Random crash with return to login page (kactivitymanagerd crashed with SIGSEGV in QSqlDatabase::close())

[Krzysztof Cybulski]

1) The release of Ubuntu you are using
lsb_release -rd
Description: Ubuntu 15.04
Release: 15.04

2) The version of the package you are using

apt-cache policy kactivities
kactivities:
  Zainstalowana: 5.9.0-0ubuntu1
  Kandydująca: 5.9.0-0ubuntu1
  Tabela wersji:
 *** 5.9.0-0ubuntu1 0
        500 http://pl.archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen

Not to crash

4) What happened instead

It crash at random times, syslog show error:

kactivitymanage[2559]: segfault at 7fcd6eceacd0 ip 00007fcd6c297031 sp 00007ffd877c96a8 error 4 in libQt5Sql.so.5.4.1[7fcd6c283000+3f000]

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: kactivities 5.9.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Apr 29 18:54:30 2015
ExecutablePath: /usr/bin/kactivitymanagerd
InstallationDate: Installed on 2014-06-02 (332 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
ProcCmdline: /usr/bin/kactivitymanagerd start-daemon
ProcEnviron:
 LANGUAGE=pl:en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fcd6c297031 <_ZN12QSqlDatabase5closeEv+17>: mov 0xc0(%rax),%rax
 PC (0x7fcd6c297031) ok
 source "0xc0(%rax)" (0x7fcd6eceacd0) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: kactivities-kf5
StacktraceTop:
 QSqlDatabase::close() () from /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5
 QSqlDatabase::~QSqlDatabase() () from /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5
 ?? () from /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5
 QHashData::free_helper(void (*)(QHashData::Node*)) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 ?? () from /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5
Title: kactivitymanagerd crashed with SIGSEGV in QSqlDatabase::close()
UpgradeStatus: Upgraded to vivid on 2015-03-28 (33 days ago)
UserGroups: adm autopilot cdrom dialout dip libvirtd lpadmin plugdev sambashare sudo tty

[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 #1443711, 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.

[Krzysztof Cybulski (krzysiek-cybulski)]

If I try bug #1443711 i get there is no such bug. Can someone confirm this.

[Bharat Rajagopalan (mendred)]

Hi, I am also facing the same issue and am unable to open bug #1443711 - does that even exist?

[Launchpad Janitor (janitor)]

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

[Bharat Rajagopalan (mendred)]

I found this reference

https://forum.kde.org/viewtopic.php?f=289&t=124690

which refers to this bug

https://bugs.kde.org/show_bug.cgi?id=341963

the solution sugggested there is to clear the contents of ~/.cache/ and to check if there is sufficient free space. Just did that, and it seems to have fixed the problem atleast for now - will wait and see if it crashes again.

I suspect it affects folks who have upgraded from older versions and possibly have a corrupted cache as a result - I have also upgraded

[Marco Scacchi (scamar)]

I can confirm that removing the ~/.cache fix the problem.
I've upgraded from 14.10 to 15.04

[Alberto Salvia Novella (es20490446e)]

Please:
  1. Report to <https://bugs.kde.org/>.
  2. Paste the new report URL here.
  3. Set this bug status back to "confirmed".

Thank you.

[yossarian_uk (morgancoxuk)]

I think my bug is related

https://bugs.launchpad.net/ubuntu/+source/kactivities-kf5/+bug/1569270

In my case using the kubuntu 15.10 PPA backports (plasma 5.5.4 / applications 5.18) fixed it.

The default kubuntu 15.10 packages however crashed.