software-properties-gtk silently crashes when sourcegear repository is enabled

[Andrei Dziahel]

Repro:

1. Add sourcegear debian repository with `aptdcon --add-repository 'deb http://debian.sourcegear.com/ubuntu quantal main' && sudo apt-key adv --fetch-keys http://debian.sourcegear.com/SOURCEGEAR-GPG-KEY` command
2. refresh APT cache with aptdcon -c
3. run software-properties-gtk

Expected: "Software Properties" shows up

Actual behavior: software-properties-gtk crashes silently and apport prompt shows up

Disabling mentioned repository fixes this issue.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: software-properties-gtk 0.92.9
ProcVersionSignature: Ubuntu 3.5.0-20.31-generic 3.5.7.1
Uname: Linux 3.5.0-20-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
Date: Sat Dec 15 17:22:00 2012
EcryptfsInUse: Yes
MarkForUpload: True
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: Upgraded to quantal on 2012-11-05 (40 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[David (lofidevops)]

I get an issue specifically with the diffmerge package (running Ubuntu 12.04) - see https://bugs.launchpad.net/ubuntu/+source/apt-xapian-index/+bug/1086351

[Troy Stanger (stanger)]

I spent today debugging the issue with the diffmerge package (disclaimer: I am the one that built it originally). It turns out the error was that the control file had the wrong line endings (CRLF instead of simply LF). I have fixed the issue on our end and will be rebuilding the deb.

[David (lofidevops)]

Thanks Troy :)

[Brian Murray (brian-murray)]

I think this is the relevant traceback:

Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 103, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 178, in __init__
    self.init_drivers()
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 1097, in init_drivers
    self.devices = detect.system_device_drivers()
  File "/usr/lib/python3/dist-packages/UbuntuDrivers/detect.py", line 415, in system_device_drivers
    for pkg, pkginfo in system_driver_packages(apt_cache).items():
  File "/usr/lib/python3/dist-packages/UbuntuDrivers/detect.py", line 319, in system_driver_packages
    for p in packages_for_modalias(apt_cache, alias):
  File "/usr/lib/python3/dist-packages/UbuntuDrivers/detect.py", line 164, in packages_for_modalias
    cache_map = _apt_cache_modalias_map(apt_cache)
  File "/usr/lib/python3/dist-packages/UbuntuDrivers/detect.py", line 129, in _apt_cache_modalias_map
    m = package.candidate.record['Modaliases']
  File "/usr/lib/python3/dist-packages/apt/package.py", line 429, in record
    return Record(self._records.record)
  File "/usr/lib/python3/dist-packages/apt/package.py", line 186, in __init__
    self._rec = apt_pkg.TagSection(record_str)
ValueError: Unable to parse section data