compiz crashed with SIGSEGV in g_data_set_internal()

[Alan Pope 🍺🐧🐱 🦄]

Plugged HDMI cable into machine already running precise. Opened display settings and ticked 'mirror'. Compiz crashed.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: libnux-2.0-0 2.0.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-12.20-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Tue Jan 31 09:10:59 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120102)
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x7f4eb1938b55 <g_datalist_id_set_data_full+341>: mov 0x0(%r13),%esi
 PC (0x7f4eb1938b55) ok
 source "0x0(%r13)" (0xaaaaaaaaaaaaaaa8) not located in a known VMA region (needed readable region)!
 destination "%esi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 g_datalist_id_set_data_full () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 unity::PanelTray::~PanelTray() () from /usr/lib/compiz/libunityshell.so
 unity::PanelTray::~PanelTray() () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in g_datalist_id_set_data_full()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 g_data_set_internal (dataset=0x0, new_destroy_func=0, new_data=0x0, key_id=53, datalist=0xa91a30) at /build/buildd/glib2.0-2.31.12/./glib/gdataset.c:373
 g_datalist_id_set_data_full (datalist=0xa91a30, key_id=53, data=0x0, destroy_func=0) at /build/buildd/glib2.0-2.31.12/./glib/gdataset.c:680
 g_object_real_dispose (object=0xa91a20) at /build/buildd/glib2.0-2.31.12/./gobject/gobject.c:1001
 g_object_unref (_object=0xa91a20) at /build/buildd/glib2.0-2.31.12/./gobject/gobject.c:2971
 unity::ui::KeyboardUtil::GetAbsoluteKeyBounds (this=<optimized out>, key=0x2, row=0x8, section=0x2, geo=<optimized out>) at /build/buildd/unity-5.0.0/plugins/unityshell/src/KeyboardUtil.cpp:117

[Launchpad Janitor (janitor)]

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

[Omer Akram (om26er)]

This bug was reported on a development snapshot of Unity but lacks elements for it to be actionable:
- there seems to be no reports of further occurences of the issue
- the bug cannot be reproduced reliably
- the information provided is not sufficient to track down the issue to a particular programming error.
Could you please check if this issue is present in the current version, and if it is reopen the bug to a NEW status.

[Omer Akram (om26er)]

sorry wrong comment for the bug.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.