(gdb) bt
#0  0x0000010001010000 in ?? ()
#1  0x00000000004a2232 in hash_lookup (vp=0x7fffffffdc88, table=0x7ffff7b8f010, key=0x7fffffffdc24, len=4, file=0x59cc30 "mdb.c", line=860) at hash.c:496
#2  0x000000000044110c in lease_ip_hash_lookup (ptr=0x7fffffffdc88, table=0x7ffff7b8f010, buf=0x7fffffffdc24 "\001(z\276", <incomplete sequence \342\213>, len=4, file=0x59cc30 "mdb.c", line=860) at mdb.c:2800
#3  0x000000000043f5af in find_lease_by_ip_addr (lp=0x7fffffffdc88, addr=..., file=0x59cc30 "mdb.c", line=860) at mdb.c:2005
#4  0x000000000043c8b9 in new_address_range (cfile=0x8b1cf0, low=..., high=..., subnet=0x8be280, pool=0x8be310, lpchain=0x0) at mdb.c:860
#5  0x000000000042110a in parse_address_range (cfile=0x8b1cf0, group=0x8be240, type=3, inpool=0x0, lpchain=0x0) at confpars.c:3770
#6  0x0000000000419649 in parse_statement (cfile=0x8b1cf0, group=0x8be240, type=3, host_decl=0x0, declaration=0) at confpars.c:619
#7  0x000000000041e155 in common_subnet_parsing (cfile=0x8b1cf0, share=0x8be1d0, subnet=0x8be280) at confpars.c:2578
#8  0x000000000041e655 in parse_subnet_declaration (cfile=0x8b1cf0, share=0x8be1d0) at confpars.c:2692
#9  0x0000000000419035 in parse_statement (cfile=0x8b1cf0, group=0x86c570, type=0, host_decl=0x0, declaration=1) at confpars.c:477
#10 0x0000000000418860 in conf_file_subparse (cfile=0x8b1cf0, group=0x86c570, group_type=0) at confpars.c:247
#11 0x0000000000418668 in read_conf_file (filename=0x7fffffffe62b "/etc/dhcp/dhcpd.conf", group=0x86c570, group_type=0, leasep=0) at confpars.c:176
#12 0x0000000000418330 in readconf () at confpars.c:61
#13 0x0000000000407f19 in main (argc=5, argv=0x7fffffffe368) at dhcpd.c:613