gnome-tweak-tool crashes when changing a dconf key with another application

[Romano Giannetti]

Since upgrade to 13.10, ubuntu-tweak-tool crashes after few minutes of use (or simply leaving it running).
At the time it crashes, there is a message in syslog:

SYS: Oct 27 19:53:25 samsung-romano kernel: [ 6009.704170] dconf worker[12663]: segfault at 0 ip 00007fd1912621c0 sp 00007fd185009c48 error 4 in libpthread-2.17.so[7fd191254000+17000]

If I run it from a terminal, the message is:

(0)samsung-romano:~% gnome-tweak-tool
INFO : GSettings missing key org.gnome.nautilus.desktop (key computer-icon-visible)

(gnome-tweak-tool:12661): GVFS-RemoteVolumeMonitor-WARNING **: remote volume monitor with dbus name org.gtk.Private.UDisks2VolumeMonitor is not supported
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key titlebar-font)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key theme)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key action-double-click-titlebar)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key action-middle-click-titlebar)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key action-right-click-titlebar)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key focus-mode)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key mouse-button-modifier)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key resize-with-right-button)
INFO : GSettings missing key org.gnome.desktop.wm.preferences (key raise-on-click)
[1] 12661 segmentation fault (core dumped) gnome-tweak-tool

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-tweak-tool 3.8.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Sun Oct 27 19:55:08 2013
InstallationDate: Installed on 2013-09-30 (27 days ago)
InstallationMedia: Ubuntu-GNOME 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: gnome-tweak-tool
UpgradeStatus: Upgraded to saucy on 2013-10-18 (9 days ago)

[Romano Giannetti (romano-giannetti)]

To reproduce the bug, do the following:

1) open gnome-tweak-tool and don't do anything with it
2) open dconf-editor
3) go to org.gnome.desktop.wm.preferences
4) change the value of a key (for example, click on titlebar-use-system-font

-> gnome-tweak-tool crashes immediately.

[Launchpad Janitor (janitor)]

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

[Sergey Zolotarev (szx)]

I have a similar problem: gnome-tweak-tool always crashes after 10 or so seconds, no matter what I do with it (e.g. I can just leave it open and it still will crash).

[Romano Giannetti (romano-giannetti)]

@Sergey: yes, it crashes "doing nothing"for me too. I suppose that there are plenty of things that are changing dconf keys in background, and as soon as it happens, gnome-tweak-tool crashes...

[Sergey Zolotarev (szx)]

I managed to obtain a stack trace from gdb with debug symbols installed, hope this helps