(gdb) bt
#0  0x00007f7ff5ea39ba in ___lwp_park60 () from /usr/lib/libc.so.12
#1  0x00007f7ff560979e in ?? () from /usr/lib/libpthread.so.1
#2  0x00007f7ff4a10c53 in _Unwind_Find_FDE () from /usr/lib/libgcc_s.so.1
#3  0x00007f7ff4a0633d in ?? () from /usr/lib/libgcc_s.so.1
#4  0x00007f7ff4a070c1 in ?? () from /usr/lib/libgcc_s.so.1
#5  0x00007f7ff4a07917 in _Unwind_Backtrace () from /usr/lib/libgcc_s.so.1
#6  0x00007f7ff6214690 in __sanitizer::BufferedStackTrace::SlowUnwindStack(unsigned long, unsigned int) () from /usr/lib/liblsan.so.2
#7  0x00007f7ff6206135 in malloc () from /usr/lib/liblsan.so.2
#8  0x00007f7ff4a1032c in ?? () from /usr/lib/libgcc_s.so.1
#9  0x00007f7ff4a10be6 in _Unwind_Find_FDE () from /usr/lib/libgcc_s.so.1
#10 0x00007f7ff4a0633d in ?? () from /usr/lib/libgcc_s.so.1
#11 0x00007f7ff4a070c1 in ?? () from /usr/lib/libgcc_s.so.1
#12 0x00007f7ff4a07917 in _Unwind_Backtrace () from /usr/lib/libgcc_s.so.1
#13 0x00007f7ff6214690 in __sanitizer::BufferedStackTrace::SlowUnwindStack(unsigned long, unsigned int) () from /usr/lib/liblsan.so.2
#14 0x00007f7ff6206135 in malloc () from /usr/lib/liblsan.so.2
#15 0x0000000000420780 in new_malloc (size=<optimized out>) at /home/mrg/ircii/source/ircaux.c:137
#16 0x0000000000420851 in malloc_strncpy (extra=0, src=0x7f7fffffeb60 "/home/mrg/ircii/obj/irc", ptr=0x678060 <args_str>)
    at /home/mrg/ircii/source/ircaux.c:175
#17 malloc_strncpy (ptr=0x678060 <args_str>, src=0x7f7fffffeb60 "/home/mrg/ircii/obj/irc", extra=0) at /home/mrg/ircii/source/ircaux.c:163
#18 0x000000000044287a in parse_args (argc=3, argv=0x7f7fffffe4f8) at /home/mrg/ircii/source/irc.c:469
#19 main (argc=3, argv=0x7f7fffffe4f8, envp=<optimized out>) at /home/mrg/ircii/source/irc.c:905