unity-panel-service crashed with SIGSEGV in style_info_set_data()

[Amr Ibrahim]

I don't know what happened exactly. Apport reported this crash.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: indicator-appmenu 13.01.0+14.04.20140404-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-27.32~14.04.1-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Feb 19 20:43:06 2016
ExecutablePath: /usr/lib/unity/unity-panel-service
InstallationDate: Installed on 2015-06-16 (247 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
ProcCmdline: /usr/lib/unity/unity-panel-service
SegvAnalysis:
 Segfault happened at: 0x7fc1e7eeed38: mov (%rdi),%rdi
 PC (0x7fc1e7eeed38) ok
 source "(%rdi)" (0x00000020) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: indicator-appmenu
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_hash_table_remove_all () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_hash_table_destroy () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_hash_table_remove_all()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 style_info_set_data (data=data@entry=0x0, info=0x0) at /build/gtk+3.0-3sSotQ/gtk+3.0-3.10.8/./gtk/gtkstylecontext.c:555
 style_info_free (info=0x0) at /build/gtk+3.0-3sSotQ/gtk+3.0-3.10.8/./gtk/gtkstylecontext.c:570
 g_hash_table_remove_all_nodes (hash_table=0x202d920, notify=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/ghash.c:500
 g_hash_table_remove_all (hash_table=hash_table@entry=0x202d920) at /build/buildd/glib2.0-2.40.2/./glib/ghash.c:1371
 g_hash_table_destroy (hash_table=0x202d920) at /build/buildd/glib2.0-2.40.2/./glib/ghash.c:1067