I installed cups-dbg and got this backtrace on the core file: (gdb) thread apply all bt full
Thread 1 (process 10495): #0 0x00007f7b20a70f85 in raise () from /lib/libc.so.6 No symbol table info available. #1 0x00007f7b20a72af3 in abort () from /lib/libc.so.6 No symbol table info available. #2 0x00007f7b20a69ed9 in __assert_fail () from /lib/libc.so.6 No symbol table info available. #3 0x00007f7b20b0e0ff in rfc3484_sort () from /lib/libc.so.6 No symbol table info available. #4 0x00007f7b20a736e8 in msort_with_tmp () from /lib/libc.so.6 No symbol table info available. #5 0x00007f7b20a73c4f in qsort_r () from /lib/libc.so.6 No symbol table info available. #6 0x00007f7b20b0d41a in getaddrinfo () from /lib/libc.so.6 No symbol table info available. #7 0x00007f7b214ac226 in httpAddrGetList (hostname=0x7f7b22f83f50 "fox.dooz.org", family=0, service=0x0) at http-addrlist.c:302 current = <value optimized out> hints = {ai_flags = 0, ai_family = 0, ai_socktype = 1, ai_protocol = 0, ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0} results = <value optimized out> ipv6 = "C^�\000\000\000\000�&\000\000\000\000\000x\000\000\000\000\000\000\000�\030\212*�\177\000\000x\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\000� {\177\000\000zfc\"{\177\000\000\001\000\000\000{\177\000\000\000\000\000\000\000\000\000\000Ag? {\177\000\000\000\020�\000\000``:�>� {\177\000\000\000\000\000\000\000\000\000\000\027\031\212*�\177\000\000\000\000\000\000\000\000\000\000\003", '\0' <repeats 15 times>, "\004\000\000\000\000\000\000\000`\234< {\177\000\000\004\000\000\000\000\000\000\000x\000\000\000\000\000\000\000\220\030\212*�\177\000\000x\000\000\000\000\000\000\000�\030\212*�\177\000\000%�> {"... ipv6len = 0 error = <value optimized out> first = <value optimized out> addr = <value optimized out> cg = (_cups_globals_t *) 0x7f7b22f84f70 #8 0x00007f7b2287ec40 in cupsdStartListening () at listen.c:152 status = <value optimized out> p = <value optimized out> val = <value optimized out> lis = <value optimized out> s = '\0' <repeats 73 times>, "\020�\000\000``:", '\0' <repeats 16 times>, "\001\000\000\000\000\000\000\000����������������*\227< {\177\000\000\001\000\000\000\000\000\000\000\211�< {\177\000\000�� {\177\000\0000\034\212*�\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\227\034\212*�\177\000\000\000\000\000\000\000\000\000\000�(\000\000�(\000\000\000\000\000\000\000\000\000\000Hyb\"{\177\000\000 \035\212*�\177\000\000ܠ\211\"{\177\000\000\002\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000έ<\"{\177\000" have_domain = <value optimized out> encryptions = {0x7f7b2289dc31 "IfRequested", 0x7f7b2289dc3d "Never", 0x7f7b228949e6 "Required", 0x7f7b2289dc43 "Always"} #9 0x00007f7b2288dffb in cupsdStartServer () at server.c:86 No locals. #10 0x00007f7b2286d29c in main (argc=2, argv=<value optimized out>) at main.c:538 i = 2 opt = <value optimized out> fg = 1 fds = <value optimized out> con = <value optimized out> job = <value optimized out> lis = <value optimized out> current_time = <value optimized out> browse_time = <value optimized out> senddoc_time = <value optimized out> expire_time = <value optimized out> report_time = <value optimized out> event_time = <value optimized out> timeout = <value optimized out> limit = {rlim_cur = 1024, rlim_max = 1024} action = {__sigaction_handler = {sa_handler = 0x7fff2a8a1bd0, sa_sigaction = 0x7fff2a8a1bd0}, sa_mask = {__val = {0, 140166836840841, 140166834638503, 140166257704961, 140166836664744, 140733907082512, 0, 140166836840685, 140166834638503, 140166257704961, 140166834625452, 140733907082560, 140166836634824, 12, 31, 2090266759}}, sa_flags = 576921696, sa_restorer = 0x7f7b20a41b30} netif_time = <value optimized out>
I installed cups-dbg and got this backtrace on the core file:
(gdb) thread apply all bt full
Thread 1 (process 10495): 0x7f7b22f83f50 "fox.dooz.org", family=0, service=0x0) at http-addrlist.c:302 000\000\ 000�&\000\ 000\000\ 000\000x\ 000\000\ 000\000\ 000\000\ 000�\030\ 212*�\177\ 000\000x\ 000\000\ 000\000\ 000\000\ 000\004\ 000\000\ 000\000\ 000\000\ 000\000� {\177\000\ 000zfc\ "{\177\ 000\000\ 001\000\ 000\000{ \177\000\ 000\000\ 000\000\ 000\000\ 000\000\ 000Ag? {\177\000\ 000\000\ 020�\000\ 000``:� >� {\177\000\ 000\000\ 000\000\ 000\000\ 000\000\ 000\027\ 031\212* �\177\000\ 000\000\ 000\000\ 000\000\ 000\000\ 000\003" , '\0' <repeats 15 times>, "\004\000\ 000\000\ 000\000\ 000\000` \234< {\177\000\ 000\004\ 000\000\ 000\000\ 000\000\ 000x\000\ 000\000\ 000\000\ 000\000\ 220\030\ 212*�\177\ 000\000x\ 000\000\ 000\000\ 000\000\ 000�\030\ 212*�\177\ 000\000% �> {"... 000\000\ 000\000\ 000\000� ������� ������� �*\227< {\177\000\ 000\001\ 000\000\ 000\000\ 000\000\ 000\211� < {\177\000\000�� {\177\000\ 0000\034\ 212*�\177\ 000\000\ 000\000\ 000\000\ 000\000\ 000\000\ 001\000\ 000\000\ 000\000\ 000\000\ 227\034\ 212*�\177\ 000\000\ 000\000\ 000\000\ 000\000\ 000\000� (\000\000� (\000\000\ 000\000\ 000\000\ 000\000\ 000\000Hyb\ "{\177\ 000\000 \035\212* �\177\000\ 000ܠ\211\ "{\177\ 000\000\ 002\000\ 000\000\ 000\000\ 000\000\ 001\000\ 000\000\ 000\000\ 000\000έ< \"{\177\ 000"
current_ time = <value optimized out>
senddoc_ time = <value optimized out> handler = {sa_handler = 0x7fff2a8a1bd0, sa_sigaction = 0x7fff2a8a1bd0}, sa_mask = {__val = {0, 140166836840841, 140166834638503, 140166257704961, 140166836664744, 140733907082512, 0, 140166836840685, 140166834638503, 140166257704961, 625452, 140733907082560, 140166836634824, 12, 31, 2090266759}}, sa_flags = 576921696, sa_restorer = 0x7f7b20a41b30}
#0 0x00007f7b20a70f85 in raise () from /lib/libc.so.6
No symbol table info available.
#1 0x00007f7b20a72af3 in abort () from /lib/libc.so.6
No symbol table info available.
#2 0x00007f7b20a69ed9 in __assert_fail () from /lib/libc.so.6
No symbol table info available.
#3 0x00007f7b20b0e0ff in rfc3484_sort () from /lib/libc.so.6
No symbol table info available.
#4 0x00007f7b20a736e8 in msort_with_tmp () from /lib/libc.so.6
No symbol table info available.
#5 0x00007f7b20a73c4f in qsort_r () from /lib/libc.so.6
No symbol table info available.
#6 0x00007f7b20b0d41a in getaddrinfo () from /lib/libc.so.6
No symbol table info available.
#7 0x00007f7b214ac226 in httpAddrGetList (hostname=
current = <value optimized out>
hints = {ai_flags = 0, ai_family = 0, ai_socktype = 1, ai_protocol = 0, ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0}
results = <value optimized out>
ipv6 = "C^�\000\
ipv6len = 0
error = <value optimized out>
first = <value optimized out>
addr = <value optimized out>
cg = (_cups_globals_t *) 0x7f7b22f84f70
#8 0x00007f7b2287ec40 in cupsdStartListening () at listen.c:152
status = <value optimized out>
p = <value optimized out>
val = <value optimized out>
lis = <value optimized out>
s = '\0' <repeats 73 times>, "\020�\000\000``:", '\0' <repeats 16 times>, "\001\000\
have_domain = <value optimized out>
encryptions = {0x7f7b2289dc31 "IfRequested", 0x7f7b2289dc3d "Never", 0x7f7b228949e6 "Required", 0x7f7b2289dc43 "Always"}
#9 0x00007f7b2288dffb in cupsdStartServer () at server.c:86
No locals.
#10 0x00007f7b2286d29c in main (argc=2, argv=<value optimized out>) at main.c:538
i = 2
opt = <value optimized out>
fg = 1
fds = <value optimized out>
con = <value optimized out>
job = <value optimized out>
lis = <value optimized out>
browse_time = <value optimized out>
expire_time = <value optimized out>
report_time = <value optimized out>
event_time = <value optimized out>
timeout = <value optimized out>
limit = {rlim_cur = 1024, rlim_max = 1024}
action = {__sigaction_
140166834
netif_time = <value optimized out>