(gdb) bt
#0  0x00007ffff5aad6d0 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x0000000000497505 in Curl_poll (ufds=0x7fffffffd1c0, nfds=1, timeout_ms=0) at select.c:371
#2  0x000000000049a57f in waitperform (conn=0xa05df8, timeout_ms=0) at asyn-ares.c:287
#3  0x000000000049a67f in Curl_resolver_is_resolved (conn=0xa05df8, dns=0x7fffffffd328) at asyn-ares.c:324
#4  0x000000000049b80f in Curl_resolv (conn=0xa05df8, hostname=0xa06418 "romavictrix.blogspot.com", port=80, entry=0x7fffffffd
3e0) at hostip.c:463
#5  0x000000000049b915 in Curl_resolv_timeout (conn=0xa05df8, hostname=0xa06418 "romavictrix.blogspot.com", port=80, entry=0x7
fffffffd3e0, timeoutms=60000) at hostip.c:628
#6  0x00000000004b1bed in resolve_server (data=0x97b8e8, conn=0xa05df8, async=0x7fffffffd726) at url.c:4583
#7  0x00000000004b2d37 in create_conn (data=0x97b8e8, in_connect=0xa05510, async=0x7fffffffd726) at url.c:5066
#8  0x00000000004b2feb in Curl_connect (data=0x97b8e8, in_connect=0xa05510, asyncp=0x7fffffffd726, protocol_done=0x7fffffffd72
5) at url.c:5197
#9  0x0000000000492db1 in multi_runsingle (multi=0x74def8, now=..., easy=0xa054f8) at multi.c:1045
#10 0x0000000000495023 in multi_socket (multi=0x74def8, checkall=false, s=-1, ev_bitmask=0, running_handles=0x7fffffffdc24) at
 multi.c:2194
#11 0x0000000000495480 in curl_multi_socket_action (multi_handle=0x74def8, s=-1, ev_bitmask=0, running_handles=0x7fffffffdc24)
 at multi.c:2274
#12 0x0000000000470cfb in timer_cb (fd=-1, kind=1, userp=0x7fffffffd9d0) at src/crawler.cc:767
#13 0x00007ffff704f97c in event_base_loop () from /usr/lib/libevent-2.0.so.5
#14 0x00000000004737da in main (argc=1, argv=0x7fffffffdec8) at src/crawler.cc:1133