[Bug 1687445] [NEW] dpkg-dev: dpkg-scan{packag, sourc}es fail when symlinks exist

[Steve M.]

Public bug reported:

This is the same bug reported in the Debian Bug report logs, #809219,
against dpkg-dev 1.18.4:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=809219

It can be reproduced using the same x.tgz file found in the original
Debian #809219 bug report. I have attached it here for reference.

To reproduce:

$ tar xfz x.tgz
$ dpkg-scanpackages .

The expected result is no error. The actual result is a failure with the
following output emitted:

/tmp/x/dists/sid/wtf/binary-all encountered a second time at
/usr/share/perl/5.22/File/Find.pm line 103.

Ubuntu Version:
Description:	Ubuntu 16.04.1 LTS
Release:	16.04

dpkg-dev Package Version: 1.18.4ubuntu1.2

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: dpkg-dev 1.18.4ubuntu1.2
ProcVersionSignature: Ubuntu 4.4.0-70.91-generic 4.4.49
Uname: Linux 4.4.0-70-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Mon May  1 09:51:41 2017
InstallationDate: Installed on 2016-12-13 (138 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: dpkg
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: dpkg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Attachment added: "x.tgz"
   https://bugs.launchpad.net/bugs/1687445/+attachment/4870415/+files/x.tgz

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https://bugs.launchpad.net/bugs/1687445

Title:
  dpkg-dev: dpkg-scan{packag,sourc}es fail when symlinks exist

Status in dpkg package in Ubuntu:
  New

Bug description:
  This is the same bug reported in the Debian Bug report logs, #809219,
  against dpkg-dev 1.18.4:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=809219

  It can be reproduced using the same x.tgz file found in the original
  Debian #809219 bug report. I have attached it here for reference.

  To reproduce:

  $ tar xfz x.tgz
  $ dpkg-scanpackages .

  The expected result is no error. The actual result is a failure with
  the following output emitted:

  /tmp/x/dists/sid/wtf/binary-all encountered a second time at
  /usr/share/perl/5.22/File/Find.pm line 103.

  Ubuntu Version:
  Description:	Ubuntu 16.04.1 LTS
  Release:	16.04

  dpkg-dev Package Version: 1.18.4ubuntu1.2

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: dpkg-dev 1.18.4ubuntu1.2
  ProcVersionSignature: Ubuntu 4.4.0-70.91-generic 4.4.49
  Uname: Linux 4.4.0-70-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon May  1 09:51:41 2017
  InstallationDate: Installed on 2016-12-13 (138 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: dpkg
  UpgradeStatus: No upgrade log present (probably fresh install)

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