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;
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 michael@winkstreaming.com
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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