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

[Robie Basak]

Thank you for the report and the patch!

> This is breaking our builds which run germinate which calls on APT to
parse various APT files...

Whose builds? Please can you explain what you're actually trying to do?

As this doesn't affect newer releases, I'd normally ask you to go
through https://wiki.ubuntu.com/StableReleaseUpdates to get a fix into
Trusty, which includes justification that the fix should land under SRU
criteria.

But rustc entered Trusty through the security update process. I'm
guessing (but am not sure) that it was required for a Firefox security
update.

Given that it is quite special, I think we really need to understand
your use case in order to know what process to use to fix it.

I subscribed Chris in case he is able to just drop the build profile
specifiers in a subsequent backport.

** Changed in: rustc (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1716047

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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