crash after panel_background_change_background_on_widget

[bvpainter]

just got error message as above

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: mate-panel 1.12.2-1
ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
Uname: Linux 4.4.0-15-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CrashCounter: 1
CurrentDesktop: MATE
Date: Mon Mar 28 12:27:49 2016
ExecutablePath: /usr/bin/mate-panel
InstallationDate: Installed on 2016-03-26 (2 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323.1)
ProcCmdline: mate-panel
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: 0x7ff661ad9a3a <g_slice_alloc+426>: mov (%rax),%rdx
 PC (0x7ff661ad9a3a) ok
 source "(%rax)" (0x1f00000020) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: mate-panel
StacktraceTop:
 g_slice_alloc () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_slist_append () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 gtk_style_attach () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 panel_background_change_background_on_widget ()
Title: mate-panel crashed with SIGSEGV in g_slice_alloc()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 g_slice_alloc () from /tmp/apport_sandbox_iod7Me/lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_slist_append () from /tmp/apport_sandbox_iod7Me/lib/x86_64-linux-gnu/libglib-2.0.so.0
 IA__gtk_style_attach (style=0x228c430, window=0x21f45a0) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gtk/gtkstyle.c:733
 gtk_widget_set_style_internal (widget=0x23240f0, style=0x228c430, initial_emission=0) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gtk/gtkwidget.c:6998
 panel_background_change_background_on_widget ()

[Launchpad Janitor (janitor)]

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

[Vlad Orlov (monsta)]

Crashes after panel_background_change_background_on_widget call happened only in GTK+2 code, so it's already fixed for good since Ubuntu MATE 16.10.