bit_cmp(VarBit *arg1, VarBit *arg2)
{
	int			bitlen1,
				bytelen1,
				bitlen2,
				bytelen2;
	int32		cmp;

	bytelen1 = VARBITBYTES(arg1);
	bytelen2 = VARBITBYTES(arg2);

	cmp = memcmp(VARBITS(arg1), VARBITS(arg2), Min(bytelen1, bytelen2));
	if (cmp == 0)
	{
		bitlen1 = VARBITLEN(arg1);
		bitlen2 = VARBITLEN(arg2);
		if (bitlen1 != bitlen2)
			cmp = (bitlen1 < bitlen2) ? -1 : 1;
	}
	return cmp;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.