Currently seeing this on bionic also:

root@96b59285bce6:~# apt install -y bird2
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  bird2-doc
The following NEW packages will be installed:
  bird2
0 upgraded, 1 newly installed, 0 to remove and 105 not upgraded.
Need to get 376 kB of archives.
After this operation, 1061 kB of additional disk space will be used.
Get:1 http://ppa.launchpad.net/cz.nic-labs/bird/ubuntu bionic/main amd64 bird2 amd64 2.0.7-1+ubuntu18.04.1+deb.sury.org+1 [376 kB]
Fetched 376 kB in 1s (476 kB/s)
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package bird2.
(Reading database ... 21849 files and directories currently installed.)
Preparing to unpack .../bird2_2.0.7-1+ubuntu18.04.1+deb.sury.org+1_amd64.deb ...
Unpacking bird2 (2.0.7-1+ubuntu18.04.1+deb.sury.org+1) ...
Processing triggers for systemd (237-3ubuntu10.15) ...
Setting up bird2 (2.0.7-1+ubuntu18.04.1+deb.sury.org+1) ...
Error: The new file /usr/share/doc/bird2/examples/bird.conf does not exist!
dpkg: error processing package bird2 (--configure):
 installed bird2 package post-installation script subprocess returned error exit status 1
Processing triggers for systemd (237-3ubuntu10.15) ...
Errors were encountered while processing:
 bird2
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@96b59285bce6:~# ls /usr/share/doc/bird2/examples
bird.conf.gz

On Fri, Oct 4, 2019 at 3:10 PM Ondrej Filip <feela@network.cz> wrote:
On 04. 10. 19 21:35, Christoph wrote:
> Hello,

Hi!
Thank you for the report. I will check it.
        Ondrej


>
> the bird2 package from bird.network.cz
> for debian buster appears to be broken >
>> apt install bird2
>> Reading package lists... Done
>> Building dependency tree
>> Reading state information... Done
>> The following NEW packages will be installed:
>>    bird2
>> 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
>> Need to get 0 B/640 kB of archives.
>> After this operation, 1,327 kB of additional disk space will be used.
>> Selecting previously unselected package bird2.
>> (Reading database ... 35407 files and directories currently installed.)
>> Preparing to unpack .../bird2_2.0.6-1+0~20190916.13+debian10~1.gbp14a7a6_amd64.deb ...
>> Unpacking bird2 (2.0.6-1+0~20190916.13+debian10~1.gbp14a7a6) ...
>> Setting up bird2 (2.0.6-1+0~20190916.13+debian10~1.gbp14a7a6) ...
>> Error: The new file /usr/share/doc/bird2/examples/bird.conf does not exist!
>> dpkg: error processing package bird2 (--configure):
>>   installed bird2 package post-installation script subprocess returned error exit status 1
>> Processing triggers for man-db (2.8.5-2) ...
>> Processing triggers for systemd (241-7~deb10u1) ...
>> Errors were encountered while processing:
>>   bird2
>> E: Sub-process /usr/bin/dpkg returned an error code (1)