** Description changed:

- I got this crash while playing with the sound indicator
+ TEST CASE:
+ 1. Open the sound menu
+ 2. Press the mouse button on the volume slider and hold it down to initiate a 
drag
+ 3. Move the mouse pointer over another indicator (e.g Calendar)
+ 
+ Result:
+ This crash.
  
  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: unity-services 4.20.0-0ubuntu2
  ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  ApportVersion: 1.23-0ubuntu2
  Architecture: i386
  CompizPlugins: 
[core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
  CrashCounter: 1
  Date: Mon Oct  3 09:41:12 2011
  ExecutablePath: /usr/lib/unity/unity-panel-service
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110209)
  ProcCmdline: /usr/lib/unity/unity-panel-service
  SegvAnalysis:
-  Segfault happened at: 0x1fb588 <g_type_check_instance+8>:    call   0x1d0df7 
<__i686.get_pc_thunk.bx>
-  PC (0x001fb588) ok
-  source "0x1d0df7" (0x001d0df7) ok
-  destination "(%esp)" (0xbf684000) not located in a known VMA region (needed 
writable region)!
-  Stack memory exhausted (SP below stack segment)
+  Segfault happened at: 0x1fb588 <g_type_check_instance+8>:    call   0x1d0df7 
<__i686.get_pc_thunk.bx>
+  PC (0x001fb588) ok
+  source "0x1d0df7" (0x001d0df7) ok
+  destination "(%esp)" (0xbf684000) not located in a known VMA region (needed 
writable region)!
+  Stack memory exhausted (SP below stack segment)
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: unity
  StacktraceTop:
-  g_type_check_instance (type_instance=0x98df010) at 
/build/buildd/glib2.0-2.30.0/./gobject/gtype.c:4051
-  g_signal_emit_valist (instance=0x98df010, signal_id=18, detail=0, 
var_args=0xbf68417c "") at /build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:2936
-  g_signal_emit (instance=0x98df010, signal_id=18, detail=0) at 
/build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:3060
-  ?? () from /usr/lib/libgtk-3.so.0
-  ?? () from /usr/lib/libgtk-3.so.0
+  g_type_check_instance (type_instance=0x98df010) at 
/build/buildd/glib2.0-2.30.0/./gobject/gtype.c:4051
+  g_signal_emit_valist (instance=0x98df010, signal_id=18, detail=0, 
var_args=0xbf68417c "") at /build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:2936
+  g_signal_emit (instance=0x98df010, signal_id=18, detail=0) at 
/build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:3060
+  ?? () from /usr/lib/libgtk-3.so.0
+  ?? () from /usr/lib/libgtk-3.so.0
  Title: unity-panel-service crashed with SIGSEGV in g_type_check_instance()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  XsessionErrors:
-  (nautilus:1600): Gtk-CRITICAL **: gtk_action_set_visible: assertion 
`GTK_IS_ACTION (action)' failed
-  (nautilus:1600): Gtk-CRITICAL **: gtk_action_set_visible: assertion 
`GTK_IS_ACTION (action)' failed
-  (indicator-weather:1603): libappindicator-WARNING **: Unable to connect to 
the Notification Watcher: 
GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name :1.75 was not 
provided by any .service files
+  (nautilus:1600): Gtk-CRITICAL **: gtk_action_set_visible: assertion 
`GTK_IS_ACTION (action)' failed
+  (nautilus:1600): Gtk-CRITICAL **: gtk_action_set_visible: assertion 
`GTK_IS_ACTION (action)' failed
+  (indicator-weather:1603): libappindicator-WARNING **: Unable to connect to 
the Notification Watcher: 
GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name :1.75 was not 
provided by any .service files

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https://bugs.launchpad.net/bugs/865122

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

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