Got this crash when Sound setting were open and I searched in the dash for backups, and clicked on Backups (aka deja dupe) :
The window for sound settings came to the front and after several seconds closed. Then the apport dialogue appeared and crash report was produced.
ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: unity-control-center 15.04.0+16.04.20160315-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
Uname: Linux 4.4.0-18-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 14 10:33:29 2016
ExecutablePath: /usr/bin/unity-control-center
InstallationDate: Installed on 2015-10-21 (175 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcCmdline: unity-control-center sound
ProcEnviron:
PATH=(custom, no user)
SHELL=/bin/bash
LANG=en_GB.UTF-8
LANGUAGE=en_GB:en
XDG_RUNTIME_DIR=<set>
Signal: 11
SourcePackage: unity-control-center
StacktraceTop:
malloc_printerr (ar_ptr=0x657565, ptr=<optimised out>, str=0x7f9f9351bdac "free(): invalid size", action=3) at malloc.c:4994
_int_free (av=0x657565, p=<optimised out>, have_lock=0) at malloc.c:3868
__GI___libc_free (mem=<optimised out>) at malloc.c:2969
?? () from /usr/lib/x86_64-linux-gnu/unity-control-center-1/panels/libsound.so
g_cclosure_marshal_VOID__STRINGv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: unity-control-center crashed with SIGSEGV in malloc_printerr()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
StacktraceTop:
malloc_printerr (ar_ptr=0x657565, ptr=<optimized out>, str=0x7f9f9351bdac "free(): invalid size", action=3) at malloc.c:4994
_int_free (av=0x657565, p=<optimized out>, have_lock=0) at malloc.c:3868
__GI___libc_free (mem=<optimized out>) at malloc.c:2969
update_alert_model (id=0x7f9f741d60a6 "__default", chooser=0x26251c0) at gvc-sound-
update_alert (chooser=0x26251c0, alert_id=<optimized out>) at gvc-sound-