Bug#814139: apt: apt-get -o Acquire::Languages=none build-dep returns error

[Balint Reczey <balint@balintreczey.hu>]

Package: apt
Version: 1.2.2
Severity: normal
User: helmutg@debian.org
Usertags: rebootstrap

Dear APT Maintainers,

The following steps result an error using a clean amd64 pbuilder chroot:

# pbuilder login
/# sed -i 's/#//' /etc/apt/sources.list
/# apt-get update
...
/# apt-get -y -o Acquire::Languages=none  build-dep  attr
...
Setting up debhelper (9.20160115) ...
Processing triggers for libc-bin (2.21-7) ...
E: Not locked
E: Failed to process build dependencies
/# echo $?
100

Cheers,
Balint