matchCurrentInput(
		const InString *input, int pos, const widechar *passInstructions, int passIC) {
	int k;
	int kk = pos;
	for (k = passIC + 2; k < passIC + 2 + passInstructions[passIC + 1]; k++)
		if (input->chars[kk] == ENDSEGMENT || passInstructions[k] != input->chars[kk++])
			return 0;
	return 1;
}
The software reads data past the end, or before the beginning, of the intended buffer.