Bug#807365: cowbuilder: network broken in cowbuilder - cannot resolve any hostname

[Norbert Preining]

Package: cowbuilder
Version: 0.75
Severity: grave
Justification: renders package unusable

Dear all,

probably since one of the updates of pbuilder, cowbuilder stopped 
being able to resolve host names:
# cowbuilder --login --save-after-login
 -> Copying COW directory
  forking: rm -rf /var/cache/pbuilder/build/cow.11509 
  forking: cp -al /var/cache/pbuilder/base.cow /var/cache/pbuilder/build/cow.11509 
I: removed stale ilistfile /var/cache/pbuilder/build/cow.11509/.ilist
 -> Invoking pbuilder
  forking: pbuilder login --buildplace /var/cache/pbuilder/build/cow.11509 --no-targz --internal-chrootexec chroot /var/cache/pbuilder/build/cow.11509 cow-shell 
W: /root/.pbuilderrc does not exist
I: Running in no-targz mode
I: copying local configuration
I: mounting /proc filesystem
I: mounting /run/shm filesystem
I: mounting /dev/pts filesystem
I: policy-rc.d already exists
I: Obtaining the cached apt archive contents
I: entering the shell


root at wienerschnitzel:/# apt-get update
Err http://ftp2.jp.debian.org sid InRelease
  
Err http://ftp2.jp.debian.org sid Release.gpg
  Could not resolve 'ftp2.jp.debian.org'
Reading package lists... Done
W: Failed to fetch http://ftp2.jp.debian.org/debian/dists/sid/InRelease  

W: Failed to fetch http://ftp2.jp.debian.org/debian/dists/sid/Release.gpg  Could not resolve 'ftp2.jp.debian.org'

W: Some index files failed to download. They have been ignored, or old ones used instead.



Same happens with any other host. Network seems to be unusable.

Thanks

Norbert


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.4.0-rc3+ (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages cowbuilder depends on:
ii  cowdancer  0.75
ii  libc6      2.21-3
ii  pbuilder   0.221.1

cowbuilder recommends no packages.

cowbuilder suggests no packages.

-- no debconf information