[issue2007] nslookup with IPv6: assertion failed in mem.c

New submission from Stephane Russell <[e-mail]>:

System: DragonFly 2.8-RELEASE v2.8.2.42.g0f5d3-RELEASE i386

I enabled an IPv6 tunneling on my server. Everything went fine, except that
reverse lookups with nslookup sends a core dump. I noticed that the first run is
ok, the dumps starts on the second run.

$ nslookup ::1
Server:         127.0.0.1
Address:        127.0.0.1#53

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa      
name = localhost.example.com.

$ nslookup ::1
Server:         127.0.0.1
Address:        127.0.0.1#53

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa      
name = localhost.example.com.

mem.c:818: INSIST(((unsigned char *)mem)[size] == 0xbe) failed, back trace
#0 0x28366f4d in ??
#1 0x283670e9 in ??
#2 0x28374b56 in ??
#3 0x283753ed in ??
#4 0x281157ab in ??
#5 0x283ab4c8 in ??
#6 0x283ad35f in ??
#7 0x283a8ebf in ??
#8 0x0 in ??
Abandon(core dumped)

----------
messages: 9664
nosy: srussell
priority: bug
status: unread
title: nslookup with IPv6: assertion failed in mem.c

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