Running apt-check --package-names returns an unknown error

[Woody]

When running /usr/lib/update-notifier/apt-check --package-names the following error is returned:

$ /usr/lib/update-notifier/apt-check --package-names
E: Unknown Error: '<class 'TypeError'>' (map() must have at least two arguments.)

What I expected was a list of packages which can be upgraded.

From what I understand, the map function requires 2 arguments, but the list comprehension used is only creating a single argument, which is the package name.

I found if I changed the function

def write_package_names(outstream, cache, depcache):
    " write out package names that change to outstream "
    pkgs = [pkg for pkg in cache.packages if depcache.marked_install(pkg) or
        depcache.marked_upgrade(pkg)]
    outstream.write("\n".join(map([p.name for p in pkgs])))

def write_package_names(outstream, cache, depcache):
    " write out package names that change to outstream "
    pkgs = [pkg for pkg in cache.packages if depcache.marked_install(pkg) or
        depcache.marked_upgrade(pkg)]
    outstream.write("\n".join([p.name for p in pkgs])) #Removed the map() function

Additional info:
$ lsb_release -rd
Description: Ubuntu 15.10
Release: 15.10

$ apt-cache policy update-notifier-common
update-notifier-common:
  Installed: 3.163
  Candidate: 3.163
  Version table:
 *** 3.163 0
        500 http://gb.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
        100 /var/lib/dpkg/status

Thanks

Dave

[Stephen (1012web)]

I can confirm this bug. I'm also seeing this on my system that I just upgraded to Wily. This problem did not exist prior to the upgrade.

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=15.10
DISTRIB_CODENAME=wily
DISTRIB_DESCRIPTION="Ubuntu 15.10"

I have a cron job that uses apt-check to check for available updates. This bug is breaking it.

[Launchpad Janitor (janitor)]

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

[Launchpad Janitor (janitor)]

This bug was fixed in the package update-notifier - 3.166

---------------
update-notifier (3.166) xenial; urgency=medium

  * data/apt_check.py: resolve crash when running apt-check with
    --package-names, thanks to Launchpad user Woody for the fix.
    (LP: #1512326)

 -- Brian Murray <email address hidden> Wed, 10 Feb 2016 11:57:26 -0800

[Brian Murray (brian-murray)]

Hello Woody, or anyone else affected,

Accepted update-notifier into wily-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/update-notifier/3.163.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Woody (dave-woodwardmail)]

Have tested version 3.163.1, and can confirm this is fixed.

Thanks

Woody

$ /usr/lib/update-notifier/apt-check --package-names
libavresample-ffmpeg2
gstreamer1.0-plugins-bad-faad
simple-scan
gstreamer1.0-libav
gir1.2-gst-plugins-base-1.0
libgstreamer-plugins-base1.0-0
libpgm-5.1-0
gstreamer1.0-plugins-base
gir1.2-gtk-3.0
gstreamer1.0-x
gstreamer1.0-plugins-ugly-amr

$ dpkg -s update-notifier-common
Package: update-notifier-common
Status: install ok installed
Priority: optional
Section: gnome
Installed-Size: 1372
Maintainer: Michael Vogt <email address hidden>
Architecture: all
Source: update-notifier
Version: 3.163.1

[Woody (dave-woodwardmail)]

Hi

I can confirm this is fixed.

Thanks

Woody

$ dpkg -s update-notifier-common
Package: update-notifier-common
Status: install ok installed
Priority: optional
Section: gnome
Installed-Size: 1372
Maintainer: Michael Vogt <email address hidden>
Architecture: all
Source: update-notifier
Version: 3.163.1

$ /usr/lib/update-notifier/apt-check --package-names
libavresample-ffmpeg2
gstreamer1.0-plugins-bad-faad
simple-scan
gstreamer1.0-libav
gir1.2-gst-plugins-base-1.0
libgstreamer-plugins-base1.0-0
libpgm-5.1-0

[Launchpad Janitor (janitor)]

This bug was fixed in the package update-notifier - 3.163.1

---------------
update-notifier (3.163.1) wily-proposed; urgency=medium

  * data/apt_check.py: resolve crash when running apt-check with
    --package-names, thanks to Launchpad user Woody for the fix.
    (LP: #1512326)

 -- Brian Murray <email address hidden> Wed, 10 Feb 2016 14:12:02 -0800

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for update-notifier has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.