[DRE-maint] Bug#924845: nanoc: FTBFS: build-dependency not installable: ruby-fog (>= 0.13.0~)

[Lucas Nussbaum]

Source: nanoc
Version: 4.11.0-2
Severity: serious
Tags: buster sid
User: debian-qa at lists.debian.org
Usertags: qa-ftbfs-20190315 qa-ftbfs
Justification: FTBFS in buster on amd64

Hi,

During a rebuild of all packages in buster (in a buster chroot, not a
sid chroot), your package failed to build on amd64.

Relevant part (hopefully):
> +------------------------------------------------------------------------------+
> | Install package build dependencies                                           |
> +------------------------------------------------------------------------------+
> 
> 
> Setup apt archive
> -----------------
> 
> Merged Build-Depends: asciidoc-base, asciidoctor, coderay, debhelper (>= 10~), gem2deb, git, highlight, pry, python-pygments, rake, rsync, ruby-addressable (>= 2.5~), ruby-adsf, ruby-builder, ruby-coffee-script, ruby-contracts, ruby-coveralls, ruby-cri (>= 2.15~), ruby-ddmetrics, ruby-ddmemoize, ruby-ddplugin, ruby-erubi, ruby-erubis, ruby-fog (>= 0.13.0~), ruby-fuubar, ruby-haml, ruby-hamster, ruby-brandur-json-schema, ruby-kramdown, ruby-listen, ruby-maruku, ruby-mime-types, ruby-minitest, ruby-mocha, ruby-mustache, ruby-nokogiri, ruby-nokogumbo, ruby-parallel (>= 1.12~), ruby-pygments.rb, ruby-rack, ruby-rdiscount, ruby-redcarpet, ruby-redcloth, ruby-ref, ruby-rouge (>= 2~), ruby-rspec, ruby-rspec-its, ruby-rubypants, ruby-sass (>= 3.2.2~), ruby-slim, ruby-slow-enumerator-tools, ruby-timecop, ruby-tomlrb (>= 1.2~), ruby-uglifier, yard
> Filtered Build-Depends: asciidoc-base, asciidoctor, coderay, debhelper (>= 10~), gem2deb, git, highlight, pry, python-pygments, rake, rsync, ruby-addressable (>= 2.5~), ruby-adsf, ruby-builder, ruby-coffee-script, ruby-contracts, ruby-coveralls, ruby-cri (>= 2.15~), ruby-ddmetrics, ruby-ddmemoize, ruby-ddplugin, ruby-erubi, ruby-erubis, ruby-fog (>= 0.13.0~), ruby-fuubar, ruby-haml, ruby-hamster, ruby-brandur-json-schema, ruby-kramdown, ruby-listen, ruby-maruku, ruby-mime-types, ruby-minitest, ruby-mocha, ruby-mustache, ruby-nokogiri, ruby-nokogumbo, ruby-parallel (>= 1.12~), ruby-pygments.rb, ruby-rack, ruby-rdiscount, ruby-redcarpet, ruby-redcloth, ruby-ref, ruby-rouge (>= 2~), ruby-rspec, ruby-rspec-its, ruby-rubypants, ruby-sass (>= 3.2.2~), ruby-slim, ruby-slow-enumerator-tools, ruby-timecop, ruby-tomlrb (>= 1.2~), ruby-uglifier, yard
> dpkg-deb: building package 'sbuild-build-depends-nanoc-dummy' in '/<<BUILDDIR>>/resolver-nauGEh/apt_archive/sbuild-build-depends-nanoc-dummy.deb'.
> dpkg-scanpackages: warning: Packages in archive but missing from override file:
> dpkg-scanpackages: warning:   sbuild-build-depends-core-dummy sbuild-build-depends-nanoc-dummy
> dpkg-scanpackages: info: Wrote 2 entries to output Packages file.
> Ign:1 copy:/<<BUILDDIR>>/resolver-nauGEh/apt_archive ./ InRelease
> Get:2 copy:/<<BUILDDIR>>/resolver-nauGEh/apt_archive ./ Release [963 B]
> Ign:3 copy:/<<BUILDDIR>>/resolver-nauGEh/apt_archive ./ Release.gpg
> Get:4 copy:/<<BUILDDIR>>/resolver-nauGEh/apt_archive ./ Sources [846 B]
> Get:5 copy:/<<BUILDDIR>>/resolver-nauGEh/apt_archive ./ Packages [918 B]
> Fetched 2727 B in 0s (0 B/s)
> Reading package lists...
> Reading package lists...
> 
> Install nanoc build dependencies (apt-based resolver)
> -----------------------------------------------------
> 
> Installing build dependencies
> Reading package lists...
> Building dependency tree...
> Reading state information...
> Some packages could not be installed. This may mean that you have
> requested an impossible situation or if you are using the unstable
> distribution that some required packages have not yet been created
> or been moved out of Incoming.
> The following information may help to resolve the situation:
> 
> The following packages have unmet dependencies:
>  sbuild-build-depends-nanoc-dummy : Depends: ruby-fog (>= 0.13.0~) but it is not installable
> E: Unable to correct problems, you have held broken packages.
> apt-get failed.

The full build log is available from:
   http://aws-logs.debian.net/2019/03/15/nanoc_4.11.0-2_testing.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.