mate-panel crashed with SIGSEGV in gtk_rc_get_style()

[sshtrk]

Poped up on starup.

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: Wed Mar 9 21:46:51 2016
ExecutablePath: /usr/bin/mate-panel
InstallationDate: Installed on 2016-03-01 (8 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224)
ProcCmdline: mate-panel
SegvAnalysis:
 Segfault happened at: 0x7fbd441ce535: add (%rdi),%edx
 PC (0x7fbd441ce535) ok
 source "(%rdi)" (0x100000000) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: mate-panel
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 gtk_rc_get_style () 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
Title: mate-panel crashed with SIGSEGV in gtk_rc_get_style()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
XsessionErrors:
 mate-session[1264]: WARNING: Unable to find provider '' of required component 'dock'
 (mate-panel:1524): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
 (nm-applet:1555): Gdk-CRITICAL **: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 g_hash_table_insert_internal () from /tmp/apport_sandbox_dLiOOo/lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 ?? ()
 ?? ()

[Vlad Orlov (monsta)]

The backtrace has panel_background_change_background_on_widget, so this one is fixed now like bug 1562815.