wnck-applet crashed with SIGSEGV in _int_malloc()

[luca.mg]

it happens at every single login after reboot, I have to kill and restart mate-panel and then everything is ok

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: mate-panel 1.12.2-1
ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3
Uname: Linux 4.4.0-10-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CurrentDesktop: MATE
Date: Sun Mar 6 08:25:01 2016
ExecutablePath: /usr/lib/mate-panel/wnck-applet
InstallationDate: Installed on 2015-06-14 (265 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcCmdline: /usr/lib/mate-panel/wnck-applet
Signal: 11
SourcePackage: mate-panel
StacktraceTop:
 _int_malloc (av=av@entry=0x7f8939135c00 <main_arena>, bytes=bytes@entry=8) at malloc.c:3345
 __GI___libc_malloc (bytes=8) at malloc.c:2895
 g_malloc () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_memdup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_variant_new_variant () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: wnck-applet crashed with SIGSEGV in _int_malloc()
UpgradeStatus: Upgraded to xenial on 2015-11-18 (108 days ago)
UserGroups: adm audio cdrom dialout dip fax fuse lpadmin netdev plugdev sambashare scanner sudo tape video

[Apport retracing service (apport)]

StacktraceTop:
 _int_malloc (av=av@entry=0x7f8939135c00 <main_arena>, bytes=bytes@entry=8) at malloc.c:3345
 __GI___libc_malloc (bytes=8) at malloc.c:2895
 g_malloc () from /tmp/apport_sandbox_gIrEYA/lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_memdup () from /tmp/apport_sandbox_gIrEYA/lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_variant_new_variant () from /tmp/apport_sandbox_gIrEYA/lib/x86_64-linux-gnu/libglib-2.0.so.0

[Launchpad Janitor (janitor)]

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