[dns-operations] tcpdump question

[Paul Vixie]

one of these things is not like the other.

# tcpdump -n "host ( 2001:4f8:3:bb::1 or 2001:500::1035 ) and \
	udp[10] & 0x2 = 0 and udp[11] & 0xf = 0"
tcpdump: expression rejects all packets

# tcpdump -n "host ( 192.5.5.241 or 204.152.187.1 ) and \
	udp[10] & 0x2 = 0 and udp[11] & 0xf = 0"
...works fine...

any ideas?  if i turn off the optimizer (tcpdump -O) the error goes away
but in fact the expression does reject all packets anyway.