", which is a bit odd.
----------
nosy: +mark.dickinson
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<http://bugs.python.org/issue22012>
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