Apps crash in QHashData::free_helper on shutdown

Bug #512169 reported by Kai Kasurinen on 2010-01-25
This bug affects 9 people
Affects Status Importance Assigned to Milestone
KDE Base
qt4-x11 (Ubuntu)

Bug Description

Binary package hint: kdebase-runtime

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Mon Jan 25 04:26:08 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/nepomukservicestub
Package: kdebase-runtime 4:4.3.95-0ubuntu1
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
 PATH=(custom, user)
ProcVersionSignature: Ubuntu 2.6.32-11.15-generic
 Segfault happened at: 0x7f695f2367fc <_ZN6QMutex4lockEv+12>: cmpb $0x0,(%rdx)
 PC (0x7f695f2367fc) ok
 source "$0x0" ok
 destination "(%rdx)" (0x00000020) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: kdebase-runtime
 QMutex::lock() () from /usr/lib/
 ?? ()
 ?? () from /usr/lib/
 QHashData::free_helper(void (*)(QHashData::Node*))
 ?? () from /usr/lib/
Title: nepomukservicestub crashed with SIGSEGV in QMutex::lock()
Uname: Linux 2.6.32-11-generic x86_64
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev staff video
 (process:3690): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (polkit-gnome-authentication-agent-1:4034): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

Kai Kasurinen (kai-kasurinen) wrote :

 QMutex::lock (this=0xc0a090)
 ~Iterator (this=0x7f694800acf0)
 QHashData::free_helper (this=0xbbb9c0,
 Soprano::Server::ServerConnection::run (

Changed in kdebase-runtime (Ubuntu):
importance: Undecided → Medium
tags: removed: need-amd64-retrace

Oops, wrong tab.

Changed in kdebase:
importance: Unknown → Undecided
status: Unknown → New
summary: - nepomukservicestub crashed with SIGSEGV in QMutex::lock()
+ Apps crash in QHashData::free_helper on shutdown
visibility: private → public
Jonathan Thomas (echidnaman) wrote :

Qt bug, should be fixed in Qt 4.6.1.

Changed in kdebase:
status: New → Invalid
affects: kdebase-runtime (Ubuntu) → qt4-x11 (Ubuntu)
Changed in qt4-x11 (Ubuntu):
status: New → Fix Committed
vmc (vmclark) wrote :

This bug is a duplicated of, which was reported on Jan07.

Jonathan Thomas (echidnaman) wrote :

This bug is already triaged and had several dupes already. It doesn't really matter which was reported first; nobody wins anything.

Jonathan Thomas (echidnaman) wrote :

Fix released to Kubuntu 10.04. It will also be available with the KDE 4.4.0 packages for 9.10.

Changed in qt4-x11 (Ubuntu):
status: Fix Committed → Fix Released
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