mate-panel crashed with SIGSEGV in IA__gtk_widget_get_parent()

[Bob Wareham]

I am using a LENOVO T500 with 4 gb memory and a new 500gb hard drive and have been using Linux mint with no problems but have changed to Linux mate and my sktop keeps crashing I loose everything on the desktop this is now three times in two days any help would be good.

Sorry that is all the information I have as my expereance is small as I have just changed to Linux so I am a new user.

Thanks Bob Wareham England UK

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: mate-panel 1.12.2-1
ProcVersionSignature: Ubuntu 4.4.0-11.26-generic 4.4.4
Uname: Linux 4.4.0-11-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CrashCounter: 1
CurrentDesktop: MATE
Date: Tue Mar 8 15:18:03 2016
ExecutablePath: /usr/bin/mate-panel
InstallationDate: Installed on 2016-03-07 (0 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224)
ProcCmdline: mate-panel --replace
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fba871c9976 <gtk_widget_get_parent+22>: cmp (%rdx),%rax
 PC (0x7fba871c9976) ok
 source "(%rdx)" (0x00000020) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: mate-panel
StacktraceTop:
 gtk_widget_get_parent () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 ?? ()
 g_cclosure_marshal_VOID__STRINGv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: mate-panel crashed with SIGSEGV in gtk_widget_get_parent()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 IA__gtk_widget_get_parent (widget=0x28cfb40) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gtk/gtkwidget.c:6483
 mate_panel_applet_locked_change_notify ()
 g_cclosure_marshal_VOID__STRINGv () from /tmp/apport_sandbox_SJzLNI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 _g_closure_invoke_va () from /tmp/apport_sandbox_SJzLNI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /tmp/apport_sandbox_SJzLNI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0

[Launchpad Janitor (janitor)]

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