muon-discover crashed with SIGSEGV in QApt::Backend::availablePackages()

[Benjamin]

When I was opening Muon Package manager it suddenly crashed and closed.

ProblemType: Crash
DistroRelease: Ubuntu 15.10
Package: muon-discover 4:5.4.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-12.14-generic 4.2.1
Uname: Linux 4.2.0-12-generic x86_64
ApportVersion: 2.19-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Oct 1 11:18:07 2015
ExecutablePath: /usr/bin/muon-discover
InstallationDate: Installed on 2015-09-29 (1 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150825.1)
ProcCmdline: /usr/bin/muon-discover
ProcEnviron:
 LANGUAGE=es
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_CL.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f6604cbaff0: mov (%rsi),%rax
 PC (0x7f6604cbaff0) ok
 source "(%rsi)" (0x00000020) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: muon
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libQApt.so.3
 QApt::Backend::availablePackages() const () from /usr/lib/x86_64-linux-gnu/libQApt.so.3
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/muon/muon-applications-backend.so
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/muon/muon-applications-backend.so
 ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
Title: muon-discover crashed with SIGSEGV in QApt::Backend::availablePackages()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
XsessionErrors:
 (process:1680): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
 (firefox:1680): Gtk-WARNING **: Theme directory apps/system-power-actions of theme breeze has no size field
 (firefox:1680): Gtk-WARNING **: Theme directory apps/toolbar of theme breeze has no size field
 (firefox:1680): Gtk-WARNING **: Theme directory categories/kickoff-menu-tabs of theme breeze has no size field

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1495016, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.