unity8-dash crashed with SIGSEGV in QOpenGLContext::functions()

something must have happened during logout since some seconds later after login the report error message appeared. In previous session unity8 session Browser and settings was opened.

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: unity8 8.12+16.10.20160707-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-30.49-generic 4.4.13
Uname: Linux 4.4.0-30-generic x86_64
ApportVersion: 2.20.2-0ubuntu1
Architecture: amd64
Date: Sun Jul 10 23:07:47 2016
ExecutablePath: /usr/bin/unity8-dash
InstallationDate: Installed on 2016-05-17 (53 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160517)
ProcCmdline: unity8-dash --desktop_file_hint=/usr/share/applications/unity8-dash.desktop
SegvAnalysis:
 Segfault happened at: 0x7fb5f43b9e84 <_ZNK14QOpenGLContext9functionsEv+4>: mov 0x8(%rdi),%rbp
 PC (0x7fb5f43b9e84) ok
 source "0x8(%rdi)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%rbp" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity8
StacktraceTop:
 QOpenGLContext::functions() const () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
 QSGDefaultLayer::invalidated() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
 QSGDefaultLayer::~QSGDefaultLayer() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
 QSGDefaultLayer::~QSGDefaultLayer() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
 ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
Title: unity8-dash crashed with SIGSEGV in QOpenGLContext::functions()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo