Bug#765327: lintian fails if the machine has a link-local IPv6 nameserver configured

[Philipp Kern]

Package: libnet-dns-perl,lintian
Severity: normal

This is likely a bug in libnet-dns-perl but I wonder if there are network
accesses from lintian.

% lintian ./openclonk_5.5.1-1_amd64.changes
warning: Cannot load check "binaries"
unresolvable name: fe80::4ee6:76ff:fe51:ae30%eth0 at /usr/share/perl5/Email/Valid.pm line 41.
Compilation failed in require at /usr/share/perl5/Lintian/Check.pm line 27.
BEGIN failed--compilation aborted at /usr/share/perl5/Lintian/Check.pm line 27.
Compilation failed in require at /usr/share/lintian/checks/binaries.pm line 30.
BEGIN failed--compilation aborted at /usr/share/lintian/checks/binaries.pm line 30.
Compilation failed in require at /usr/share/perl5/Lintian/CheckScript.pm line 253.

This is due to:

% cat /etc/resolv.conf
[...]
nameserver 10.0.3.1
nameserver fe80::4ee6:76ff:fe51:ae30%eth0
[...]

The syntax is perfectly valid and understood by glibc, but apparently
libemail-valid-perl tries to resolve(!?) it and fails. No, it just
loads Net::DNS::Resolver:

        $Resolver = Net::DNS::Resolver->new;

So it seems what explodes is Resolver/Base.pm's nameservers sub.

The message lintian displays is rather awkward: for a runtime error (runtime
configuration not parsable) one gets compilation failed. But I guess the load
is already guarded, hence the warning?

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lintian depends on:
ii  binutils                       2.24.51.20140918-1
ii  bzip2                          1.0.6-7
ii  diffstat                       1.58-1
ii  file                           1:5.19-2
ii  gettext                        0.19.2-2
ii  hardening-includes             2.5+nmu1
ii  intltool-debian                0.35.0+20060710.1
ii  libapt-pkg-perl                0.1.29+b2
ii  libarchive-zip-perl            1.38-1
ii  libclass-accessor-perl         0.34-1
ii  libclone-perl                  0.37-1+b1
ii  libdpkg-perl                   1.17.13
ii  libemail-valid-perl            1.195-1
ii  libfile-basedir-perl           0.03-1
ii  libipc-run-perl                0.92-1
ii  liblist-moreutils-perl         0.33-2+b1
ii  libparse-debianchangelog-perl  1.2.0-1.1
ii  libtext-levenshtein-perl       0.09-1
ii  libtimedate-perl               2.3000-2
ii  liburi-perl                    1.64-1
ii  man-db                         2.6.7.1-1
ii  patchutils                     0.3.3-1
ii  perl [libdigest-sha-perl]      5.20.1-1
ii  t1utils                        1.37-2.1

Versions of packages lintian recommends:
ii  libperlio-gzip-perl             0.18-3+b1
ii  perl                            5.20.1-1
ii  perl-modules [libautodie-perl]  5.20.1-1

Versions of packages lintian suggests:
pn  binutils-multiarch     <none>
ii  dpkg-dev               1.17.13
ii  libhtml-parser-perl    3.71-1+b2
ii  libtext-template-perl  1.46-1
ii  libyaml-perl           1.12-1
ii  xz-utils               5.1.1alpha+20120614-2

-- no debconf information