unity-control-center crashed with SIGSEGV in XQueryExtension()

[cosy]

this happened when starting backup app

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: unity-control-center 15.04.0+16.04.20160315-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Apr 1 01:41:43 2016
ExecutablePath: /usr/bin/unity-control-center
InstallationDate: Installed on 2016-02-19 (41 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcCmdline: unity-control-center deja-dup
Signal: 11
SourcePackage: unity-control-center
StacktraceTop:
 XQueryExtension () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XInitExtension () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XextAddDisplay () from /usr/lib/x86_64-linux-gnu/libXext.so.6
 ?? () from /usr/lib/nvidia-361/libnvidia-glsi.so.361.42
 ?? () from /usr/lib/nvidia-361/libnvidia-glsi.so.361.42
Title: unity-control-center crashed with SIGSEGV in XQueryExtension()
UpgradeStatus: Upgraded to xenial on 2016-03-22 (9 days ago)
UserGroups: adm cdrom debian-tor dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 XQueryExtension (dpy=dpy@entry=0x1980a00, name=name@entry=0x7f7851a477ef <error: Cannot access memory at address 0x7f7851a477ef>, major_opcode=major_opcode@entry=0x7fff0e2f2a74, first_event=first_event@entry=0x7fff0e2f2a78, first_error=first_error@entry=0x7fff0e2f2a7c) at ../../src/QuExt.c:43
 XInitExtension (dpy=dpy@entry=0x1980a00, name=name@entry=0x7f7851a477ef <error: Cannot access memory at address 0x7f7851a477ef>) at ../../src/InitExt.c:47
 XextAddDisplay (extinfo=0x7f7851c5fc80, dpy=0x1980a00, ext_name=0x7f7851a477ef <error: Cannot access memory at address 0x7f7851a477ef>, hooks=0x7f7851c52c00, nevents=0, data=0x0) at ../../src/extutil.c:110
 ?? ()
 ?? ()