unity8 crashed with SIGSEGV in XGetXCBConnection()

[Yulian]

again...

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: unity8 8.11+16.04.20160129-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Fri Feb 5 20:15:17 2016
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/unity8
ProcCmdline: unity8
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f0c104eb6e7 <XGetXCBConnection+7>: mov (%rax),%rax
 PC (0x7f0c104eb6e7) ok
 source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity8
StacktraceTop:
 XGetXCBConnection () from /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
 eglInitialize () from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
Title: unity8 crashed with SIGSEGV in XGetXCBConnection()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
upstart.unity8-filewatcher.log: