unity8 crashed with SIGABRT in __gnu_cxx::__verbose_terminate_handler() on exit

[Eustachy Motyka]

Unity8 aborts on exit with:

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >'
  what(): Nested Mir Display Error: Failed to update EGL surface.

https://errors.ubuntu.com/problem/fc69b4f16d4d4571c83038bf9dc47b84135d9ced

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: unity8 8.02+15.04.20150302-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic i686
ApportVersion: 2.16.2-0ubuntu1
Architecture: i386
Date: Wed Mar 4 02:22:30 2015
ExecutablePath: /usr/bin/unity8
InstallationDate: Installed on 2014-12-10 (83 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha i386 (20141209)
ProcCmdline: unity8
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: unity8
StacktraceTop:
 __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 std::terminate() () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 __cxa_throw () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 ?? () from /usr/lib/i386-linux-gnu/libmirserver.so.30
Title: unity8 crashed with SIGABRT in __gnu_cxx::__verbose_terminate_handler()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __gnu_cxx::__verbose_terminate_handler () at ../../../../src/libstdc++-v3/libsupc++/vterminate.cc:95
 __cxxabiv1::__terminate (handler=0xb60e8d10 <__gnu_cxx::__verbose_terminate_handler()>) at ../../../../src/libstdc++-v3/libsupc++/eh_terminate.cc:47
 std::terminate () at ../../../../src/libstdc++-v3/libsupc++/eh_terminate.cc:57
 __cxxabiv1::__cxa_throw (obj=0x9729ba0, tinfo=0xb39d7d20 <typeinfo for boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::logic_error> >>, dest=0xb3820350 <boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::logic_error> >::~clone_impl()>) at ../../../../src/libstdc++-v3/libsupc++/eh_throw.cc:87
 boost::throw_exception<boost::exception_detail::error_info_injector<std::logic_error> > (e=...) at /usr/include/boost/throw_exception.hpp:70

[Michał Sawicz (saviq)]

Can you please post ~/.cache/upstart/unity8.log?

[Gerry Boland (gerboland)]

I suspect at shutdown, the "QScreen" backing the qquickwindow is deleted before the qquickwindow is closed - when that happens, qt still has gl resources it wants to release, so tries to acquire a new shared gl context and release them, before shutting down properly.

But this causes qtmir to try creating a new QPlatformOpenGLContext which tries to create a Display, while mir is shutting down, and I suspect the egl state is not suited to that.

Proper solution is to implement a QPlatformOffscreenSurface and use it on shutdown