unity-panel-service crashed with SIGSEGV in g_type_check_instance()

StacktraceTop:
 g_type_check_instance (type_instance=0x9e38e40)
 g_signal_handlers_disconnect_matched (instance=0x9e38e40,

Happened to me in Alpha 2. Did nothing.. occurred directly after start up.

http://paste.ubuntu.com/564585/ is a similar but more complete traceback. Seb128 says he can reproduce this by opening baobab, opening the preferences, closing it, closing baobab. Repeat. I can't seem to trigger it that way, but it's reliable for him.

This bug looks like it conincides with a compiz crash/bug. Will try to
pinpoint reproducible way to show correlation.
On Feb 8, 2011 12:06 PM, "Michael Terry" <email address hidden>
wrote:
> http://paste.ubuntu.com/564585/ is a similar but more complete
> traceback. Seb128 says he can reproduce this by opening baobab, opening
> the preferences, closing it, closing baobab. Repeat. I can't seem to
> trigger it that way, but it's reliable for him.
>
> --
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (713913).
> https://bugs.launchpad.net/bugs/685151
>
> Title:
> unity-panel-service crashed with SIGSEGV in g_type_check_instance()
>
> Status in Unity:
> Triaged
> Status in “unity” package in Ubuntu:
> Triaged
>
> Bug description:
> Binary package hint: unity
>
> $ lsb_release -rd
> Description: Ubuntu natty (development branch)
> Release: 11.04
>
> $ apt-cache policy unity
> unity:
> Installed: 3.2.2-0ubuntu2
> Candidate: 3.2.2-0ubuntu2
> Version table:
> *** 3.2.2-0ubuntu2 0
> 500 http://archive.ubuntu.com/ubuntu/ natty/main i386 Packages
> 100 /var/lib/dpkg/status
>
>
> Running Ubuntu 11.04 alpha1 release on an Asus Eee PC 1000
>
> I ran fireforx and that worked fine. Moved it to a difference virtual
> desktop by drag and drop, I clicked on the Ubuntu logo which brought
> up a nautilus window at /usr/share/applications and ran Pitivi,
> pinning it to the Unity launcher. Then as I was looking for open
> office I got a crash notification appearing in the Unity launcher, so
> clicked on it to generate this report.
>
> There is a black square under the tomboy icon that flashes like it is
> launching an application when it is clicked on. I may have clicked
> this before the crash.
>
> ProblemType: Crash
> DistroRelease: Ubuntu 11.04
> Package: unity 3.2.2-0ubuntu2
> ProcVersionSignature: Ubuntu 2.6.37-7.19-generic 2.6.37-rc3
> Uname: Linux 2.6.37-7-generic i686
> Architecture: i386
> CompizPlugins: No value set for
`/apps/compiz/general/allscreens/options/active_plugins'
> Date: Sat Dec 4 11:48:42 2010
> ExecutablePath: /usr/lib/unity/unity-panel-service
> LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
> LiveMediaBuild_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
> MachineType: ASUSTeK Computer INC. 1000
> PciDisplay: 00:02.0 VGA compatible controller [0300]: Intel Corporation
Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03)
(prog-if 00 [VGA controller])
> ProcCmdline: /usr/lib/unity/unity-panel-service
> ProcEnviron:
> SHELL=/bin/bash
> LANG=en_US.UTF-8
> ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true
file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet
splash --
> ProcVersionSignature_: Ubuntu 2.6.37-7.19-generic 2.6.37-rc3
> RelatedPackageVersions:
> xserver-xorg 1:7.5+6ubuntu3b1
> libgl1-mesa-glx 7.9+repack-1ubuntu2
> libdrm2 2.4.22-2ubuntu1
> xserver-xorg-video-intel 2:2.13.901-2ubuntu1
> xserver-xorg-video-ati 1:6.13.2-1ubuntu2
> SegvAnalysis:
> Segfault happened at: 0xdb4aa3 <g_type_check_instance+35>: mov (%eax),%edx
> PC (0x00db4aa3) ok
> source "(%eax)" (0x00000001) not located in a known VMA region...

My early investigation points to it being a bug in libdbusmenu because it frees a GtkAccelGroup object too early. I'm not sure yet, but that's the lead I have.

I agree..it's too early in the stage. I'll revisit after alpha 3 release..

On Tue, Feb 8, 2011 at 3:33 PM, Michael Terry
<email address hidden>wrote:

> My early investigation points to it being a bug in libdbusmenu because
> it frees a GtkAccelGroup object too early. I'm not sure yet, but that's
> the lead I have.
>
> --
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (713913).
> https://bugs.launchpad.net/bugs/685151
>
> Title:
> unity-panel-service crashed with SIGSEGV in g_type_check_instance()
>
> Status in Unity:
> Triaged
> Status in “unity” package in Ubuntu:
> Triaged
>
> Bug description:
> Binary package hint: unity
>
> $ lsb_release -rd
> Description: Ubuntu natty (development branch)
> Release: 11.04
>
> $ apt-cache policy unity
> unity:
> Installed: 3.2.2-0ubuntu2
> Candidate: 3.2.2-0ubuntu2
> Version table:
> *** 3.2.2-0ubuntu2 0
> 500 http://archive.ubuntu.com/ubuntu/ natty/main i386 Packages
> 100 /var/lib/dpkg/status
>
>
> Running Ubuntu 11.04 alpha1 release on an Asus Eee PC 1000
>
> I ran fireforx and that worked fine. Moved it to a difference virtual
> desktop by drag and drop, I clicked on the Ubuntu logo which brought
> up a nautilus window at /usr/share/applications and ran Pitivi,
> pinning it to the Unity launcher. Then as I was looking for open
> office I got a crash notification appearing in the Unity launcher, so
> clicked on it to generate this report.
>
> There is a black square under the tomboy icon that flashes like it is
> launching an application when it is clicked on. I may have clicked
> this before the crash.
>
> ProblemType: Crash
> DistroRelease: Ubuntu 11.04
> Package: unity 3.2.2-0ubuntu2
> ProcVersionSignature: Ubuntu 2.6.37-7.19-generic 2.6.37-rc3
> Uname: Linux 2.6.37-7-generic i686
> Architecture: i386
> CompizPlugins: No value set for
> `/apps/compiz/general/allscreens/options/active_plugins'
> Date: Sat Dec 4 11:48:42 2010
> ExecutablePath: /usr/lib/unity/unity-panel-service
> LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
> LiveMediaBuild_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
> MachineType: ASUSTeK Computer INC. 1000
> PciDisplay: 00:02.0 VGA compatible controller [0300]: Intel Corporation
> Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03)
> (prog-if 00 [VGA controller])
> ProcCmdline: /usr/lib/unity/unity-panel-service
> ProcEnviron:
> SHELL=/bin/bash
> LANG=en_US.UTF-8
> ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true
> file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet
> splash --
> ProcVersionSignature_: Ubuntu 2.6.37-7.19-generic 2.6.37-rc3
> RelatedPackageVersions:
> xserver-xorg 1:7.5+6ubuntu3b1
> libgl1-mesa-glx 7.9+repack-1ubuntu2
> libdrm2 2.4.22-2ubuntu1
> xserver-xorg-video-intel 2:2.13.901-2ubuntu1
> xserver-xorg-video-ati 1:6.13.2-1ubuntu2
> SegvAnalysis:
> Segfault happened at: 0xdb4aa3 <g_type_check_instance+35>: mov
> (%eax),%edx
> PC (0x00db4aa3) ok
> source "(%eax)" (0x00000001) not located in a known VMA region (needed
> readab...

See https://code.launchpad.net/~mterry/indicator-appmenu/free-entries-first/+merge/49120https://code.launchpad.net/~mterry/indicator-appmenu/free-entries-first/+merge/49120 for a fix.