Reading symbols from /lib/libnss_dns.so.2...done.
Loaded symbols for /lib/libnss_dns.so.2
---Type <return> to continue, or q <return> to quit---
#0  0x0805ac4e in ast_hangup (chan=0x2b233db8) at channel.c:679
679             if (clone->pvt->writetrans)
(gdb) bt
#0  0x0805ac4e in ast_hangup (chan=0x2b233db8) at channel.c:679
#1  0x2ae17cb6 in do_parking_thread (ignore=0x0) at res_features.c:621
#2  0x2aad0dfe in pthread_start_thread () from /lib/libpthread.so.0
#3  0x2ac729aa in clone () from /lib/libc.so.6
(gdb)