Bug#753944: pbuilder: USENETWORK=no breaks package builds

[gregor herrmann]

Package: pbuilder
Version: 0.215+nmu1
Severity: important

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After getting interesting build failures (libdancer2-perl
0.143000+dfsg-1) like:

>> Dancer2 v0.143000 server 11716 listening on http://0.0.0.0:50189
cannot open port: 50189 at /usr/share/perl5/Test/TCP.pm line 51.
# Looks like your test exited with 101 before it could output anything.

I remembered something about networking in pbuilder, and indeed, both
- - going back to 0.215, and
- - using 0.215+nmu2 and setting USENETWORK=yes
make the test suite pass again.

I've seen this only with libdancer2-perl so far but I guess quite a
few packages which start a local daemon for tests are affected.

Turning off networking (as in: access to the wide world outside the
chroot) is a good idea in general (I'm doing it with iptables via a
hook) but making packages unbuildable not so much :)


Cheers,
gregor

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