gnome-panel assert failure: *** Error in `gnome-panel': free(): invalid pointer: 0x00000000024b29e0 ***

[Matthias Andree]

crash after Signal (a Chrome browser app) has opened its window.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: gnome-panel 1:3.18.3-0ubuntu0.1
ProcVersionSignature: Ubuntu 4.8.0-34.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AssertionMessage: *** Error in `gnome-panel': free(): invalid pointer: 0x00000000024b29e0 ***
CurrentDesktop: GNOME-Flashback:Unity
Date: Wed Mar 1 21:10:44 2017
ExecutablePath: /usr/bin/gnome-panel
GsettingsChanges:
 b'org.gnome.gnome-panel.layout' b'object-id-list' b"['menu-bar-0', 'show-desktop-0', 'workspace-switcher-0', 'object-0-1', 'object-0-0', 'object-0-4', 'object-0-5', 'object-0-3', 'object-0-7', 'object-0-2', 'launcher', 'launcher-0', 'launcher-1', 'launcher-2', 'launcher-3', 'launcher-4', 'launcher-5', 'window-list-applet']"
 b'org.gnome.gnome-panel.layout' b'toplevel-id-list' b"['top-panel-0', 'bottom-panel-0']"
 b'org.gnome.gnome-panel.run-dialog' b'history' b"['paprefs', 'paman', 'pavucontrol', 'trojita', 'clementine', 'VirtualBox', 'pidgin', 'darktable', 'rawtherapee', 'darktable', 'clementine', 'darktable', 'VirtualBox', 'diodon', 'killall -9 diodon', 'diodon', 'killall diodon', 'darktable', 'diodon ', 'VirtualBox']"
ProcCmdline: gnome-panel --replace
Signal: 6
SourcePackage: gnome-panel
Title: gnome-panel assert failure: *** Error in `gnome-panel': free(): invalid pointer: 0x00000000024b29e0 ***
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin audio cdrom dialout dip disk fax floppy fuse kvm libvirtd lpadmin netdev plugdev pulse sambashare saned tape vboxusers video

[Apport retracing service (apport)]

StacktraceTop:
 __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f4a167ef2e0 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
 malloc_printerr (ar_ptr=<optimized out>, ptr=<optimized out>, str=0x7f4a167ec0b2 "free(): invalid pointer", action=3) at malloc.c:5004
 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3865
 __GI___libc_free (mem=<optimized out>) at malloc.c:2966
 g_hash_table_unref () from /tmp/apport_sandbox_TWrmsK/lib/x86_64-linux-gnu/libglib-2.0.so.0