[Bug 1716047] Re: rustc control file contains unsupported restriction formulas in control file

[Charles F. Stephens]

Right now we are stuck because we can't issue security updates
internally because we can't construct our APT repository.

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Title:
  rustc control file contains unsupported restriction formulas in
  control file

Status in rustc package in Ubuntu:
  Incomplete

Bug description:
  The trusty back port of the rustc source package breaks dependency
  computation using apt because it contains qualifiers in the Build-
  Depends that are not understood by the trusty version of apt.

  Build-Depends: debhelper (>= 9), rustc (>= 1.14.0+dfsg) [!powerpc], rustc (<= 1.15.1++) [!powerpc], autotools-dev, binutils-2.26, cmake3, curl, gperf, libedit-dev, llvm-3.9-dev (>= 1:3.9-5), llvm-3.9-tools (>= 1:3.9-5), python, zlib1g-dev, nodejs [!arm64] <!nocheck>, valgrind <!nocheck>, git <!nocheck>, procps <!nocheck>, libjs-jquery <!nocheck>, antlr <!nocheck>, bison <!nocheck>, flex <!nocheck>, default-jdk <!nocheck>
  Build-Depends-Indep: libjs-jquery <!nodoc>, pandoc (>= 1.9), po4a, texlive-xetex, texlive-latex-base, texlive-generic-recommended, texlive-fonts-recommended, lmodern

  Namely it's the "<!nocheck>" and "<!nodoc>" qualifiers.

  This is breaking our builds which run germinate which calls on APT to
  parse various APT files, include Sources (even though it doesn't
  actually use it):

  /usr/bin/germinate --no-rdepends -S file:///buildtree/germinate/seeds -s pure -a amd64 -c main,universe -d trusty,trusty-updates,trusty-security -m http://apt-svc.redacted.example.com/trusty/trusty-20170615
  rm: cannot remove ‘*’: No such file or directory
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/main/binary-amd64/Packages.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/main/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/main/source/Sources.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/main/source/Sources.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/main/debian-installer/binary-amd64/Packages.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/main/debian-installer/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/universe/binary-amd64/Packages.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/universe/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/universe/source/Sources.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/universe/source/Sources.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/universe/debian-installer/binary-amd64/Packages.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty/universe/debian-installer/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/binary-amd64/Packages.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/source/Sources.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/source/Sources.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/debian-installer/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/debian-installer/binary-amd64/Packages.gz file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/main/debian-installer/binary-amd64/Packages file ...
  Missing installer Packages file for main (ignoring)
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/universe/binary-amd64/Packages.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/universe/binary-amd64/Packages.bz2 file ...
  Downloading http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/universe/source/Sources.bz2 file ...
  Decompressing http://apt-svc.redacted.example.com/trusty/trusty-20170615/dists/trusty-updates/universe/source/Sources.bz2 file ...
  Traceback (most recent call last):
    File "/usr/bin/germinate", line 35, in <module>
      main(sys.argv)
    File "/usr/lib/python3/dist-packages/germinate/scripts/germinate_main.py", line 119, in main
      g.parse_archive(archive)
    File "/usr/lib/python3/dist-packages/germinate/germinator.py", line 512, in parse_archive
      self._parse_source(section)
    File "/usr/lib/python3/dist-packages/germinate/germinator.py", line 497, in _parse_source
      self._sources[src][field] = self._parse_src_depends(value)
    File "/usr/lib/python3/dist-packages/germinate/germinator.py", line 473, in _parse_src_depends
      return apt_pkg.parse_src_depends(value, False)
  ValueError: Problem Parsing Dependency
  root at dc200f95b5d5:~/oo# 

  Recommend removing these incompatible qualifiers from rustc control
  file for the trusty backport.

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