(gdb) bt full
#0  0x00007ffff73142a8 in raise () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007ffff731572a in abort () from /usr/lib/libc.so.6
No symbol table info available.
#2  0x00007ffff7350369 in __libc_message () from /usr/lib/libc.so.6
No symbol table info available.
#3  0x00007ffff7355d96 in malloc_printerr () from /usr/lib/libc.so.6
No symbol table info available.
#4  0x00007ffff735657e in _int_free () from /usr/lib/libc.so.6
No symbol table info available.
#5  0x0000000000415b1b in diag_freemsg (msg=0x7fffe80008c0) at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_general.c:212
No locals.
#6  0x000000000041f4c9 in diag_l2_proto_j1850_int_recv (d_l2_conn=d_l2_conn@entry=0x68a1d0, timeout=timeout@entry=250)
    at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l2_saej1850.c:247
        rv = <optimized out>
        dp = 0x68a650
        t_done = <optimized out>
        t_us = <optimized out>
        t0 = 9187087194993
        l1flags = 160
#7  0x000000000041f7b2 in diag_l2_proto_j1850_request (d_l2_conn=0x68a1d0, msg=<optimized out>, errval=0x7ffff5e53e1c)
    at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l2_saej1850.c:415
        rv = <optimized out>
        rmsg = 0x0
#8  0x00000000004137c6 in diag_l2_request (d_l2_conn=0x68a1d0, msg=0x7ffff5e53e20, errval=errval@entry=0x7ffff5e53e1c) at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l2.c:580
        rxmsg = <optimized out>
#9  0x0000000000414068 in diag_l3_base_request (dl3c=0x68aa60, txmsg=<optimized out>, errval=0x7ffff5e53e1c) at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l3.c:330
        rxmsg = 0x0
#10 0x0000000000413ee4 in diag_l3_request (dl3c=dl3c@entry=0x68aa60, txmsg=txmsg@entry=0x7ffff5e53e20, errval=errval@entry=0x7ffff5e53e1c)
    at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l3.c:228
        rxmsg = <optimized out>
        dl3p = 0x42b020 <diag_l3_j1979>
#11 0x0000000000414104 in diag_l3_j1979_keepalive (d_l3_conn=d_l3_conn@entry=0x68aa60) at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l3_saej1979.c:713
        msg = {fmt = 0 '\000', type = 0 '\000', dest = 0 '\000', src = 241 '\361', len = 2 '\002', data = 0x7ffff5e53e50 "\001", rxtime = 0, next = 0x0, idata = 0x0, iflags = 0 '\000'}
        rxmsg = <optimized out>
        data = "\001\000\000\000\000"
        errval = 0
#12 0x0000000000414213 in diag_l3_j1979_timer (d_l3_conn=0x68aa60, ms=<optimized out>) at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l3_saej1979.c:783
        rv = <optimized out>
        debug_l2_orig = 0
        debug_l1_orig = 0
        __PRETTY_FUNCTION__ = "diag_l3_j1979_timer"
#13 0x0000000000413fd2 in diag_l3_timer () at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_l3.c:274
        diffms = <optimized out>
        dp = <optimized out>
        conn = 0x68aa60
        now = <optimized out>
#14 0x0000000000411869 in diag_os_periodic (sv=...) at /home/dylan/aur/freediag-git/src/freediag/scantool/diag_os_unix.c:128
---Type <return> to continue, or q <return> to quit---
No locals.
#15 0x00007ffff7686c6e in ?? () from /usr/lib/librt.so.1
No symbol table info available.
#16 0x00007ffff6e5e424 in start_thread () from /usr/lib/libpthread.so.0
No symbol table info available.
#17 0x00007ffff73c8cbd in clone () from /usr/lib/libc.so.6
No symbol table info available.
(gdb)

(gdb) info thread
  Id   Target Id         Frame
  1    Thread 0x7ffff7fc2700 (LWP 26640) "scantool" 0x00007ffff73bbc0d in read () from /usr/lib/libc.so.6
  2    Thread 0x7ffff7ff7700 (LWP 26644) "scantool" 0x00007ffff7686bea in ?? () from /usr/lib/librt.so.1
  87   Thread 0x7ffff6e56700 (LWP 26730) "scantool" 0x00007ffff73bbc0d in read () from /usr/lib/libc.so.6
  88   Thread 0x7ffff6655700 (LWP 26731) "scantool" 0x00007ffff73bbc0d in read () from /usr/lib/libc.so.6
* 89   Thread 0x7ffff5e54700 (LWP 26732) "scantool" 0x00007ffff73142a8 in raise () from /usr/lib/libc.so.6
(gdb)