The problem is with birdc so I run birdc with strace, ok? :)

rt_sigprocmask(SIG_BLOCK, [HUP INT QUIT ALRM TERM TSTP TTIN TTOU], [], 8) = 0
rt_sigaction(SIGINT, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTERM, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGHUP, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGQUIT, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGALRM, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTSTP, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTTOU, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTTIN, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGWINCH, {0x7f0889e45110, [], SA_RESTORER|SA_RESTART, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
read(0, "[", 1)                         = 1
rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTERM, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGHUP, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGALRM, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTSTP, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTTOU, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTTIN, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGWINCH, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, {0x7f0889e45110, [], SA_RESTORER|SA_RESTART, 0x7f08899e9390}, 8) = 0
select(4, [0 3], NULL, NULL, NULL)      = 1 (in [0])
rt_sigprocmask(SIG_BLOCK, [HUP INT QUIT ALRM TERM TSTP TTIN TTOU], [], 8) = 0
rt_sigaction(SIGINT, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTERM, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGHUP, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGQUIT, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGALRM, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTSTP, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTTOU, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigaction(SIGTTIN, {0x7f0889e45b60, [], SA_RESTORER, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGWINCH, {0x7f0889e45110, [], SA_RESTORER|SA_RESTART, 0x7f08899e9390}, {SIG_DFL, [], SA_RESTORER, 0x7f08899e9390}, 8) = 0
read(0, "A", 1)                         = 1
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x8} ---
+++ killed by SIGSEGV (core dumped) +++
Segmentation fault (core dumped)



2017-12-27 17:20 GMT+01:00 Michael McConnell <michael@winkstreaming.com>:
Try running

strace -f bird -f -u bird -g bird

and providing the last 20 or 30 lines of the output.

--
Michael McConnell
WINK Streaming;
email: michael@winkstreaming.com
toll free: 877-GO-4-WINK x 7400
direct: +1 312 281-5434
cell: +506 8706-2389
skype: wink-michael
web: http://winkstreaming.com

On Dec 27, 2017, at 10:01 AM, Mike Neo <neomikemac@gmail.com> wrote:

Hi,

using up arrow in birdc causes segmentation fault:

<image.png>

syslog:

Dec 27 16:55:56 r1 kernel: [331700.979873] birdc[15259] segfault at 0 ip 00007fab7221ba0b sp 00007ffef0ee16c8 error 4 in libreadline.so.6.3[7fab721ed000+3d000]

environment:

Description:            Ubuntu 16.04.3 LTS
Release:                16.04
Codename:      xenial

start cmd: bird -f -u bird -g bird

What's the problem?

BR,
Mike