thank you for the kind reply, it was indeed a PEBCAK issue,
I fixed my environment and it is working now as expected.
2019-03-20 6:40 GMT+01:00, SZ Lin (林上智) :
> Sebastian Stabbert 於 2019年1月26日 週六
>> Package: googler
>> Version: 2.9.0-1
>> Severity: normal
> Could you describe your operating environment? I think it might be a
> PEBCAK issue.
> This issue won't be able to reproduce in my Linux environment.
> However, this issue
> appears in the remote console (e.g., putty). After using the tool of
> git bisec, I've confirmed v3.7.1 
> fixed this issue. The reason is that there is no agent in remote
> console; therefore the argument of "--ua" is needed.
> Please feel free to use v3.7.1 of googler in stretch-backports archive .
>  https://packages.debian.org/stretch-backports/googler
>> -- System Information:
>> Debian Release: 9.6
>> APT prefers stable
>> APT policy: (500, 'stable')
>> Architecture: amd64 (x86_64)
>> Kernel: Linux 4.13.0-38-generic (SMP w/8 CPU cores)
>> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
>> LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
>> Shell: /bin/sh linked to /bin/dash
>> Init: systemd (via /run/systemd/system)
>> Versions of packages googler depends on:
>> ii python3 3.5.3-1
>> googler recommends no packages.
>> googler suggests no packages.
>> -- no debconf information