package memtest86+ 4.20-1.1ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[Edward Bridges]

Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-2.6.32-62-generic-pae
Processing triggers for resolvconf ...
Errors were encountered while processing:
 linux-image-3.2.0-64-generic
 linux-image-3.2.0-64-generic-pae
 memtest86+
 ubuntu-standard
 linux-image-generic
 linux-generic
 linux-image-generic-pae
 linux-generic-pae
Error in function:

ERROR:root:not handled exception:
SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

A fatal error occurred

Please report this as a bug and include the files
/var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in
your report. The upgrade has aborted.
Your original sources.list was saved in
/etc/apt/sources.list.distUpgrade.

SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

ERROR:root:SystemError from cache.commit(): installArchives() failed

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.................................ERROR: hook /usr/share/apport/general-hooks/ubuntu.py crashed:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 719, in add_hooks_info
    symb['add_info'](self, ui)
  File "/usr/share/apport/general-hooks/ubuntu.py", line 52, in add_info
    check_attachment_for_errors(report, log)
  File "/usr/share/apport/general-hooks/ubuntu.py", line 164, in check_attachment_for_errors
    if attachment in report and re.search(grub_error, report[attachment], re.MULTILINE):
  File "/usr/lib/python2.7/re.py", line 142, in search
    return _compile(pattern, flags).search(string)
TypeError: expected string or buffer
....

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: memtest86+ 4.20-1.1ubuntu1
Uname: Linux 2.6.33-xen3-U i686
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Mon Jun 23 17:40:34 2014
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu-Server 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
MarkForUpload: True
SourcePackage: memtest86+
Title: package memtest86+ 4.20-1.1ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2014-06-23 (0 days ago)