(gdb) bt
#0 0xd28f92f0 in countbytes () from /lib/libc.so.1
#1 0xd2939805 in _ndoprnt () from /lib/libc.so.1
#2 0xd293bc30 in vsnprintf () from /lib/libc.so.1
#3 0x080aa2b4 in tor_vsnprintf (str=0x0, size=3533398016,
format=0x80c9d68 "Unable to parse '%s', or no nameservers in '%s'",
args=0x8047c44 "") at compat.c:320
#4 0x080a68da in logv (severity=4, domain=65536,
funcname=0x80c9839 "configure_nameservers",
format=0x80c9d68 "Unable to parse '%s', or no nameservers in '%s'",
ap=0x8047c44 "") at log.c:184
#5 0x080a6a53 in _log_fn (severity=0, domain=0,
fn=0x80c9d7b "', or no nameservers in '%s'",
format=0x80c9d68 "Unable to parse '%s', or no nameservers in '%s'")
at log.c:277
#6 0x08080575 in configure_nameservers (force=0) at dns.c:1547
#7 0x08087ca3 in tor_main (argc=1, argv=0x8047e80) at main.c:1212
#8 0x0804c700 in _start ()